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Hydrates (11.5)

Hydrates (11.5). Hydrate- compound with a specific amount of water molecules bound to it. Hydrates are often used as drying agents or desiccators because they can absorb moisture Silica gel- used in electronic equipment packaging, cat litter.

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Hydrates (11.5)

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  1. Hydrates (11.5) • Hydrate- compound with a specific amount of water molecules bound to it

  2. Hydrates are often used as drying agents or desiccators because they can absorb moisture • Silica gel- used in electronic equipment packaging, cat litter

  3. Chemicals that do not contain water in their structures are called anhydrous (without water) • Hydrates are easy to spot because their formulas show the water molecules Anhydrous cobalt (ii) chlorideCobalt (II) chloride hexahydrate CoCl2CoCl2 x 6H2O

  4. To determine hydrate formula • Determine moles of water and of anhydrous compound • Find x = moles of water moles of anhydrous compound • Plug in x Formula for compound X H2O

  5. A hydrate is found to have the following percent composition: 48.8% MgSO4 and 51.2% H2O. What is the formula of the hydrate?

  6. If 11.75 g of CuCl2 is heated, 9.25 g of anhydrous cobalt chloride remains. What is the formula for the hydrate?

  7. A mass of 2.50 g of blue hydrated CuSO4 x H2O) is placed in a crucible & heated. After heating, 1.59 g white anhydrous copper sulfate (CuSO4) remains. What is the formula?

  8. A mass of 2.50 g blue hydrated copper sulfate (CuSO4 x XH2O) is place in a crucible and heated. After heating, 1.59 g of copper sulfate remains. What is the formula for the hydrate?

  9. What is the mole ratio of the hydrate CuSO4 x ___H2O, if the anhydrous mass of CuSO4 is 25.42g and mass of water is 14.3 g?

  10. What is the mole ratio of hydrate Na2CO3 x ____ H2O, if the original mass of the hydrated Na2CO3 was 43.69 g and the mass of the anhydrous Na2CO3 is 16.19g?

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