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Question

Calcium chloride when dissolved in water dissociates into its ions according to the following equation.

CaCl2 (aq) Ca2+ (aq) + 2Cl(aq) Calculate the number of ions obtained from CaCl2 when 222 g of it is

dissolved in water.

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Solution

CaCl2(aq) Ca2+(aq) + 2Cl(aq)

Mol. Wt. 111

Number of ions = 3

111 gm of CaCl2 = 3 ions

222 gm of CaCl2 = = 6 ions


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