Chemistry

answer

watching

676

views

13 Dec 2019

Aqueous solutions of phosphoric acid and sodium nitrite are combined, and the following equilibrium is established. H3PO4(aq) + NO2-(aq) <----> H2PO4-(aq) + HNO2(aq) The equilibrium constant Kc for this reaction is greater than one. Based on this information, which of the following statements is correct?

A) Phosphoric acid is a weaker acid than nitrous acid.

B) Nitrous acid is a weaker acid than water.

C) The nitrite anion is a weaker base than the dihydrogen phosphate anion.

D) The dihydrogen phosphate anion is a stronger acid than nitrous acid.

E) Phosphoric acid is a stronger acid than nitrous acid.

answer

watching

676

views

For unlimited access to Homework Help, a Homework+ subscription is required.

You have 0 free answers left.
Get unlimited access to 3.8 million step-by-step answers.

Get unlimited access

Already have an account? Log in

Jarrod RobelLv2

17 Dec 2019

Unlock all answers

Get 1 free homework help answer.

Already have an account? Log in

Join us on Discord

Chemistry Study Group

Join now

Related questions

Please arrange the following acids in order of increasing strength.

H3PO4 < H2PO4- < HPO4 ^-2

H2PO4- < H3PO4 < HPO4 ^-2

HPO4-2 < H2PO4- < H3PO4

H3PO4 < HPO4 ^-2 < H2PO4-

All of these acids have the same strength

Consider the following Ka values;

acetic acid Ka[CH3COOH (aq)] = 1.80 x 10^-5

chloroacetic acid Ka[CH2ClCOOH (aq)] = 1.40 x 10^-3

hypochlorous acid Ka[HClO (aq)] = 2.90 x 10^-8

hydrofluoric acid Ka[HF (aq)] = 6.30 x 10^-4

formic acid Ka[HCOOH (aq)] = 1.80 x 10^-4

Which of the following is a correct statement?

Hypochlorous acid is the weakest acid listed

Acetic acid is a weaker acid than hypochlorous acid

Chloroacetic acid is the strongest acid on the list

Formic acid is a stronger acid than acetic acid

Formic acid is a weaker acid than hydrofluoric acid

Which of the following statements strong and weak acids is correct?

Weak acids completely dissociate in solution

Strong acids completely dissociate in solution

A 0.05 M solution of an acid is a weak acid

Strong acids only partially dissociate in solution

Weak acids completely dissociate in solution

Which of the following is not an Arrhenius acid, but is a Lewis acid??

Which of the following compounds is not amphoteric?

Show transcribed image text Determine the pH (to two decimal places) of the following solutions. A table of pKa values can be found here. If the 5% approximation is valid, use the assumption to compute pH 6.77x102 M dichloroacetic acid Submit Answer Tries o/3 9.36x10 M carbonic acid Submit Answer Tries 0/3 7.99x10 M sodium fluoride Submit Answer Tries 0/3 9.75x10-3 M sodium propanoate Submit Answer Tries 0/3
Acid name trifluoroacetic acid trichloroacetic acid oxalic acid dichloroacetic acid sulfurous acid hydrogen sulfate ion chlorous acid phosphoric acid chloroacetic acid bromoacetic acid citric acid hydrofluoric acid nitrous acid acetylsalicylic acid formic acid lactic acid ascorbic acid hydrogen oxalate ion benzoic acid phenylammonium ion Acid formula F3CCOOH Cl3CCOOH HOOCCOOH Cl2HCCOOH pKa Conjugate base 0.20 F3CCOO 0.66 Cl3 CCOO 1.23 HOOCCOO 1.30 Cl2HCCOO Conjugate base name trifluoroacetate ion trichloroacetate ion hydrogen oxalate ion dichloroacetate ion hydrogen sulfite ion HCIO2 chlorite ion dihydrogen phosphate ion 11.88 chloroacetate ion bromoacetate ion 2 CIH2CCOOH BrH2CCOOH C3H50(COOH)3 2.87 CIH2CCOO 2.90 BrH2CCOO 3.13 C3HsO(COOH)2COO dihydrogen citrate ion 10.87 fluoride ion nitrite ion acetylsalicylate ion formate ion lactate ion ascorbate ion oxalate ion benzoate ion phenylamine (aniline) HNO2 3.48 C8H7O2COO 3.75 HCOo 3.86 C2HsOCOO 4.10 C5H7O4COO 4.19OOCCOO 4.20 C6Hs COO 4.63 C6H5 NH2 HCOOH C2HsOCOOH Ð½Ð¾Ð¾ÑÑÐ¾Ð¾ C6HsCOOH Acid name Acid formula CH3COOH C3H50(COOH)2COO- CH3CH2CH2COOH CH3CH2COOH Conjugate base name acetate ion hydrogen citrate ion butanoate ion propanoate ion acetic acid 4.75 CH3COO 4.77 | C3H50(COOH)(COO-)2 4.82 CH3CH2CH2COO 4.87 CH3CH2CO0 dihydrogen citrate ion | butanoic acid propanoic acid pyridinium ion carbonic acid hydrogen citrate ion hydrogen sulfite ion dihydrogen phosphate ion hypochlorous acid ammonium ion Ð½Ð¾ÑÐ¾Ð¾Ð½ 6.37 HOCOO hydrogen carbonate ion 7.63 C3H50(COOH)(COO-)2 | 6.40 | C3H5O(COO-)3 H2PO4 HCIO hydrogen phosphate ion 6.80 hypochlorite ion ammonia HCN 10.00 C6H5O phenol hydrogen carbonate ion HOCOO henolate ion carbonate ion

