The solubility of sodium chloride in water at 27 C is 22.7g in 100ml of water.The density of water is 1.0g per ml.Calculate the concentration of sodium chloride in terms of mass per cent when it is dissolved in 500 ml of water
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Density = mass/volume
density of water = 1 gm/ml
volume of water = 500 ml
mass of water = 1 X 500 gm = 500 gm
Solubility of NaCl = 22.7 gm/100 ml water.
In 500 ml water, mass of NaCl present will be
= (22.7 X 500)/100 = 113.5 gm
Therefore mass percent of NaCl = (113.5/500) X 100% = 22.7% .
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