Which of the carbonates given below is unstable in air and is kept in CO2 atmosphere to avoid decomposition.
Which of the carbonates given below is unstable in air and is kept in CO2 atmosphere to avoid decomposition.
(i) BeCO3
(ii) MgCO3
(iii) CaCO3
(iv) BaCO3
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(i) Due to least electropositive character or least basicity of Be, BeCO3 is less stable and hence decomposes to give BeO and CO2.
BeCO3 → BeO + CO2
Since the decomposition reaction is reversible, therefore, to increase the stability of BeCO3or to reverse the above equilibrium, BeCO3 is kept in an atmosphere of CO2.
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