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A 10 gm. sample of a mixture of calcium ...

A 10 gm. sample of a mixture of calcium chloride and sodium chloride is treated with `Na_2 CO_3` to precipitate the entire calcium as calcium carbonate. When `CaCO_3` is ignited 1.62 g CaO is obtained. The percentage by mass of `CaCI_2` in the original mixture is:

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The correct Answer is:
`%NaCl = 77.8%`
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