How many grams of chlorine gas can be produced from the electrolytic decomposition of 868 g of CaCl?

Answer 1

Step 1: Write a balanced equation:
2CaCl -> 2Ca + Cl2

Step 2: Find molar masses:
Ca = 40.078 g/mol
Cl = 35.453 g/mol
CaCl = 75.531 g/mol

868 g CaCl / 75.531 g/mol = 11.49197 moles CaCl

2 moles CaCl decomposes to create 1 mol of Cl2, which has 2 moles of Cl.
Thus, 1 mole of Cl is released when 1 mole of CaCl decomposes.

11.49197 moles Cl * 35.453 g/mol = 407.4248 g Cl2 (solution!)