using the formulae of calcium chloride explain how the formulae of compounds are derived.( give that the valency of calcium is 2 and of chloride is I).
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The elements in calcium chloride are calcium and chlorine. The valency of calcium is 2 and chlorine is 1. Therefore, we write the symbols as Ca2 and Cl1. ... Therefore, the formula of calcium chloride would be CaCl2
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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.
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