Q 3.     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.

Answers (1)
M manish

Given that,

Mass of solute (sodium chloride) = 36 g = w_1
Mss of water (as a solvent) = 100 g = w_2

Therefore, the total mass of solution = 100  + 36 = 136 g = W

According to question, 
Concentration =  \frac{w_1}{W}\times 100
                        =\frac{36}{136}\times 100
                          =26.47 %

Hence the concentration of the solution at 293 K is 26.47%

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