Hydrated substances contain H2O as part of their formulas. When a hydrated substance is heated, water is driven off and an anhydrous (without water) substance is formed. In this experiment: determine the formula of 2 different hydrates: A copper (II) sulfate hydrate and a zinc sulfate hydrate 1) Why did the color of the cobalt (II) chloride change? 2) What would you expect to happen to the color of the anhydrous (without water) sample if it was removed from the heat and left in an open container in the lab? 3) One way to tell if all of the water has been removed for this compound is to wait until the color stops changing, but not all hydrates change color when they are dehydrated. What would be another way to
Hydrated substances contain H2O as part of their formulas. When a hydrated substance is heated,
water is driven off and an anhydrous (without water) substance is formed. In this experiment: determine the formula of 2 different hydrates: A copper (II) sulfate hydrate and a zinc sulfate hydrate
1) Why did the color of the cobalt (II) chloride change?
2) What would you expect to happen to the color of the anhydrous (without water) sample if it was removed from the heat and left in an open container in the lab?
3) One way to tell if all of the water has been removed for this compound is to wait until the color stops changing, but not all hydrates change color when they are dehydrated. What would be another way to tell if all of the water has been removed from a sample?
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