Question

For water at 25° C, 2 x 10-7 moles per litre is
the correct answer for which one of the followoing
(1) (H+) + (OH)
(2) (H+)^2
(3) (OH-)^2
(4) [H+] - [OH-]
plz answer with an explanation..​

Answer 1

Answer:

At 25oC, For pure water

Concentration of [H+]=10−7 moles per litre

Concentration of [−OH]=10−7 moles per litre

as pH=pOH=7

Thus [H+]+[−OH]=10−7+10−7=2×10−7moles/L