Question

6. Using the example of calcium chloride explain how the formulae of compounds are derived
(given that the valency of calcium is 2 and that of chlorine is 1)​

Answer 1

Explanation:

1. The charge on calcium atom is 2 positive and charge on chlorine atom is 1 negative . Therefore , to balance the charge we require two atoms of chlorine to react with one atom of calcium . Also, the compound is neutral thus net charge is zero. The reaction will be as follows.

Ca2 + + 2Cl + CaCl2

2. CaCl2 Ca chlorine Valency 2 valency 1 By cross multiplication Ca Cl = CaCl2 +2 -1 In this way formula of compounds are derived .

Answer 2

Answer:

Explanation: The charge on calcium atom is 2 positive and charge on chlorine atom is 1 negative. Therefore, to balance the charge we require two atoms of chlorine to react with one atom of calcium. Also, the compound is neutral thus net charge is zero.