Question

Give reasons for the following.
1. Solubility curves find utility in separation and purification of solutes.
2.Pressure and temperature influence the solubility of gases in water.
3. Heating a hydrated copper sulphate crystal is deemed a chemical change.
4. Efflorescence is minimum during humid conditions.
5. A crusty 'boiler scale' is formed in boilers, when hard water is used.​

Answer 1

Answer:

Those fractions with very low solubilities will be the first to crystallise out from the solution and will be separated out. Pressure and temperature influence the solubility of gases in water. Answer: An Increase In Pressure On The Surface Of Water Causes Increase In Solubility Of Gas In Water.