The mass of calcium hydroxide that is dissolved in 175 mL of a saturated solution is _____ grams.

Answer 1

Ca(OH)₂ is only slightly soluble in water (0.16g Ca(OH)₂/100g water at 20°C) forming a basic solution called lime water. The solubility decreases with increasing temperature. The suspension of calcium hydroxide particles in water is called milk of lime.

Given that the solubility of calcium hydroxide is 0.16 grams per 100 grams of water,

and assuming that the solution's mass is predominantly due to the water (which is a common assumption since the solute's mass is relatively small), you can still use the 175 grams of the solution as an approximation for the mass of water to find out how much Ca(OH)2 is dissolved.

Mass of Ca(OH)2 = 0.16 / 100 = x / 175

x= 0.28 (g)

So, the mass of calcium hydroxide dissolved in 175 grams of a saturated solution is approximately 0.28 grams.