Question

In: Chemistry

7.50 g of NH4Cl is added to 16.6 g of water. Calculate the molality of the...

7.50 g of NH4Cl is added to 16.6 g of water. Calculate the molality of the solution.
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Solutions

Expert Solution

Given mass of NH4Cl is , m = 7.50 g

Mass of water , W = 16.6 g = 0.0166 Kg

Molar mass of NH4Cl is = sum of the atomic masses

                                   = atomic mass of N + (4 x atomic mass of H) + atomic mass of Cl

                                  = 14 +(4x 1 ) + 35.5

                                 = 53.5 g mol-1

We know that molarity ,

                                 


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