you were analyzing a sample of a mixture of salt, sand, and ammonium chloride. H

Question

you were analyzing a sample of a mixture of salt, sand, and ammonium chloride. However, you made a mistake and did not dry the empty evaporating dish before taking the mass, 86.214g, and then adding your unknown mixture to wet dish, now 88.425g total. This extra moisture was removed when you heated to remove the ammonium chloride. After heating the total mass was 87.867g. How would this error affect the calculated percentage of ammonium chloride as compared to the true value? (too high, too low, or unchanged), and briefly explain

Explanation / Answer

As given in the question, the extra moisture was not removed before heating ammonium chloride to sublimation. Althoughit was removed after heating. The weight of wet dish included the weight from moisture too. Hence, the percentage from Ammonium chloride will be high as compared to the true value.

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