To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water at 293 K. Find its concentration at this temperature.

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We are given that 36 g of NaCl is dissolved in 100 g of water. We will use the following relation to calculate the concentration of the solution:

$m a s s space b y space m a s s percent sign space o f space a space s o l u t i o n equals fraction numerator m a s s space o f space s o l u t e over denominator m a s s space o f space s o l u t o i n end fraction cross times 100$

Mass of solute (NaCl) = 36 g

Mass of solution = Mass of solute + mass of solvent = (100 + 36) g = 136 g

Thus concentration of solution is = (36 X 100) 136

= 26.471 %

The solubility of solids in liquids increases on increase in temperature.

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