Question

What is the [OH-] of solution with pH of 3.4?
(A) 4 x 0.0001M
(B) 4 x 1/100000000000
(C) 2.5 x 0.0001M
(D) 2.5 x 1/100000000000

Answer 1

Answer:

(A) 4×0.0001M

Explanation:

[OH-] = 10^-3.4 which is equivalent to 4×0.0001M

Answer 2

Answer:

2.5 x 10^ -11 (D)

Explanation:

[H+] = 10^ -3.4 = 3.98 x 10^ -4

[OH-] = (1 x 10^ -14) ÷ [H+] = 2.5 x 10^ -11