9. Which acid has the strongest conjugate base? A. H2O2 B. H2CO3 C. HCO3- D. HC2O4- 10. How many hydroxide ions are there in one litre of water? A. none C. approximately 1 x 10-14 mol B. approximately 1 x 10-7 mol D. Approximately 1 x 100 mol 11. Determine the products of the reaction between the following reactants. HSO3- + H2PO4- à ? + ? A. SO32- + H3PO4 C. H2SO3 + HPO42- B. water and a salt D. H3O+ and OH- only 12. True or false: A basic solution will turn only to yellow when tested with methyl orange indicator. A. True B. False

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Just solve question 9-12, thanks.

1.

What is the value of Kb for H2PO4-?

A. 1.3 x 10-12       B. 1.6 x 10-7                  C. 6.2 x 10-8            D. 7.5 x 10-3

2.

Which of the equations has a Bronsted-Lowry conjugate acid-base pair?

A. 2H2  +  O2 ß à  H2O                    C. Zn  +  2HCl  à  H2  +  ZnCl2

B. NaOH  à  Na+  + OH-                   D. H2O  +  HCN  ßà  H3O+  +  CN-

3.

What is the conjugate base of HSO4-(aq)?

A.  OH-(aq) B.  H2SO4(aq) C.  H3O + (aq) D.  SO4 2-(aq)

4.

Which term describes a substance that acts as a proton donor and a proton acceptor?

A.  amphoteric             B.  monoprotic            C.  polyprotic D.  acid-base

5.

What is t     What is the concentration of hydroxide ions in a solution of 0.350 mol/L HCl(aq)?

A.  0.350 mol/L             B.  0.175 mol/L           C.  2.86 x 10-14 mol/L D.  0.650 mol/L

6.

A solution contains 3.3 x10-8 M hydroxide ions. What is the pH of the solution?

A.  3.25 B.  6.51 C.  7.49 D.  8.00

7.

A solution has a pH of 4.65. What is the concentration (in M) of hydroxide ions in the solution?

1.0 x 10-14 B. 4.5 x 10-10  C.  1.0 x 10-7 D.  2.2 x 10-5

8.

Which solution would have the greatest conductivity? (HINT: conductivity increases as dissociation increases)?      A.  0.1M HCl                B. 0.1 M HCO3-              C. 0.1 M H2CO3                  D. 0.1 M HC2O4

9.

Which acid has the strongest conjugate base?

A. H2O2            B. H2CO3                         C. HCO3-       D. HC2O4-                                                         

10.

How many hydroxide ions are there in one litre of water?

A. none                                                                 C. approximately 1 x 10-14 mol

B. approximately 1 x 10-7 mol                               D. Approximately 1 x 100 mol

11.

Determine the products of the reaction between the following reactants.

HSO3-  +  H2PO4- à     ?  +   ?                  A. SO32-  +  H3PO4                                  C. H2SO3  +  HPO42-

                                                                      B. water and a salt                               D. H3O+ and OH- only

12.

True or false: A basic solution will turn only to yellow when tested with methyl orange indicator.

A. True     B. False

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