arrange the following compounds in order of increasing acidity.

Rank the following compounds in order of increasing acidity. a. H2O, H3O-, Ho- == HO-, H2O, H3O- b. NH3
21,075 results
Organic Chemistry
Rank the following compounds in order of increasing acidity. a. H2O, H3O-, Ho- == HO-, H2O, H3O- b. NH3

asked by Rhea on August 4, 2014
Chemistry(Please check)
Which of the following equations correspond to the Ka2 for phosphoric acid? note: the double equal sign (==) means equilibrium. a) HPO42- (aq) + H2O (l) == H3O+(aq) + PO43-(aq) b) PO43- (aq) + H2O (l) == HPO42-(aq) + OH–(aq) c) H3PO4 (aq) + H2O (l) ==

asked by Hannah on April 1, 2012
Chem
Which equation represents what happens when a small amount of strong base is added to the buffer? OH- + A- A2- + H2O OH- + HA A- + H2O H3O+ + A- HA + H2O H3O+ + HA H2A+ + H2O

asked by Kyleigh on May 5, 2018
Chemistry
Arrange each group of compounds/ions in order of increasing pH. 1. Li2CO3 , OH^- , NH4Br , NaCl 2. CH4 , HBr , H2O , F^- Lastly, I’d like to check if my answers for the following three questions were listed correctly in order of pH levels increasing. 3.

asked by TP on March 31, 2018
O.CHEM -> PLEASE CHECK!!
Arrange the compounds in the order of increasing boiling point ***(LOWEST first): 1) H3C-O-CH3 2) H2O 3) CH3CH2OH 4) CH3CH2SH I think the order should be: #1, 4, 3, 2 Arrange the following in order of increasing rate of reactivity with conc.HBr ***(LEAST

asked by K on March 12, 2008

chem
Section: Ionization expressions, Weak Bases Using the equilibrium constants listed in your book, arrange the following .1 M aqueous solutions in order of increasing pH. a)NaNO2 b)HCl c)NaF d)Zn(H2O)3(OH)(NO3) Here’s what I have so far: a) NaNO2 –> Na+ +

asked by Chris on April 28, 2007
Chemistry
The question says write a reaction for the ionization of the following compound in water. Identify the acid, the base, the conjugate acid, and the conjugate base in each of them. 1. H2SO4 2. KOH 3. CH3COOH 4. NH3 5. HNO3 My guesses are: H2SO4 + H2O -> H3O+

asked by Samantha on May 31, 2009
Chemistry
1.The pH of a 0.10 mol/L aqueous solution of Fe(NO3)3 is not 7.00. The equation that best accounts for this observation is: a. Fe3+(aq) + 3H2O(l)Fe(OH)3(aq) + 3H+(aq) b. NO3-(aq) + H2O(l) HNO3(aq) + OH-(aq) c. Fe(H2O)63+(aq) + H2O(l)Fe(H2O)5(OH)2+(aq) +

asked by Anonymous on January 10, 2018
chemistry
Rank the following 3 compounds in terms of increasing boiling point: CCl4, CH4, CH2Cl2 – Rank the following 3 compounds in terms of increasing boiling point: CF4, CH4, CH2F2 – Water, H2O, is a liquid at room temperature. Hydrogen selenide, H2Se, is a

asked by adex on March 18, 2013
Chemistry
(a)What is the bond order of the diatomic molecule BN? (b) Is BN paramagnetic? (c) Rank the following compounds in order of increasing bond energy: B2, N2, BN. (d) Rank the following compounds in order of increasing bond length: B2, N2, BN.

