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Question
Write the chemical formula of the following compound in a step-by-step manner –
Potassium chloride
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Solution
Write the formula of
| Potassium chloride | Symbol | Valency |
| Potassium | \[\ce{K}\] | \[\ce1^+\] |
| Chloride | \[\ce{Cl}\] | \[\ce1^-\] |
Step I – Write each symbol with its valency.
\[\ce{K}^{1+}\] \[\ce{Cl}^{1-}\]
Positive ion is written first
Step II – Interchange the valencies
and Ignore 1 in KCl
Therefore Formula is KCl
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