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Problems based on solubility:-
The solubility of sodium nitrate at 50°C and 30°C is 114 g and 96 g, respectively. Find the amount of salt that will be thrown out when a saturated solution of sodium nitrate-containing 50 g of water is cooled from 50°C to 30°C?
Given:
Amount of sodium nitrate dissolved in 100 g of water at 50°C is 114g.
Formula:
The solubility is expressed mathematically as
Solubility = / x 100.
∴ Amount of sodium nitrate dissolved in 50g of water at 50°C = × / 100.
Solubility of sodium nitrate dissolved in 50g of water at 50°C = g.
Similarly, amount of sodium nitrate dissolving in 50g of water at 30°C = / x 100.
Solubility of sodium nitrate dissolved in 50g of water at 30°C = g.
Hence, the amount of sodium nitrate thrown when 50g of water is cooled from 50°C to 30°C = = g.
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