asked by b on November 18, 2012
chemistry
Which reactants in the reactions below are acting as Br©ªnsted-Lowry bases? NH4 +(aq) + OH−(aq) NH3(aq) + H2O(l) H2PO4 −(aq) + H2O(l) H3O+(aq) + HPO4 2−(aq) is the answer H2O and the H3O+

asked by Jin on July 6, 2010
Chemistry
Rank the following solutions in order of increasing acidity. 1 M phenol 1 M boric acid 1 M cyanic acid 1 M formic acid 1 M hydrochloric acid 2. Rank the following solutions in order of increasing basicity. 1 M C3H5O3Na 1 M KF 1 M KOCN 1 M KOCl All I know

asked by Neha on October 23, 2011
chemistry
list the following substances in order of increasing molar entropy at 25’c. H2O(l), H2O(g), H2O(s), C(s), Ar (g) Explain your reasoning

asked by harry on February 12, 2013
chemistry
Which of the following chemical reactions represents a neutralization reaction? A. CH4 + 2O2 CO2 + H2O B. HCl + NaOH H2O + NaCl C. NH3 + H2O NH4++ OH- D. CH3COOH + H2O CH3COO- + H3O+

asked by jessie on September 12, 2016
chemistry
The term “Ka for the ammonium ion” describes the equilibrium constant for which of the following reactions? 1. NH3 + H2O ⇀↽ NH4 + + OH− 2. NH+ 4 + OH− ⇀↽ NH3 + H2O 3. NH3 + H3O + ⇀↽ NH+ 4 + H2O 4. NH+ 4 + H2O ⇀↽ NH3 + H3O + 5. The

asked by Anonymous on February 7, 2015

chemistry
Reverse the reactions. Label the acids and bases on the left-hand side of each of the reversed equations? 1. HCl + NH3 => NH4+ + Cl- 2.NH3 + H2O => NH4+ +OH- 3. HCl +H2O => H3O+ +Cl- 4. H3PO4 +H20 => HPO4^-2 +H3O+ 5.H2PO4- +H2O => HPO4^-2 +H3O+

asked by Alex on May 2, 2013
Chemistry, reactions w/ water
Write the equation for the reaction of each of the following with water. a) HCl b) CH3COOH c) NaOH d) NH3 Are these correct? a. HCl (aq) + H2O (l) –> H3O+ (aq) + Cl- (aq) b. CH3COOH (aq) + H2O (l) –> CH3COO- (aq) + H3O+ (aq) c. NaOH (aq) + H2O (l) –>

asked by Marissa on May 6, 2008
Chemistry

  1. Which of the following chemical reactions is most likely to have the largest equilibrium constant K? CH3COO- (aq) + H2O(l) = CH3COOH(aq) + OH-(aq) HCl(aq) + H2O(l) = H3O+(aq) + Cl-(aq) CH3COOH(aq) + H2O(l) = CH3COO- (aq) + H3O+(aq) H3PO4(aq) + NH3(aq) =

asked by Jameson on May 5, 2018
Chemisty !!
(a) Why do the densities of most liquids increase as they are cooled and solidified? How does water differ in this regard? (b) Rank the following compounds in order of decreasing surface tension at a given temperature, and explain your ranking. CH3CH3,

asked by Xiang ! on September 2, 2013
CHEMISTRY
Rank the following complex ions in order of increasing wavelength of light absorbed. (Use the appropriate symbol to separate substances in the list.) Co(H2O)63+, Co(CN)63-, CoI63-, Co(en)33+

asked by Sarah on March 19, 2012
CHEMISTRY
Rank the following complex ions in order of increasing wavelength of light absorbed. (Use the appropriate symbol to separate substances in the list.) Co(H2O)63+, Co(CN)63-, CoI63-, Co(en)33+

asked by Sarah on March 21, 2012
Chemistry – Order of Bond Polarity
Hi I am having a bit of trouble with this question CCl4 is confusing me: Qu)Rank the following compounds in order of bond polarity; HF, CH4, H2O, H2S, CCl4 Asw)lowest to highest bond polarity: CH4, CCl4, H2S, H2O, HF Is this correct? Thanks!

