pH Calculations and Molarity

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

In a test of pH levels, a baking soda has a pH of 9 and bleach has a pH of 12. What is true about there relationship?

• Both of the solution are Bases

• Both of the solution are Acids

• The Baking soda is an acid and the Bleach is a base

• The baking soda is a base and the Bleach is an Acid.

A base is a substance

• That releases OH- ions when dissolved in water

• That releases H+ ions when dissolved in water

• Does not release any ions when dissolved in water

• None of the above

The pH of a solution is 8.43. What is the [H₃O⁺]concentration?

• 3.7 x 10 ^-9

• 1.0 x 10^-8.43

• 2.7 x 10^-6

• 1.0 x 10^-14

If the [H₃O⁺] of a solution is 1 x 10^-3 M, the pH is

• 11

• -3

• 3

• 1

If the [H₃O⁺] of a solution is 6.8 x 10^-8 M, the pH is

• 7.17

• 3.2 x 10^-5

• 6.8

• 7.62

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

• 1.0 x 10^-3 M

• 1.0 x 10^-14 M

• 6.02 x 10^-23 M

• 1.0 x 10^-11 M

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

• 4.9 x 10^-10 M

• 1.0 x 10^-4 M

• 1.25 x 10^-5 M

• 7.94 x 10^-10 M