Question

2.A sample of AlCl 3 contains 5.4x10 24 Cl - ions.Calculate: (03)
a) Number of formula units of AlCl 3
b) Number of Al +3 ions in the sample
c) Mass of the sample

Answer 1

Answer:

Divide the mass of the dissolved compound by its molar mass to calculate the number of moles. In our example, this would be: Number of moles (NaNO3)=21.9g /85 g/mole= 0.258 moles. Divide the number of moles by the solution volume in liters to calculate solubility in mole/L.