Thermal stability of Carbonates and Nitrates
Theraml decomposition is when a substance breaks down when heated.
-carbonates and nitrate ions are large and made unstable by presence of cation. Cation polarises anion distorting it. Greater distortion=less stable anion. Large cations cause less distortion than small cations so more stable the carbonate/nitrate anion down the group. Thermal stability increases.
-2MNO3(s)-> 2MNO2(s) +O2(g)
-MCO3(s)->MO(s) + CO2(g)
-2M(NO3)2(s)->2MO(s) + 4NO2(g) + O2(g)
Comments
No comments have yet been made