Question

Question 10

Which of the following IS a strong acid (1 point ) *

H2SO4

HCN

HF

NH3

Question 11

Write the equilibrium expression for a simple acid ionization. (HA (aq) -> H+ + A-) (1 point ) *

Ka = ([H+][A-])/[HA]

Ka = [H+]/[HA]

Ka = [H+][A-]

None of the above

Question 12

Write the equilibrium expression for the following reaction. HF (aq) -> H+ (aq) + F- (aq) (1 point ) *

Ka = ([H+][F-])/[HA]

Ka = [H+]/[HA]

Ka = [H+][F-]

None of the above

Question 13

Write the equilibrium expression for the following reaction. HClO4 (aq) -> H+ (aq) + ClO4- (aq) (1 point ) *

Ka = ([H+][ClO4-])/[HClO4]

Ka = [H+]/[HClO4]

Ka = [H+][ClO4-]

None of the above

Question 14

Calculate the OH- concentration at equilibrium in the following reaction: NH3 (aq) + H2O (l) -> NH4+ (aq) + OH- (aq) (Kb = 1.8 x10^(-5) (1 point ) *

1 x10^(-14) M

2.7 x10^(-3) M

7.2 x10^(-6) M

None of the above