MCQ
The hydrogen ion concentration of $0.001 $ $M\,\,NaOH$ solution is
  • A
    $1 \times {10^{ - 2}}\,mole/litre$
  • $1 \times {10^{ - 11}}\,mole/litre$
  • C
    $1 \times {10^{ - 14}}\,mole/litre$
  • D
    $1 \times {10^{ - 12}}\,mole/litre$

Answer

Correct option: B.
$1 \times {10^{ - 11}}\,mole/litre$
(b) $0.001\, M$ $NaOH$ means $[O{H^ - }] = {10^{ - 3}}$; $pOH = 3$

$pH + pOH = 14;\,\,pH = 14 - 3$

$pH = 11$; $[{H^ + }] = {10^{ - 11}}$ $mole-litre$$^{-1}$

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