Question

State if the solubility increases, decreases or remains the same with rise in

temperature for each of the following compounds:

(i) Calcium sulphate

(ii) Potassium nitrate

(iii) Sodium chloride​

Answer 1

1. Calcium sulfate, CaSO4, is a naturally occurring calcium salt. It is commonly known in its dihydrate form, CaSO4∙2H2O, a white or colourless powder called gypsum. As uncalcined gypsum, the sulfate is employed as a soil conditioner. Calcined gypsum is used in making tile, wallboard, lath.
2. Potassium nitrite (distinct from potassium nitrate) is the inorganic compound with the chemical formula KNO2. It is an ionic salt of potassium ions K+ and nitrite ions NO2−, which forms a white or slightly yellow, hygroscopic crystalline powder that is soluble in water.
3. 3% and 5% Sodium Chloride Injection, USP is a sterile, nonpyrogenic, hypertonic solution for fluid and electrolyte replenishment in single dose containers for intravenous administration. The pH may have been adjusted with hydrochloric acid. It contains no antimicrobial agents.

Answer 2

Answer:

Explanation:CaSo4 decreases with rise in temperature

Potassium nitrate increases with rise in temperature

Increases slightly with rise in temperature