2023 ~ pH Review

Which of these 1 M solutions will have the highest pH?

• NaOH

• HCl

• CH₃OH

• NaCl

Given the following solutions:

Solution A: pH of 10

Solution B: pH of 7

Solution C: pH of 5

Which list has the solutions placed in order of increasing H+ concentration?

• A, B, C

• C, A, B

• B, A, C

• C, B, A

When the pH of a solution changes from a pH of 5

to a pH of 3, the hydronium ion concentration is

• 0.01 of the original content

• 0.1 of the original content

• 10 times the original content

• 100 times the original content

Which of these pH numbers indicates the highest level of acidity?

• 5

• 10

• 8

• 12

Which pH indicates a basic solution?

• 1

• 5

• 12

• 7

Which pH change represents a hundredfold increase in the concentration of H₃O⁺?

• pH 5 to pH 7

• pH 13 to pH 14

• pH 3 to pH 1

• pH 4 to pH 3

Solution A has a pH of 3 and solution Z has a pH of 6. How many times greater is the hydronium ion concentration in solution A than the hydronium ion concentration in solution Z?

• 100

• 3

• 2

• 1000

As the pH of a solution is changed from 3 to 6, the concentration of hydronium ions

• increases by a factor of 3

• increases by a factor of 1000

• decreases by a factor of 3

• decreases by a factor of 1000

What is the pH of a solution that has a hydronium ion concentration 100 times greater than a solution with a pH of 4?

• 5

• 3

• 2

• 6

The pH of an aqueous solution changes from 4 to 3 when the hydrogen ion concentration in the solution is

• decreased by a factor of 3/4

• decreased by a factor of 10

• increased by a factor of 4/3

• increased by a factor of 10