Calculate the pH change that results when 12 mL of 5.9 M NaOH is added to 763 mL of each the following solutions. (See the appendix.)

(a) pure water

(b) 0.10 M NH₄Cl

(c) 0.10 M NH₃

(d) a solution that is 0.10 M in each NH₄⁺ and NH₃

Acid Name	ConjugateAcid	K_a	pK_a	Conjugate Base	Base Name
perchloric acid	HClO₄	>>1	< 0	ClO₄^1-	perchlorate ion
hydrohalic acid	HX (X=I,Br,Cl)	>>1	< 0	X^1-	halide ion
sulfuric acid	H₂SO₄	>>1	< 0	HSO₄^1-	hydrogen sulfate ion
nitric acid	HNO₃	>>1	< 0	NO₃^1-	nitrate ion

hydronium ion	H₃O¹⁺	1.0	0.00	H₂O	water
iodic acid	HIO₃	0.17	0.77	IO₃^1-	iodate ion
oxalic acid	H₂C₂O₄	5.9 x 10^-2	1.23	HC₂O₄^1-	hydrogen oxalate ion
sulfurous acid	H₂SO₃	1.5 x 10^-2	1.82	HSO₃^1-	hydrogen sulfite ion
hydrogen sulfate ion	HSO₄^1-	1.2 x 10^-2	1.92	SO₄^2-	sulfate ion
phosphoric acid	H₃PO₄	7.5 x 10^-3	2.12	H₂PO₄^1-	dihydrogen phosphate ion
hydrofluoric acid	HF	7.2 x 10^-4	3.14	F^1-	fluoride ion
nitrous acid	HNO₂	4.0 x 10^-4	3.40	NO₂^1-	nitrite ion
lactic acid	HC₃H₅O₃	6.4 x 10^-5	3.85	C₃H₅O₃^1-	lactate ion
formic acid	HCHO₂	1.8 x 10^-4	3.74	CHO₂^1-	formate ion
hydrogen oxalate ion	HC₂O₄^1-	6.4 x 10^-5	4.19	C₂O₄^2-	oxalate ion
hydrazoic acid	HN₃	1.9 x 10^-5	4.72	N₃^1-	azide ion
acetic acid	HC₂H₃O₂	1.8 x 10^-5	4.74	C₂H₃O₂^1-	acetate ion
carbonic acid	H₂CO₃	4.3 x 10^-7	6.37	HCO₃^1-	hydrogen carbonate ion
hydrogen sulfite ion	HSO₃^1-	1.0 x 10^-7	7.00	SO₃^2-	sulfite ion
hydrosulfuric acid	H₂S	1.0 x 10^-7	7.00	HS^1-	hydrogen sulfide ion
dihydrogen phosphate ion	H₂PO₄^1-	6.2 x 10^-8	7.21	HPO₄^2-	hydrogen phosphate ion
hypochlorous acid	HClO	3.5 x 10^-8	7.46	ClO^1-	hypochlorite ion
ammonium ion	NH₄¹⁺	5.6 x 10^-10	9.25	NH₃	ammonia
hydrocyanic acid	HCN	4.0 x 10^-10	9.40	CN^1-	cyanide ion
hydrogen carbonate ion	HCO₃^1-	4.7 x 10^-11	10.33	CO₃^2-	carbonate ion
hydrogen phosphate ion	HPO₄^2-	4.8 x 10^-13	12.32	PO₄^3-	phosphate ion
hydrogen sulfide ion	HS^1-	1.3 x 10^-13	12.89	S^2-	sulfide ion
water	H₂O	1.0 x 10^-14	14.00	OH^1-	hydroxide ion

ammonia	NH₃	<<10^-14		NH₂^1-	amide ion
hydroxide ion	OH^1-	<<10^-14		O^2-	oxide ion

Weekly leaderboard

Home

Homework Help 3,900,000

Chemistry 830,000

Unlock all answers

Related textbook solutions

Basic Chemistry

Principles of Chemistry Molecular Approach

Chemistry: Structure and Properties

Principles of Chemistry Molecular Approach

Chemistry: A Molecular Approach

Chemistry: A Molecular Approach

Principles of Chemistry: A Molecular Approach

Chemistry: The Central Science

Related questions

Weekly leaderboard