Answer
$K_{ps} = 7.626 \times 10^{-9}$
Work Step by Step
1. Write the Kps formula:
$K_{ps} = [Ca^{2+}]*[F^-]^2$
$[Ca^{2+}] = 1.24 \times 10^{-3}M$
$[F^-] = 2 * 1.24 \times 10^{-3} = 2.48 \times 10^{-3}M$
2. Calculate the Kps:
$K_{ps} = [1.24 \times 10^{-3}] * [2.48 \times 10^{-3}]^2 $
$K_{ps} = [1.24 \times 10^{-3}] * [6.1504 \times 10^{-6}] $
$K_{ps} = 7.626 \times 10^{-9}$
