Devise cells in which the following are the reactions and calculate the standard

Question

Devise cells in which the following are the reactions and calculate the standard cell potential in each case: (a) 2 Na(s) + 2 H2O(l) --> 2 NaOH(aq) + H2(g) (b) H2(g) + I2(s) --> 2 HI(aq) (c) H3O+ (aq) + OH?(aq) --> 2 H2O(l)

Explanation / Answer

for (A) 2 Na(s) + 2H+ ion --> 2 Na+ (ion) + H2(g) so we get the cells as Na(s)| Na+ (ion)|| 2H+ | H2(g) for (B) H2(g) + I2(s) --> 2 HI(aq) => H2(g) + I2(s) --> 2H+ 2I-(aq) => H2(g)|2H+ || I2(s) |2I-(aq) for c) H3O+ (aq) + OH-(aq) --> 2 H2O(l) H3O+ (aq) + OH-(aq) --> H2O(l) +H2O (l) => H3O+ (aq)|H20 || OH-(aq)| H2O(l)

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