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# Calculate the Concentration of Hydronium Ions

CHEM-L@611K

Calculate the concentration of hydronium $H_{3}O^{+}$ in a $0.25 \space M$ solution of $KOH$.

A

$4.0 \times 10^{-13}$

B

$4.0 \times 10^{-13}$

C

$1.0 \times 10^{-7}$

D

$2.5 \times 10^{-2}$