asked by Anonymous on May 11, 2016
CHEMISTRY
IDENTIFY THE CONJUGATE ACID-BASE PAIR IN THE FOLLOWING REACTIONS. A) HSO4^- + SO3^2- HSO3^- + SO4^2- B) S^2- + H20 HS^- + OH^- C) CN^- + H3O^+ HCN + H2O D) H2SE + H2O HSE^- + H3O^+

asked by HELPPPPP on October 15, 2011
chemistry
Calculate the value of [H3O+] in a 0.01 M HOBr solution. Ka = 2.5E-9 I’m having a problem with just writing the equilibrium expression. do you add H2O to the HOBr? HOBr + H2O H3O+ + OBr- but then you could say that because HOBr = .01 M, then 0Br- = .01 M,

asked by Audrey on November 23, 2010
Chemistry
Use the Bronsted-Lowry definitions to identify the two conjugate acid-base pairs in the following acid-base reaction: H20 + H20 H30^+ + OH^- Let’s see what you think on this after the previous post. Just remember, the acid is the one that HAS the H and the

asked by Raj on May 26, 2007

Chemistry
In the reaction Ca(H2O)+2 6 + H2O ! Ca(H2O)5(OH)+ + H3O+ the calcium compound on the left acts accord- ing to the Bronsted-Lowry theory as 1. a base. 2. an acid. 3. a salt. 4. a solvent.

asked by Anonymous on March 22, 2011
Biochemistry 105

  1. Arrange the following molecules in the order of increasing polarity. a. (PH3, HCl, H2O, CCl4) b. (NH3, HF, H2O, HBr)

asked by Sophia on February 12, 2017
chemistry
Acetic acid, CH3CO2H, is the active ingredient in vinegar. It’s often abbreviated “HOAc”. Vinegar is acidic because acetic acid makes H3O+ when it partially ionizes in water: HOAc(aq) + H2O H3O+(aq) + OAc–(aq) Suppose that you have a solution of

asked by hannah on March 19, 2013
Relative Acidities
Rank the given compounds on their relative acidity. Here was the order I thought it was but it turned out to be wrong. (i based it based off of sp being most acidic and sp3 being least acidic) STRONGEST HC(triple bond)C-CH3 H2C=CH2 CH3NH2 H2O CH4–>

asked by Allie on February 16, 2011
chemistry

  1. Which of the two reactions, A or B is a neutralization reaction? Explain why. A. HBr + H2O = Br- = H3O+ B. HClO + NaOH = NaClO + H2O 26. A. Look at the reaction again. when this reaction is reversed. Br- + H3O+ = HBr = H2O what substance is the acid,

asked by Sierra on September 16, 2014
Chemistry
Question 9 Unsaved What is the rate law for the following reaction, if the order of the reaction is m, an unknown? H2O2(aq) → H2O(l) + ½O2(g) a. k [H2O2]m b.k [H2O]m [O2]1/2 c.k [H2O] m /[H2O][O2 d.k[H2O] m [O2]m Thanks in advance. The k and m are meant

asked by Ramon on March 23, 2018
Chemistry – Le Chatelier’s Principle
Hi, I have a question regarding the following chemical equilibrium equation: 2CrO4^2- + 2H3O^+ Cr2O7^2- + 3H2O The question is: how would you manipulate the above equation to produce more Cr2O7^2- ions without adding any Chromium based compounds? I

asked by Constantine on March 9, 2014
chemistry
Write an equilibrium expression for each chemical equation involving one or more solid or liquid reactants or products. HCHO2(aq)+H2O(l)⇌H3O+(aq)+CHO−2(aq) Use A for [HCHO2], B for [H2O], C for [H3O+], D for [CHO−2].

asked by Anon on December 3, 2014
Chemistry
Rank the following 4 compounds in order of lowest to highest freezing point. Enter the formulas in the spaces provided. For example, enter CH4 as CH4. H2O MgO CH4 H2S

asked by Whats Good on November 19, 2011
Chemistry
Using the concentration of CH3COOH (0.8326M) and the equilibrium concentration of H3O+ (3.2×10-3), complete the reaction table for vinegar. Then calculate the acidity constant. Reaction table is given Ch3COOH + H2O –CH3COO- + H3O+ Initial. Change

asked by Danielle on October 15, 2015

Chemistry 102
For a question like “calculate the pH of an aq.solution that is 1.0 M CH3COOH and 1.0 M CH3COONa, how do you know to write the equation like this: CH3COOH + H2O => H3O+ + CH3COO- and not like H3O+ + CH3COO- => CH3COOH + H2O for the ICE chart. This would

asked by Nick on May 3, 2010
chemistry
Using the concentration of CH3COOH (0.8326M) and the equilibrium concentration of H3O+ (OJ = 31.6×10^-6 and milk = 3.16×10^-8), complete the reaction table for vinegar. Then calculate the acidity constant. Please show all work in solving the problem.

