Topical Questions
These questions are keyed to the major topics in the chapter. Usually a question that is answered at the back of this book is paired with a similar one that is not.
The alum used in cooking is potassium aluminum sulfate hydrate, KAl(SO4)2 .x H2O. To find the value of x, you can heat a sample of the compound to drive off all the water and leave only KAl(SO4)2. Assume that you heat 4.74 g of the hydrated compound and that it loses 2.16 g water. What is the value of x?
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