Ionic EquilibriumMedium
Question
The hydronium ion concentration in an aqueous solution of H2SO4 is 2.0 × 10−4 M at 25o C. The hydroxide ion concentration in the solution is
Options
A.0
B.2.0 × 10−4 M
C.5 × 103 M
D.5 × 10−11 M
Solution
$\left\lbrack OH^{-} \right\rbrack = \frac{K_{w}}{\left\lbrack H_{3}O^{+} \right\rbrack} = \frac{10^{- 14}}{2 \times 10^{- 4}} = 5 \times 10^{- 11}\text{ M}$
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