asked by Lisa on April 1, 2012
chemistry
rank the following ionic compounds in order of increasing lattice energy NaF, Csl, CaO

asked by re on March 3, 2011
Chemistry
rank the compounds below in order of increasing vapor pressure at 298 K? A) c3h6 B) c4h8 C) c5h10

asked by Vanessa on December 12, 2016
science ap chemistry
What is the equilibrium expression for the following acid dissociation reaction? CH3COOH + H2O CH3COO- + H3O+ A. [CH3COO-][H3O+]/[CH3COOH][H3O] B. [CH3COOH][H2O]/[CH3COO-][H3O+] C. [CH3COOH]/[CH3COO-][H3O-] D. [CH3COO-][H3O+]/[CH3COOH]

asked by jessie on September 10, 2016
chemistry
What is the equilibrium expression for the following acid dissociation reaction? CH3COOH + H2O CH3COO- + H3O+ A. [CH3COO-][H3O+]/[CH3COOH][H3O] B. [CH3COOH][H2O]/[CH3COO-][H3O+] C. [CH3COOH]/[CH3COO-][H3O-] D. [CH3COO-][H3O+]/[CH3COOH]

asked by jessie on August 22, 2016
acid base chem
I’m reviewing my notes for a test tomorrow, and I found that I have a question concerning acids that under go multiple protonizations. I know the molarity [or moles, if that’s being calculated] of H3O+ of the first protonization can be found using the Ka,

asked by Krystal on May 20, 2007
Chemistry
i need help. Calculate the pH of a 0.24 M CoCl3 solution. The Ka value for Co(H2O)63+ is 1.0 10-5. how do u do these with like the Cl there? Responses Chemistry – DrBob222, Monday, February 16, 2009 at 12:35am Just ignore the Cl^-. Co(H2O)6Cl3 ==>

asked by Lindsey on February 16, 2009
Chemistry
Rank the following compounds in order of increasing acid strength (1 = weakest, 4 = strongest) HCOOH CH2ClCOOH CHCl2COOH CH3COOH

asked by Matt on November 20, 2007
chemistry
Rank the following compounds in order of increasing acid strength (1 = weakest, 4 = strongest) HClO HClO3 HClO2 HClO4

asked by mark on November 18, 2007

CHEMISTRY
Consider a 58.4 g sample of H2O(g) at 125°C. What phase or phases are present when -162 kJ of energy is removed from this sample? Specific heat capacities: ice, 2.1 J g-1 °C-1; liquid, 4.2 J g-1 °C-1; steam, 2.0 J g-1 °C-1, ΔHvap = 40.7 kJ/mol, ΔHfus

asked by Sarah on November 17, 2012
Chemistry
Calculate the end point pH, when 25 mL of 0.01 mol/L HCl solution reacts exactly with 25 mL of 0.1 mol/L NH4OH solution. NH3 Kb = 1.8 x 10^-5 This will be the pH of NH4Cl solution. NH4+ + HOH ==> NH3 + H3O^+ Ka = Kw/Kb = (NH3)(H3O^+)/(NH4^+). Solve for

asked by Raj on May 31, 2007
Chemistry — Please Help!!
Find the pH of a mixture of .150 M HF(aq) solution and 0.100 M HClO2(aq) HF + H2O F- + H3O+ Ka= 3.510^-4 So I will show my attempt below… [HF] [F-] [H3O+] I .150 0 0 C -x +x +x E .15-x x x Ka= [F-][H3O+]/[HF] 3.510^-4= x^2/(.150-x) assume x is small so

asked by Erin on April 26, 2010
Chemistry
Hi I have two questions and I was hoping someone could help me with them. 1. Classify the following compounds as ionic or covalent a. MgCl2 b. Na2S c. H2O d. H2S 2. Which compound in each pair exhibits the stronger intermolecular hydrogen bonding? a. H2S

asked by Alekya on August 2, 2007
intro to chem
disolving sucrose, NaCl< and calcium chloried affect the boiling point of frezing point of water. Assuming that you have 0.1m solution of all these 3 compounds: a)rank then in order of decreasing freezing point. b) rank in order of increasing boiling point

asked by julia on October 27, 2010
Chemistry
Order in the increasing value of their polarity? HF NH3 H2O CO2 here i used the scale and got their numbers. HF>H2O>CO2>NH3 am i correct?

