What types of rocks must form near earth's surface?

Find the protons, electrons and neutrons for strontium with a mass of 83

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.

Consider this initial-rate data at a certain temperature for the reaction described by