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Question
Write the formula of the following compound:
Iron [III] sulphate
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Solution
Iron [III] sulphate - Fe2[SO4]3 - `"Fe"^(3+)"SO"_4^(2-)`
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Play a game for writing formula.
Example 2: A low-cost model for writing formulae: Take empty blister packs of medicines. Cut them in groups according to the valency of the element, as shown in the figure. Now, you can make formulae by fixing one type of ion into other.
For example:
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2 sodium ions can be fixed on one sulphate ion.
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Do it yourself:
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