asked by Josh on August 17, 2017
chemistry
predict the order of increasing acidity of the compounds. Give a brief explanation why. Butanoic acid-Nexanoic acid-Benzoic acid-Acetic acid. thx

asked by david on November 6, 2010
chem
For the following reactions, name the Bronsted-Lowry acids and bases. Then name the conjugate acid and bases. H3O+(aq) + CN-(aq) HCN(aq) + H2O I’m really confused on this whole concept even thought it’s not really difficult. I said: acids: H3O+ bases: CN-

asked by Chris on April 27, 2007
Chem Oxidation-Reduction Titrations
H2O2→ O2 + 2H+ + 2e- OCl- + 2H+ + 2e-→ H2O+ Cl- H2O2(aq) + OCl-(aq) → H2O(l) + Cl- (aq) + O2(g)Assign oxidation numbers to the following atoms: O in H2O2 ; Cl in OCl- ______The oxidizing agent for this RedOx rxn is_______. The

asked by B on February 8, 2018
Enthalpy Change Calculations
Find the heat of reaction (ΔH) for each of the following chemical reactions and note whether each reaction is exothermic or endothermic. 1. H2O(l) -> H2O(g) This is what I have so far: H2(g) + ½ O2(g) -> H2O(l) ΔH = -286.0 kJ/mol H2(g) + ½ O2(g) ->

asked by Emily on August 5, 2015

CHM
Need help please Which of the following equations has the coefficients 2,1,1,2 when it is balanced? Fe2O3 + HClO4 → Fe(ClO4)3 + H2O Ca(OH)2 + H3PO4 → Ca3(PO4)2 + H2O KOH + H2SO4 → K2SO4 + H2O Ba(OH)2 + P4O10 → Ba3(PO4)2 + H2O Al2O3 + H2SeO4 →

asked by Aliyah on October 10, 2012
chemistry
Find the mass of water (H2O) needed to react with 150 grams of potassium (K) 2K(s) + 2 H2O (g)-2KOH +H2(g) How do I get the number of moles in H2O? Desperate to understand this. I got K= 150g./39.0983=3.84 mols of K. Then would it be 3.84(2mols H2O/7.68)

asked by Teresa on October 27, 2014
chemistry
the autoionization of water, as represented by the equation below, is known to be endothermic. What can be correctly said of what occurs as the temperature of water is raised?(please explain) H2O(l)+H2O(l)H3O+(aq) + OH-(aq)

asked by Anonymous on April 22, 2014
chemistry
Which of the following is a precipitation reaction? I. 2 Mg (s) + O2 (g) → 2 MgO (s) II. SO3 (g) + 2 H2O (l) → H3O+ (aq) + HSO4- (aq) III. Pb2+ (aq) + CrO42- (aq) → PbCrO4 (s) IV. 2 H2O (g) → 2 H2 (g) + O2 (g) V. Ag+ (aq) + 2 NH3 (aq) →

asked by sos on September 23, 2013
chemistry
intermolecular forces Rank the following substance from highest melting point to lowest melting point. My teacher gave a list of compounds: H2O, NO2,F2,CI2 and to have a high melting point means that you need a stronger IMF. Rank the following substances

asked by jen on March 17, 2009
CHEMISTRY
What are the ka and kb reactions of NaHSO3 ? I tried it out and thought it would be ka= HSO3-(aq) + H2O(l)= H+(aq) + SO3-(aq) kb= HSO3-(aq) + H2O(l)= H3O+(aq)+ OH-(aq) Would that be right? or is it wrong? please can you take a look at it . Thanks.

asked by Nia on October 20, 2011
CHEMISTRY
What are the ka and kb reactions of NaHSO3 ? I tried it out and thought it would be ka= HSO3-(aq) + H2O(l)= H+(aq) + SO3-(aq) kb= HSO3-(aq) + H2O(l)= H3O+(aq)+ OH-(aq) Would that be right? or is it wrong? please can you take a look at it . Thanks.

