Acids and Bases

Which of the following is a conjugate acid/base pair?

• H₂SO₃ / SO₃^2–

• HCl/H₂O

• HC₂H₃O₂ / C₂H₃O₂^–

• HO^– / H₃O⁺

What is Kw at 25 C?

• 1.0x10^-7

• 1.0x10^-14

• 1.0x10^-3

• 1.0x10^-9

If [OH-] is 3.1x10-4 M, what is [H3O+]?

• 3.2x10^-11 M

• 3.1x10^-4 M

• 5.8x10^-7 M

• 4.7x10^-3 M

The pH of a solution with [H3O+] = 4.5x10^-11 is 10.3.

• True

• False

What is the pOH of a solution with pH = 2.1?

• 3.5
• 2.1
• 4.9
• 11.9

What is the [OH-] for a solution of pH = 4.9?

• 3.6x10^-4

• 9.1x10^-10

• 7.9x10^-10

• 1.3x10^-5

What is the pH for a solution with [OH-] = 2.2x10^-15

• -0.66

• 0.66

• 13.34

• 14.66

A solution with pH = 4.2 is

• Acidic
• Basic
• Neutral

A solution with pOH = 11.6 is

• Acidic
• Basic
• Neutral

A solution with pH = 12.1 is

• Acidic
• Basic
• Neutral