Question

In a solution with a pH of 4, the [OH-] is:
A.1 x 10-10
B.4
C. 1 x 10-4
D.10
E.1 x 10-8

Answer 1

find out first H+ ions :)then H+ +OH_ = 14
if you know H+ you can find out OH_

Answer 2

okay i understand now thanks:)
(Best response
)

Answer 3

yw :)