asked by Nia on October 20, 2011
CHEMISTRY
Identify the conjugate base in the following reaction. H2O (l) + HCO31- (aq) ¨ H3O+ (aq) + CO32- (aq)? Identify the Bronsted-Lowry acid in the following reaction. H2O (l) + HCO31- (aq) ¨ H3O+ (aq) + CO32- (aq)

asked by AL on December 3, 2014
chemistry
In the following options which one is maximum/highly exothermic reaction..? 1)SrO+h2o 2)BaO+h2o 3)CaO+h2o 4)MgO+h2o Pls…. Need it real quick

asked by piyush on April 27, 2013
Dr.Bob
A 100.0 mL sample of 0.05 M NH3 is titrated with 0.10 M HCl. Determine the pH of the solution after the addition of 50.0 mL HCl. Here is my work: NH3 + H3O+ –> NH4+ + H2O Before Addition: NH3= 0.005 mol H3O= 0 mol NH4+ = 0 mol Addition: NH3 = 0.005 mol

asked by Nevaeh on April 16, 2016

chemistry
What is the molarity of H3O+ in a 4.97×10-2 M NH4Cl solution that hydrolyzes according to the equation. NH4+(aq) + H2O(l) = H3O+(aq) + NH3(aq)

asked by uci student on May 4, 2010
chemistry
What is the molarity of H3O+ in a 5.33×10^-4 M NH2NH3Cl solution that hydrolyzes according to the equation. NH2NH3^+(aq) + H2O(l) = H3O^+(aq) + NH2NH2(aq)

asked by Diem on May 5, 2010
general chemistry
I’ve been trying to solve these for while now, and i keep getting them wrong…. please help!! A solution of NH4Cl hydrolyzes according to the equation. If the [NH3] in the solution after hydrolysis is 0.00000508 M, calculate the equilibrium concentration

asked by carly on November 5, 2010
Chemistry
How do you find the Ka1 and Ka2 of oxalic acid when it is in a solution that is 1.05 M H2C2O4 and has a pH of 0.67. [C2O4^2-] = 5.3×10^-5 M. I have tried using an ICE table for both reactions, as oxalic acid is a diprotic acid, but I am having trouble

asked by Erika on November 1, 2015
chem 2
indictae the reactant that is a bronsted lowry acid. HCN(aq) +H2O (l)—> H3O+(aq)=CN-(aq) HCN CN- H20 H30 i think it is HCN the weak acid substance which acts as a proton (H+) donor and CN the weak base? You are right. The HCN donates the proton (to H2O)

asked by jane on April 30, 2007
Chemistry
Consider 2 separate solutions, one of a weak acid HA and one of HCL. Assume that you started with 10 molecules of each. Draw a picture of what each solution looks like at equilibrium. Ok to my very limited knowledge on this subject so far, a weak acid at

asked by kevin on October 11, 2011
chemistry
what is the pH of a solution that is .15 M in HOCl and .25 M NaOCl after .05 mol HCl/L has been bubbled into the solution? this is what I did: HOCl + H2O —-> H3O+ + OCl- .15 .25 -.05 +.05 ————————— .1 .30 3.5E-8=[H3O][.3]/[.1] H3O=

asked by Audrey on November 23, 2010
chem
Rank these in order of increasing freezing points: C2H6O, NaCl, NaSO4, C12H22O11 I suggest that you look them up. You will have to make an assumption at the isomer of the organic compounds that is intended, but it will not make a difference to the ranking.

asked by Helen on April 18, 2007
Chemistry
Find the mass of water (H2O) needed to react with 150 grams of potassium (K) 2K(s) + 2 H2O (g)-2KOH +H2(g) How do I get the number of moles in H2O? Desperate to understand this. I got K= 150g./39.0983=3.84 mols of K. Then would it be 3.84(2mols H2O/7.68)

asked by Teresa on October 27, 2014
Chemistry
If we were asked to order SO2,H2O,CuO and CaO considering their acidity, how do we find what is more acidic from CaO and CuO?

