1.21 understand how the formulae of simple compounds can be obtained experimentally, including metal oxides, water and salts containing water of crystallisation

1.21 •1. Find the mass of the multiple compounds.

        •2. Calculate the moles of water lost - mass / Mr.

        •3. Calculate the moles of anhydrous salt made. That is mass / Mr.

        •4. Work out ratio of anhydrous and water. Must be an integer 

                 •the percentage of water is water/metal x 100