Why is it necessary to heat the unknown metal carbonate before dissolving it in water? (gravimetric analysis of a carbon kit)

It is necessary to heat the unknown metal carbonate before dissolving it in water in a Gravimetric analysis in order to dry out the unknown substance. Heating will allow the excess water in the sample to evaporate and not be included in the analysis.

Both provide approaches to confirming the result of experimentation. Repetition can be developed by one scientist or team continually achieving the expected result but replication requires an independent person or team shows thay can arrive at the same answer independently