Why Li2CO3 decomposes at a lower temperature whereas Na2CO3 at higher temperature ?

Why Li2CO3 decomposes at a lower temperature whereas Na2CO3 at higher temperature ?
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Ans.Li2CO3 is a salt of a weak acid (CO2) and a weak base (LiOH). Since the weak base cannot attract CO2 Strongly, therefore, Li2CO3 decomposes at a lower temperature.On the other hand ,NaOH is a Much stronger base than LiOH and hence can attract CO2 more strongly.
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