Question

Calculate the molarity of Ca(OH)2 in the solution prepared by

dissolving its 6 g in enough water to form 500 mL of the solution?​

Answer 1

Solubility of Ca(OH)2 at 20°C = 1.73 g/L

Molar mass Ca(OH)2 = 74.05g/mol

Therefore the maximum concentration of Ca(OH)2 solution that can be prepared at 20°C = 1.73g/L * 74.05g/mol = 0.023 mol /L

Therefore attempting to calculate the mass of Ca(OH)2 in a 0.5M solution is total nonsense.