10. Consider the following equilibrium reaction: HSO 4 (aq) + OH (aq) SO 4 2 (aq

ID: 950332 • Letter: 1

Question

10. Consider the following equilibrium reaction:

HSO4(aq) + OH(aq) SO42(aq) + H2O(l)

Which substances are acting as acids in the reaction?

[A] OH and SO42 [B] SO42 and H2O [C] HSO4 and OH

[D] HSO4 and H2O [E] None of the substances are acting as acids in this reaction

11. The dihydrogenphosphate ion, H2PO4 is amphiprotic. In which of the following reactions is this ion serving as a base?

I. H3O+(aq) + H2PO4(aq) H3PO4(aq) + H2O(l)

II. H3O+(aq) + HPO42(aq) H2PO4(aq) + H2O(l)

III. H3PO4(aq) + HPO42(aq) 2 H2PO4(aq)

[A] I only [B] I and II [C] I and III [D] II and III [E] I, II and III

12. In basic solution, ________

[A] [H3O+]=[OH] [B] [H3O+]= 0M [C] [OH]> 7.00

[D] [H3O+]<[OH] [E] [H3O+]>[OH]

13. The molar concentration of hydronium ion in pure water at 25 °C is ________

[A] 0.00 M [B] 7.00 M [C] 1.0 x10-7 M [D] 1.00 M [E] 1.0 x 10-14 M

14. The magnitude of Kw indicates that ________

[A] the autoionization of water is exothermic

[B] water autoionizes only to a very small extent

[C] water autoionizes very quickly

[D] water autoionizes very slowly

10) acid = donates proton , base = accepts proton

Therefore, ans = [D] HSO4 and H2O

11) base = accepts proton

Therefore, ans = [A] I only

12) [D] [H3O+]<[OH]

13) [C] 1.0 x10-7 M

14) [B] water autoionizes only to a very small extent

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.