We’re being asked to calculate the molarity (M) of ammonium chloride (NH4Cl) in a solution. Recall that molarity is the ratio of the moles of solute and the volume of solution (in liters). In other words:
We first need to determine the number of moles of NH4Cl.
To find the moles of NH4Cl, we’ll need its molar mass. The molar mass of NH4Cl is:
NH4Cl 1 N × 14.01 g/mol C = 14.01 g/mol
4 H × 1.01 g/mol H = 4.04 g/mol
1 Cl × 35.45 g/mol O = 35.45 g/mol
Sum = 52.5 g/mol
Ammonium chloride, NH4Cl, is a very soluble salt in water.
If you dissolve 16 g of ammonium chloride in 500.0 mL of water, what is the molar concentration of the solution?
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