Honors: Acids and bases, pH calculations

The pH scale is a range from:

• 1-7
• 0-14
• 1-5
• 1-20

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

• Acid
• Alkaline
• Base
• Buffer

A(n) _______ is a substance with a pH greater than 7.

• Base
• Acid
• Buffer
• Water

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 [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 [H⁺] in a solution with a pH of 11?

• 1 x 10^-1 M

• 1 x 10^-2 M

• 1 x 10¹¹ M

• 1 x 10^-11 M

If the pH of a solution is 5.6 the pOH is

• 6.5
• 12.4
• 8.4
• 5.6