Calculate the pH of solutions with the following hydroxide ion concentrations expressed in moles/liter.?

Question

(a) 10^-6

(b) 3 x 10^-3

(c) 10^-12

(d) 5 x 10^-4

Answer 1

pH of a substance is -log hydrogen ion concentration of this substance

but here u have the hydroxide ion concentration so u get the -log of it which will be pOH then subtract it from 14 to get the pH

For example ur first problem:

OH concentration = 10^-6  so pOH=6

so pH = 14-6= 8

do the rest by urself to learn better , u may need a calculator in the 2nd and the 4th ones.