At 20°c, a 0.376 m aqueous solution of ammonium chloride has a density of 1.0045 g/ml. The mass percent of the ammonium chloride in the solution is 2.003%.
The number of moles of a substance can be estimated as:
Given that:
- number of moles = 0.376 M
- molar mass of ammonium chloride = 53.50 g/ml
Mass = number of moles × molar mass
Mass = 0.376 × 53.50
Mass = 20.116 grams
In one mL of ammonium chloride; the grams of ammonium chloride is:
= 0.020116 g/mL
The mass of ammonium chloride in the solution can be computed as:
= 2.003%
Therefore, we can conclude that the mass percent of the ammonium chloride in the solution is 2.003%.
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