Question

In: Chemistry

In acidic solution, the sulfate ion can be used to react with a number of metal...

In acidic solution, the sulfate ion can be used to react with a number of metal ions. One such reaction is

SO42−(aq)+Sn2+(aq)→H2SO3(aq)+Sn4+(aq)

Since this reaction takes place in acidic solution, H2O(l) and H+(aq) will be involved in the reaction. Places for these species are indicated by the blanks in the following restatement of the equation:

SO42−(aq)+Sn2+(aq)+     −−−→H2SO3(aq)+Sn4+(aq)+     −−−

What are the coefficients of the reactants and products in the balanced equation above? Remember to include H2O(l) and H+(aq) in the appropriate blanks. Your answer should have six terms.

Enter the equation coefficients in order separated by commas (e.g., 2,2,1,4,4,3). Include coefficients of 1, as required, for grading purposes.

Solutions

Expert Solution

SO4{2-}(aq) + Sn{2+}(aq) + 4 H{+} = H2SO3(aq) + Sn{4+}(aq) + H2O

Reaction stoichiometry

Compound

Coefficient

Molar Mass

SO4{2-}(aq)

1

96.063697159819

Sn{2+}(aq)

1

118.70890284018

H{+}

4

1.0073914200905

H2SO3(aq)

1

82.07908

Sn{4+}(aq)

1

118.70780568036

H2O

1

18.01528


SO4 2- (aq)+ Sn 2+ (aq) --> H2SO3 (aq) + Sn 4+ (aq)

begin by separating into two pieces


So4 2- (aq) --> H2SO3 (aq)


then balance the S (which is already balanced)


after, balance the O by adding H2O where needed

SO4 2- (aq) --> H2SO3 (aq) + H2O (l)

now that the Oxygens are balanced, balance out the Hydrogens by adding H+ wherever needed.

4H+ (aq) + SO4 2- (aq) --> H2SO3 (aq) + H2O (l)


4e- + 4H+ (aq) + SO4 2- (aq) --> H2SO3 (aq) + H2O (l)


Sn 2+ (aq) --> Sn 4+ (aq)


all you need to do for this equation is add electrons to balance out the charge

Sn 2+ (aq) --> Sn 4+ (aq) + 2e-

now, if you multiply the second equation by 2 the electrons will end up cancelling out

4e- + 4H+ (aq) + SO4 2- (aq) --> H2SO3 (aq) + H2O (l)


+ 2Sn 2+ (aq) --> 2 Sn 4+ (aq) + 4 e-

if you add the two together then you get the balanced equation
4H+ (aq) + SO4 2- (aq) + 2Sn 2+ (aq) --> H2SO3 (aq) + 2Sn 4+ (aq) + H2O (l)


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