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6.2. Equilibrium - II (icon Equilibrium) — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry6.2. Equilibrium - II (icon Equilibrium)1 Mark
MCQ
Hydrogen ion concentration of an aqueous solution is $1 \times {10^{ - 4}}\,M$. The solution is diluted with equal volume of water. Hydroxyl ion concentration of the resultant solution in terms of $mol$ $d{m^{ - 3}}$ is
  • A
    $1 \times {10^{ - 8}}$
  • B
    $1 \times {10^{ - 6}}$
  • ✓
    $2 \times {10^{ - 10}}$
  • D
    $0.5 \times {10^{ - 10}}$
✓

Answer

Correct option: C.
$2 \times {10^{ - 10}}$
(c) $[{H^ + }] = 1 \times {10^{ - 4}}M \Rightarrow [{H^ + }]\,\,[O{H^ - }] = 1 \times {10^{ - 14}}$

$[O{H^ - }] = \frac{{1 \times {{10}^{ - 14}}}}{{0.5 \times {{10}^{ - 4}}}} = 2 \times {10^{ - 10}}$ $M$

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