Redox reactions 2007 VCE  

Sulfur dioxide (SO2) is a chemical of major industrial significance.
a. SO2 gas can be produced in a reaction between concentrated sulfuric acid and nickel metal. A solution
containing Ni2+ ions is also formed.
Write balanced equations for the
i. oxidation reaction
Solution
ii. reduction reaction
Solution
iii. overall reaction, showing the states of all reactants and products.
Solution

 
SO2 can also be produced in a chemical reaction between zinc sulÞ te (ZnSO3) and hydrochloric acid
according to the equation
ZnSO3(s) + 2H+(aq) → Zn2+(aq) + SO2(g) + H2O(l)
Is this reaction also a redox reaction? Explain your answer.
Solution
Which one of the following is least likely to be a product of a redox reaction between sulfuric acid and zinc metal?
A. H2
B. H2S
C. SO2
D. SO3
Solution