13. What is the [H+] of a solution with a pH of 5.6? Use a scientific calculator.
(Points: 3)
5.0 × 105
8.3 × 106
2.5 × 106
7.7 × 105Which of the following [H+] values describes the most basic (alkaline) solution?
(Points: 3)
101 M
107 M
1012 M
1014 MLemon juice is a weak acid. It has a [H+] of 5.0 × 102 M. What is the pH of lemon juice? Use a scientific calculator.
(Points: 3)
1.0
1.3
1.0
2.5- Pyridine is a weak base with the formula C5H5N. Pyridine reacts with water according to the following equation: C5H5N + H2O C5H5NH+ + OH. What is the formula for the dissociation constant for this base?
(Points: 3)
Kb = [H+][CO2H]/[C5H5N]
Kb = [C5H5N]/[OH][CO2H]
Kb = [C5H5N][CO2H]/[OH]
Kb = [OH][C5H5NH+]/[C5H5N]1 Answer
H+]= 10^-5.6 =2.5 x 10^-6 M
10^-14 M
pH = - log 5.0 x 10^-2 =1.3
Kb = [OH-][C5H5NH+] / [C5H5N]