Ph and H Plus

What is the pH of a solution that has a [H+] of 2.5 x 10-5?

• 4.60
• 5.0
• 2.5
• 7

What is the pOH of a solution where the [OH-] is 7.3 x 10-2 M?

• -1.14
• 2.0
• 1.14
• 7.3

What is the [H+] if the pH is 4.0?

• 1.0 x 10-10  M
• 1.0 x 10-4  M
• 1.0 x 10-14  M
• 1.0 x 10-7  M

What is the pOH of a solution that has a pH of 2?

• 10
• 12
• 14
• 1

What is the [OH-] if the pH is 4.9?

• 7.94 x 10-10 M
• 1.0 x 10-4  M
• 7.94 x 10-14 M
• 4.9 x 10-10 M

What is the [OH-] if the [H+] is
1.0 x 10^-3M?

• 1.0 x 10-3 M
• 6.02 x 10-23 M
• 1.0 x 10-14 M
• 1.0 x 10-11 M

The pH of an aqueous solution is 0.8. What is the hydrogen ion concentration?

• 0.16 M

• 0.25 M

• 0.15 M

• 0.50 M

What is the pH of a 1.0 M solution of HCl

• 14

• 7

• 3.5

• 0

Which of these solutions, all with a concentration 0.2 M, will have the highest pH?

• HF  Ka = 7.2 x 10^-4
• benzoic acid Ka = 6.3 x 10^-5
• H₂SO₃ Ka = 1.2 x 10^-2
• H₃O⁺  Ka = 55.5

A solution prepared with the base CN^- (Kb = 2.5 x 10^-5) has a concentration of 0.25 M of the base.  Calculate the pH for the solution.

• 4.6
• 9.4
• 2.6
• 11.4