Question

In an experiment to determine the solubility of solid W in water at 400c, the following results were obtained.

• Mass of empty evaporating dish = 36.2g
• Mass of evaporating dish + saturated solution = 52.4g.
• Mass of evaporating dish + dry solid W = 40.4g
  Use this data to calculate the solubility of W at 400C .

Answer 1

Mass of saturated solution = 52.4 - 36.2 = 16.2 g 

Mass of solid W = 40.4 – 36.2 = 4.2g

Mass of water = 16.2 – 4.2 = 12g 

Solubility of solid W at 400c = ^{(4.2 x 100)}/₁₂ =  35g/100g of water