Question

For the redox reaction, $HgC{l}_2+SnC{l}_2\to 2Hg+SnC{l}_4$, the correct coefficients of reactants for the balanced equation are____________.

• A. $1,1$
• B. $1,2$
• C. $2,2$
• D. $2,1$

Answer 1

Answer: (C)

$2,2$

Reaction can also written as follows:

${Hg}^{+2}+{Sn}^{+2}\to Hg+{Sn}^{+4}$

Half reactions are written as:

${Hg}^{2+}+e^{-}\to Hg{Sn}^{+2}\to {Sn}^{+4}+2e^{-}$

Now add both the reactions, we will get

${Hg}^{2+}+{Sn}^{+2}\to {Sn}^{+4}+Hg$

So 1,1 is correct answer.