Balance the electrons

Using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 pb+2(aq) + 2cl -(aq). if the value of ksp was determined to be only 1.2 x 10-2: too much solid has dissolved. additional precipitate is forming. the solution is unsaturated. the ions are now combining to reduce their concentrations.

What is the percent by mass of oxygen in fe2o3

Concentrations expressed as a percent by mass are useful when the solute is a a. liquid b. gas c. solid