Determine the pH of the solution that results from the addition of 20.00 mL of 0.01 M Ca `(OH)_(2)` to 30.00 mL of 0.01 M HCI

Options

A. `11.30`
B. `10.53`
C. `2.70`
D. `8.35`

Answer

A

Explanation

Milimoles of `H^(+) = 30 xx 0.01 = 0.3`
Milimoles of `OH^(-) = 20 xx 0.01 xx 2 = 0.4`
`[OH^(-)]= (0.1)/50 or 2 xx 10^(-3)`
So , pOH = `2.6999 rArr pH = 2.6999 = 11.30 `