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Hydrate Essay

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Hydrate Essay
1. A 15,67g sample of hydrate of magnesium carbonate was carefully heated, without decomposing the carbonate, to drive off the water. The mass was reduced to 7.58g.What is the formula of the hydrate? (10)
2. Construct balanced equations (including state symbols) to describe the following reaction: Potassium metal reacts with water to form potassium hydroxide solution and hydrogen gas (dihydrogen). (8)
3. Anhydrous lithium perchlorate (4.78g) was dissolved in water and recrystallized. Care was taken to isolate all the lithium perchlorate as its hydrate. The mass of the hydrated salt obtained was 7.21g.What hydrate is it? (7)
4. Define a hydrated compound? (3)
5. Write the ions that are produced when the following substances dissolve. (6)
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