Why is Li2CO3 decomposed at a lower temperature whereas Na2CO3 at higher temperature?

Asked by Pragya Singh | 1 year ago |  60

##### Solution :-

The electropositive character increases while moving down in the group of alkali metal which results in an increase in stability of alkali carbonates. Generally, lithium carbonate is not stable when it reacts to heat because lithium carbonate is covalent. Due to the smaller size of lithium ion it polarizes large carbonate ion which results in the formation of stable lithium oxide.

$$Li_{2}CO_{3}\rightarrow Li_{2}O+CO_{2}$$

This is why sodium carbonate decomposes at high temperature and lithium carbonate decomposes at low temperature.

Answered by Abhisek | 1 year ago

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