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Question
Write the chemical formula of the following compound in a step-by-step manner –
Potassium sulphate
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Solution
Write the formula of
| Potassium sulphate | Symbol | valency |
| Potassium | \[\ce{K}\] | \[\ce{1^+}\] |
| sulphate | \[\ce{SO4}\] | \[\ce{2^-}\] |
Step I – Write each symbol with its valency.
Positive ion is written first
\[\ce{K}^{1+}\] \[\ce{[SO4]}^{2-}\]
Step II – Interchange the valencies and ignoring signs.
The Formula is \[\ce{K2SO4}\]
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