Question

Calculate the solubility in \(\text{mol dm}^{-3}\) of sparingly soluble salt BaBr if its solubility product is \(4.9 \times 10^{-13}\) at the same temperature.

• A. \(7 \times 10^{-7}\)
• B. \(7.5 \times 10^{-7}\)
• C. \(8 \times 10^{-7}\)
• D. \(4.9 \times 10^{-7}\)

Hint:

For \(1:1\) sparingly soluble salts: \[ K_{sp} = s^2 \] For \(1:2\) salts like \(CaF_2\): \[ K_{sp} = 4s^3 \] Always remember to adjust the expression according to ionic stoichiometry.

Answer 1

The Correct Option is A