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3 August, 00:54

Suggest why CaO rather than MgO is used to dry ammonia.

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  1. 3 August, 01:22
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    Ca 2 + is less electro-positive than Mg2+. Therefore, CaO is less ionic than MgO. and in turn means that the O in CaO is more like O 2 - will react with H in H2O more so than O2 - of MgO, because it is more ionic means O is strongly bonded to Mg compare to Ca
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