Answer :

a) The precipitate will form first in experiment-1 because of increasing the temperature the energy as well as the speed of molecules increases. As a result of the number of molecules undergoing effective collisions increases. So the reactant molecules will react more easily. Hence the rate of reaction will increase.

b) Na2S2O3(aq) + 2HCl(aq) 2NaCl(aq) + H2O(l) + SO2(g) + S(s)

Note- In balanced equation, the number of atoms of an element will be same on both side of reaction.

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The experimKerala Board Chemistry Part I

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