Hydrogen ion concentration of an aqueous solution is `1 xx 10^(-4)M`. The solution is diluted with equal volume of water. Hydroxyl ion concentration of the resultant solution in terms of mol `dm^(-3)` is

Options

A. `2 xx 10^(-10)`
B. `0.5 xx 10^(-10)`
C. `1 xx 10^(-8)`
D. `1 xx 10^(-6)`

Answer

A

Explanation

After dilution with equal volume of water `[H^(@)] = 0.5 xx 10^(-4)M`
`rArr [OH^(-)] = (10^(-14))/(0.5 xx 10^(-4)) = 2 xx 10^(-10)` moles `dm^(3)`