asked by Shenaya on July 27, 2017

Chemistry URGENT/DR BOB
Can someone may sure that I balanced the following groups of equations correctly. Write an equation to show how acetic acid reacts with water to produce ions in solution. C2H4O2 + H2O >>>>>>> H3O + C2H3O Write an equation for the neutralization of HCl and

asked by jazz on April 23, 2014
chemistry
Choose the groups of molecules below in which all the molecules have a net dipole moment. a. SiHCl3, O2, H2O b. HF, H2ClCH2, H2O c. HF, CH3Cl, H2O d. CCl4, HCl, NH3 e. HF, H2O, N2

asked by janet on January 24, 2008
Chemistry
Which of the following processes is endothermic? a) H2O (g) –> H2O (l) b) 3O2 (g) + 2CH3OH(g) –> 2CO2(g) + 2H2O(g) c) H2O (s) –> H2O (l) d) O2(g) + 2H2(g) –> 2H2O(g) I a guessing b, since energy has to go into the reaction for water to go from a solid

asked by Anon on March 24, 2017
chemistry
what is the Molarity (M) of a 0.87m aqueous solution of ammonia, NH3? The density of the solution is 0.823 g/mL. Answer: 0.71 M So I have: 0.823 g H2O+NH3/1 ml H2O+NH3 17.034 g NH3/1 mol 18.016 g H2O/1 mol 0.87 mol NH3/1 kg H2O I’ve tried this several ways

asked by molality—>molarity on July 10, 2011
CHEMISTRY
which one of the following reactions represents the balanced chemical equation for the formation of water from hydrogen gas and oxygen gas? a. 2H(g) + O(g) a H2O(I) b. H2(g) +o(g) a H2O(I) c. 2 H2(g) + O2(g) a 2 H2O(I) d. 2 H(g) + 1/2 O2(g) a H2O(I)

asked by GRACE on May 9, 2010
Chemistry
The aquation of tris(1,10-phenanthroline)iron(II) in acid solution takes place according to the equation: Fe(phen)32++ 3 H3O++ 3 H2O →Fe(H2O)62++ 3 phenH+. If the activation energy, Ea, is 126 kJ/mol and the rate constant at 30°C is 9.8 × 10-3 min-1,

asked by Derek on December 2, 2014
Chemistry
Hi there, can someone please help me with this chemistry problem? Write the equation for the acid-base reaction that takes place when nitric acid (HNO3) dissolves in H2O. (Include the phase of each substance.) I got HNO3(aq) + H2O –> H3O+(aq) + NO3−(aq)

asked by Amy on December 18, 2017
Chemistry
Can someone please help me with these chemistry questions…I just don’t get it! 1. Using the following elements, rank them in order of increasing melting points, based on the periodic trend for melting point: Sr, Mg, Be, Ba? Would it be Be, Mg, Sr, Ba or

asked by Taylor on September 16, 2009
Chem 2
You are instructed to create 600. mL of a 0.56 M phosphate buffer with a pH of 7.6. You have phosphoric acid and the sodium salts NaH2PO4, Na2HPO4, and Na3PO4 available. (Enter all numerical answers to three significant figures.) H3PO4(s) + H2O(l)

asked by Mia Ismaili on October 26, 2016
Chemistry

  1. What will happen if I add water to a FeSCN+2 solution? FeSCN+2(aq) + H2O(l) ???? 2. Will the equilibrium shift to the left or right? The FeCNS++ is red colored. I think adding water will simply dilute the red color. Won’t it react in any way? Small

asked by Fiona on May 1, 2007

chem
Are these correct? Rank the following species in order of increasing acidity. Explain your reasons of ordering them as you do. NH3 ,H2SO4, CH3OH, CH3COOH CH3COOH > H2SO4> CH3OH >NH3 Rank the following species in order of increasing basicity. Explain your

asked by manny on August 20, 2007
college chem
You are instructed to create 400. mL of a 0.40 M phosphate buffer with a pH of 6.9. You have phosphoric acid and the sodium salts NaH2PO4, Na2HPO4, and Na3PO4 available. (Enter all numerical answers to three significant figures.) H3PO4(s) + H2O(l)

