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Question
(a) What are the terms defined by the following?
(i) A salt containing a metal ion surrounded by other ions or molecules.
(ii) A base which is soluble in water.
(b) Making use only of substances chosen from those given below:
Dilute sulphuric acidSodium Carbonate
Zinc Sodium sulphite
Lead Calcium carbonate
Give equations for the reactions by which you could obtain :
(i) Hydrogen
(ii) Sulphur dioxide
(iii) Carbon dioxide
(iv) Zinc carbonate (two steps required)
Solution
(i) Complex salts
(ii) Alkali
(i) \[\ce{Zn + H2SO4 → ZnSO4 + H2}\]
(ii) \[\ce{Na2SO3 → Na2O + SO2}\]
(iii) \[\ce{Na2CO3 + H2SO4 → Na2SO4 + H2O + CO2)}\]
(iv) \[\ce{Zn + H2SO4 → ZnSO4 + H2}\]
\[\ce{ZnSO4 + Na2CO3 → Na2SO4 + ZnCO3}\]
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