What is the effect of heat on the following compounds? (Write equations for the reactions):
(i) Calcium Carbonate
(ii) Magnesium chloride hexahydrate
(iv) Magnesium sulphate heptahydrate
(i) Calcium carbonate on heating decomposes to produce calcium oxide (quick lime) and carbon dioxide.
O, on heating undergoes hydrolysis by its own water of crystallisation to give magnesium oxide and hyrogen chloride.
(iii) On heating to 390K, it forms a compound having the composition
which on heating above 473 K, changes into anhydrous calcium sulphate.
(iv) On heating to 423 K, it changes into monohydrate which on further heating to 473K, forms anhydrous salt.
Anhydrous salt on further heating, forms MgO.