The solubility of a substance is typically given in grams of solute per 100 grams of solvent g/100g . For calcium chloride CaCl2 in water at 25C, the solubility is approximately 74.5 g/100g of water. This value can be found in solubility tables or charts.To determine the solubility of CaCl2 in a specific amount of water, you can use the following calculation:Solubility g = Solubility in g/100g * Amount of water in grams / 100For example, if you want to find the solubility of CaCl2 in 500 grams of water at 25C:Solubility g = 74.5 g/100g * 500g / 100Solubility g = 372.5 gSo, 372.5 grams of CaCl2 can dissolve in 500 grams of water at 25C.