PH Calculations

A pH of 14 is a .....

• strong acid
• weak acid
• Strong base
• Weak base

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 [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

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 does a pH scale do?

• Tells you if a substance is an acid.
• Tells you if a substance is a base.
• Measures the strength or weakness of an acid or base.
• All of these are true.

A(n) ______ is a substance with a pH less than 7

• Acid
• Alkaline
• Base
• Buffer

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

• 4.60
• 5.0
• 2.5
• 7