Answer:
Mass of copper produced is 19.07g
Explanation:
Let's bring out the chemical equation;
3CuCl2 + 2Al → 2AlCl3 + 3Cu
3 : 2 : 2 : 3
Upon confirming that the reaction is indeed balanced, we can proceed.
The questions asks to calculate mass of Cu formed when a mass of 5.4g of Al is being used.
From the equation, what is the relationship between Al and Cu?
2 mol of Al would react to form 3 mol of Cu
Expressing this in terms of mass, we have;
mass = no. of moles * molar mass
Mass of Aluminium = 2 * 26.98 = 53.98 g
Mass of Copper = 3 * 63.546 = 190.638g
This means;
53.98 g of Al would react to form 190.638g of Cu
So how much Cu would form from 5.4 g of Al?
This leads us to;
53.98 = 190.638
5.4 = x
Upon cross multiplication, we are left with;
x = (190.638 * 5.4) / 53.98
x = 19.07 g
Mass of copper produced is 19.07g
