If the ph of a solution is increased from ph 5 to ph 7, it means that the

a. Concentration of h + is twice (2x) what it was at ph 5.

b. Concentration of h + is one-half (1/2) what it was at ph 5.

c. Concentration of oh - is 100 times greater than what it was at ph 5. Selected:

d. Concentration of oh - is one-hundredth (0.01x) what it was at ph 5. This answer is incorrect.

e. Concentration of h + is 100 times greater and the concentration of oh - is one-hundredth what they were at ph 5.

Question

Marco Mccullough

Chemistry

25 July, 00:04

If the ph of a solution is increased from ph 5 to ph 7, it means that the

a. Concentration of h + is twice (2x) what it was at ph 5.

b. Concentration of h + is one-half (1/2) what it was at ph 5.

c. Concentration of oh - is 100 times greater than what it was at ph 5. Selected:

d. Concentration of oh - is one-hundredth (0.01x) what it was at ph 5. This answer is incorrect.

e. Concentration of h + is 100 times greater and the concentration of oh - is one-hundredth what they were at ph 5.

+1

Answers (1)

Know the Answer?

Antoine Guerra · Answer 1

Answer is: Concentration of OH⁻ is 100 times greater than what it was at pH 5.

When pH is below 7, solution is acidic, pH greater that 7 solution is basic and pH equals to 7, solution is neutral.

pH + pOH = 14.

pOH₁ = 14 - 5 = 9; first solution.

pOH₂ = 14 - 7 = 7; second solution.

pOH = - log[OH⁻].

[OH⁻]₁ = 10⁻⁹ M, measure of hydroxide ion (OH⁻) concentration of first solution.

[OH⁻]₂ = 10⁻⁷ M, measure of hydroxide ion (OH⁻) concentration of second solution.

[OH⁻]₂ / [OH⁻]₁ = 10⁻⁷ M / 10⁻⁹ M.

[OH⁻]₂ / [OH⁻]₁ = 100.