Answer to Question #170830 in General Chemistry for Mayuka

Question

A solution is prepared such that [Li+ ] = 3.0 * 10-3 M while [PO4 3- ] = 2.0 * 10-3 M. If the Ksp of Li3PO4 is 2.37 * 10-11, will a precipitate form in the prepared solution? Show your complete solution. 

Answer 1

For precipitate to be present, Qip > Ksp

Qip = 3 ×10^-3 × 2 ×10^-3 = 6 × 10^-6

6 × 10^-6 > Ksp

Hence, a precipitate will be formed