Question

The hydrogen ion concentration of 0.001 M NaOH solution is
A. `1 xx 10^(-2)` mole/litre
B. `1 xx 10^(-11)` mole/litre
C. `1 xx 10^(-14)` mole/litre
D. `1 xx 10^(-12)` mole/litre

Answer 1

Correct Answer - B
0.001 M NaOH means `[OH^(-)] = 10^(-3) , pOH = 3`
`pH + pOH = 14, pH = 14-3`
`pH = 11, [H^(+)] = 10^(-11) "mole-litre"^(-1)`.