asked by leah on June 23, 2014
chem
Predict the order of the increasing vapor pressure for the following compounds: FCH2CH2F FCH2CH2OH HOCH2CH2OH Result:the order its written that the oreder it’s increasing but im not sure

asked by Ron on June 11, 2007
chemistry
Diborane (B2H6) is a highly reactive boron hydride, which was once considered as a possible rocket fuel for the U.S. space program. Calculate ∆H for the synthesis of diborane from its elements, according to the equation 2 B (s) + 3 H2 (g) → B2H6 (g)

asked by Lisa on January 25, 2015
Chemistry
You are instructed to create 500. mL of a 0.25 M phosphate buffer with a pH of 7.7. You have phosphoric acid and the sodium salts NaH2PO4, Na2HPO4, and Na3PO4 available. (Enter all numerical answers to three significant figures.) H3PO4(s) + H2O(l)

asked by Sarah on March 6, 2019
Chemistry- HW Check
I have seven homework problems. I did them but I wasn’t sure if I did them correctly. Did I do them correct? Thank you! Give the reaction that describes how the hydrazine, N2H4(aq), / hydrazinium ion, N2H51+(aq), buffer reacts with a strong base such as

asked by Maegan G on November 15, 2011
Chemistry
Oxalic acid, found in the leaves of rhubarb and other plants, is a diprotic acid. H2C2O4 + H2O ↔ H3O+ + HC2O4- Ka1= ? HC2O4- + H2O ↔ H3O+ + C2O42- Ka2 = ? An aqueous solution that is 1.05 M H2C2O4 has pH = 0.67. The free oxalate ion concentration in

asked by Ashley on November 15, 2016
chem
In a solution prepared by mixing CH3OH with H2O the major species pesent are 1. a. CH3+, OH, and H2O 2. b. CH3O, H+, and H2O 3. c. CH3OH and H2O 4. d. CH3OH, H+, and OH I know i have to get an equation having trouble doing that!! please help!!

asked by Mark on April 24, 2010
chemistry
According to the following thermochemical equation, what mass of H2O (in g) must form in order to produce 975 kJ of energy? SiO2(s) + 4 HF(g) → SiF4(g) + 2 H2O(l), ΔH°rxn = -184 kJ

asked by Amber on June 14, 2011
Chemistry Logic
How can I tell a conjugate base from a regular base and a conjugate acid from a regular acid? For example, in: H2O + HONH3 (reversible arrows) HONH2 + H3O+ What is the acid, base, conjugate base, conjugate acid? Is there no base and conjugate base since

asked by Taasha on August 3, 2007

chemistry
Acid dissociation constant for HNO3+H2O-H3O+ +NO3= I have [H3O+][NO1-3]/[HNO3] Do I have this right?

asked by Sarah on November 22, 2011
chemistry
Consider the exothermic reaction CoCl42-(aq) + 6 H2O(l) Co(H2O)62+(aq) + 4 Cl -(aq). Will the equilibrium concentration of CoCl42- increase or decrease when the following changes occur? a) HCl is added. (b) Co(NO3)2 is added. both of those compounds are

asked by Robbin on April 19, 2011
Chemistry
I don’t really understand why unit analysis works. I found a simple example on a website (I can post the link in a comment if you want). It says, For example, convert 18 grams of water to moles. The molar mass of water is 18 g/mol; therefore : 18g H2O x 1

asked by A Canadian on February 7, 2013
Chemistry
Complete the following equilibrium reactions that are pertinent to an aqueous solution of Ag2CO3. Physical states, s, l, g, and aq, are optional. So far I worked it out to be: Ag2CO3(s) 2Ag^+ + CO3^(2-) H2CO3(aq) + H2O(l) H3O^(1+) + (HCO3)^(-) HCO3^(-)(aq)

asked by Craig on April 6, 2016
chemistry
Identify the acid/conjugate base and base/conjugate acid pairs for the following reactions H2CO3(aq) + H2O(l) H3O+(aq) + HCO3 -(aq) C5H5N(aq) + H2O(l) C5H5NH+(aq) + OH-(aq

asked by jake on April 28, 2011

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