Q14 of 152 Page 45

In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal. Write down the chemical equation of the reaction involved.

The chemical reaction Equation:

2AgN03 (aq.) + Cu (s) Cu(N03)2 (aq.) +2Ag (s)



More from this chapter

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12 Name two anti-oxidants which are usually added to fat and oil containing foods to prevent rancidity. 13 Write one equation each for the decomposition reactions where energy is supplied in the form of (a) heat, (b) light, and(c) electricity. 16 What type of reactions are represented by the following equations ?

(i) CaC03CaO + CO2


(ii) CaO + H2OCa(OH)2


(iii) 2FeSO4Fe2O3 + SO2 + SO3


(iv) NH4CINH3 + HCl


(v) 2Ca + O22CaO

 16 What type of chemical reactions take place when:

(a) a magnesium wire is burnt in air?


(b) lime-stone is heated?


(c) silver bromide is exposed to sunlight


(d) electricity is passed through water?


(e)ammonia and hydrogen chloride are mixed?