(a) Define solubility of a substance. How does it vary with temperature?(b) What do you understand by the statement the solubility of copper sulphate in water at 20°C is 20.7 g"?(c) What is the effect of temperature on the solubility of solids in liquids?"
(a) The maximum amount of a solute that can be dissolved in 100 g of a solvent at a specified temperature is known as the solubility of that solute in that solvent.
The solubility of solids in liquids is directly proportional to temperature whereas the solubility of gases in liquids is inversely proportional to temperature.
(b) The statement " the solubility of copper sulphate in water at 20°C is 20.7 g" means that 100 g of water can dissolve a maximum of 20.7 g of copper sulphate at 20oC.
(c) The solubility of solids in liquids is directly proportional to temperature, hence, it increases on increasing the temperature and decreases on decreasing the temperature.
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