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
ii. reduction reaction
iii. overall reaction, showing the states of all reactants and products.

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.
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