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Q.Carnallite is a double chloride of potassium and magnesium containing 38.86% of...
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Carnallite is a compound containing potassium chloride KCl, magnesium chloride `MgCl_2` and water. The percentage of water is 38.86.
0.458 g of carnallite gives 0.71 g of AgCl. 0.71 g of AgCl has `0.71*(35.45/143.32)` g of chlorine. This gives the percentage of chlorine in carnallite as `(0.71*(35.45/143.32))/0.458*100` = 38.34
2 atoms of the chloride constitute the chlorine in the molecule of `MgCl_2` and one atom of chlorine builds the KCl molecule. The mass of potassium and magnesium in carnallite is 100 - 38.34 - 38.86 = 22.8%. The percentage mass of potassium is `(130/211)*22.8` = 14.047%
Posted by justaguide on July 10, 2013 at 6:26 PM (Answer #1)
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