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4. Write the oxidation and reduction half-reactions and determine the standard cell

potential (Eº) for the following equation as written: (4 marks)

Sns) + 2HBr (aq)

SnBr2(aq) + H₂(g)

Decide whether the equation represents a spontaneous or a nonspontaneous reaction at

standard conditions. Explain your reasoning. (2 marks)

Fig: 1