How would you test a colorless crystalline compound to determine if it was a hyd

Question

How would you test a colorless crystalline compound to determine if it was a hydrate? A sample of a crystalline compound, when heated in an open test tube, produced several droplets of water on the cool upper region of the tube. The residue dissolved in water forming a yellow-brown/solution, while the original compound formed a colorless solution in Why should you conclude that the compound is not a true hydrate? What is the meaning of the numeral represented by X is the general formula for a hydrate salt + X H_2O? Cobalt(II) chloride is commonly obtained from chemical supply houses as a hydrate with the formula CoCl_2 + 6 H_2O. An analysis showed that 25.0 g of this hydrate contains g of water. What is the percent water by weight in this hydrate? Please show your calculations below. Percent Water = _____

Explanation / Answer

Answer:

1. Record its mass, put it in a test tube and heat it with a bunsen burner. If the compound is a hydrate, the water in the compound will escape in the form of water vapor. After 5-10 minutes, take it out of the test tube and weigh it again. If the mass is now less, that means that there was water present that has now evaporated, and the compound was a hydrate.

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