# A 0.755-g sample of hydrated copper(II) sulfate (CuSO_4 \cdot xH_2O) was heated carefully until...

## Question:

A 0.755-g sample of hydrated copper(II) sulfate {eq}(CuSO_4\cdot xH_2O) {/eq} was heated carefully until it had changed completely to anhydrous copper(II) sulfate ({eq}CuSO_4 {/eq}) with a mass of 0.483 g. Determine the value of x. (This number is called the "number of waters of hydration" of copper(II) sulfate. It specifies the number of water molecules per formula unit of {eq}CuSO_4 {/eq} in the hydrated crystal.)

## Hydrates

Ionic compounds that contain water in their structure via hydrogen bonding are called hydrates. The number of moles of salt and the number of moles of water in a hydrate occurs in whole number ratios.

## Answer and Explanation: 1

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View this answerWhen hydrated copper(II) sulfate is heated, water is removed from the hydrate as water vapor and an anhydrous form of the salt is produced.

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Chapter 9 / Lesson 8Learn the anhydrate definition and what a hydrated compound is. Understand what an anhydrate is, the hydrate formula, and how to find the formula of the hydrate.

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