What is the [H+] of a solution with a pH of 5.6?

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 × 105

Which of the following [H+] values describes the most basic (alkaline) solution?

(Points: 3)

   101 M

   107 M

   1012 M

   1014 M

Lemon 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
  1. 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]

Leave a Comment