37. Solving a chemistry problem

1. Regarding the properties of lanthanum hydroxide, information is contradictory. According to some sources, it is a weak insoluble base, and according to others, it is a strong base, resembling calcium hydroxide in properties. Using the reference values of the solubility product of La(OH)3 and Ca(OH)2, calculate the concentration and pH of saturated solutions of these compounds and draw conclusions.