Question

Calculate the concentration of OH - ions in a 4.0 10-3 M HCl solution.

Answer 1

HCL<---> H+ + Cl-
pH=-log
[H+]
pH=2.3979=2.4
pOH=14-2.4=11.6
pOH=-log[OH-]
[OH-]=2.5 x10-12