Acid-base, pH/pKa calculations

If a solution is basic which ion will be more present?

• H+
• K+
• OH-
• H-

What property do all three of these fruits have in common?

• taste bitter sweet

• have pH below 7

• turn litmus paper blue

• cannot conduct electricity

The pH scale is a range from

• 1 to 14

• 1 to 20

• 1 to 7

• 0 to 14

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

• Base
• Acid
• Buffer
• Water

An Arrhenius acid

• is a substance that releases H+ ions when dissolved in water

• is a substance that does not release any ions when dissolved in water

• is a substance that releases OH- when dissolved in water

• releases an equal amount of OH- and H+ ions when dissolved in water

Answer explanation

An Brønsted-Lowry Acid

• is a proton donor

• is a proton acceptor

• donates H+

• receives H+

Answer explanation

A solution has a pH of 7.0.  What would happen to the pH if OH ions were added?

• pH would go up
• pH would go down
• pH would stay the same
• None of these

What is the pH of an acidic solution of 0.0025M HCl

• 4.60

• 5.0

• 2.6

• 7

What is the pH of a solution where the [OH^-] is 7.30 x 10^-2 M?

• 1.14

• 2.0

• 12.9

• 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