Calculate the volume of chlorine required to displace all the bromine from a solution containing

Calculate the volume of chlorine required to displace all the bromine from a solution containing 10.3 g of sodium bromide.

Given:
m (NaBr) = 10.3 g

To find:
V (Cl2) -?

1) Cl2 + 2NaBr => 2NaCl + Br2;
2) n (NaBr) = m / M = 10.3 / 103 = 0.1 mol;
3) n (Cl2) = n (NaBr) / 2 = 0.1 / 2 = 0.05 mol;
4) V (Cl2) = n * Vm = 0.05 * 22.4 = 1.12 liters.

Answer: The volume of Cl2 is 1.12 liters.