The pH Scale - Regents Chemistry

A hydrogen ion, H⁺, in aqueous solution may also be written as

• OH^-

• H₂O

• H₃O⁺

• H₂O₂

Tags

NGSS.HS-ESS2-5

Which pH indicates a basic solution?

• 1

• 5

• 7

• 12

The table shows the molar concentrations of hydronium ions in four different solutions. Which solution has the highest pH?

(Hint: First, decide if the solution is acidic or basic. Then, decide if the solution would have the highest or lowest concentration of H₃O⁺.)

• A

• B

• C

• D

Which relationship is present in a solution that has a pH of 6?

• [H₃O⁺] = [OH^-]

• [H₃O⁺] > [OH^-]

• [H₃O⁺] < [OH^-]

• [H₃O⁺] + [OH^-] = 7

A solution with a pH of 4.0 has a hydronium ion concentration a thousand times greater than a solution with a pH of

• 1.0

• 2.0

• 6.0

• 7.0

Compared to a solution with a pH value of 8, a solution with a hundred times lower hydronium ion concentration has a pH value of

• 6

• 7

• 9

• 10

As the pH of a solution changes from 3 to 4, the concentration of hydronium ions

• decreases by a factor of 1

• decreases by a factor of 10

• increases by a factor of 10

• increases by a factor of 1

As the pH of a solution is changed from 13 to 11, the concentration of hydronium ions

• decreases by a factor of 100

• decreases by a factor of 20

• increases by a factor of 20

• increases by a factor of 100

Which relationship is present in a solution that has a pH of 10?

• [H₃O⁺] = [OH^-]

• [H₃O⁺] > [OH^-]

• [H₃O⁺] < [OH^-]

• [H₃O⁺] + [OH^-] = 7

Which relationship is present in a solution that has a pH of 7?

• [H₃O⁺] = [OH^-]

• [H₃O⁺] > [OH^-]

• [H₃O⁺] < [OH^-]

• [H₃O⁺] + [OH^-] = 7