Worksheet: Water of Crystallization
In this worksheet, we will practice defining water of crystallization and explaining its effect on the structures, stabilities, and properties of crystals.
How many molecules of water are there per unit of aluminum hydroxide in ?
A sample of magnesium sulfate hydrate is heated until its mass remains constant. For every mole of , 7 moles of water are liberated. What is the value of ?
A sample of cobalt(II) chloride hydrate is heated until its mass remains constant. For every 1.00 g of cobalt(II) chloride produced, 0.831 g of water is liberated. What is the value of , where is an integer?
Copper(II) sulfate hydrate has the molecular formula , where is a whole number. A 3.13 g sample of this compound is heated until its mass remains constant at 2.00 g. Calculate the value of .
The diagram below shows a piece of equipment called a desiccator that is used to keep substances in a dry atmosphere. Why is the bottom of the desiccator lined with anhydrous calcium chloride?
- ACalcium chloride is very efflorescent and will easily keep the air inside the desiccator moist.
- BCalcium chloride is very hygroscopic and will easily remove any moisture from the air inside the desiccator.
- CCalcium chloride is very good at absorbing carbon dioxide from the air inside the desiccator.
- DCalcium chloride is inert and will not react with the sample in the desiccator.
- ECalcium chloride ensures the pH is kept neutral.
What name is given to a crystal that does not contain any water of crystallization?
What name is given to a crystal that contains water of crystallization?