`Li_(2)CO_(3)` is a salt of a weak acid `(CO_(2))` with a weak base `(LiOH)`. Since the weak base cannot attract `CO_(2)` strongly , therefore , `Li_(2)CO_(3)` decomposes at lower temperature . On the other hand , NaOH is a much stronger basea than LiOH and hence can attract `CO_(2)` more strongly . Therefore , `Na_(2)CO_(3)` is much more stable than `Li_(2)CO_(3)` and hence decomposes at much higher temperature than `Li_(2)CO_(3)` .
