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Study the standard electrode potentials in the table below and answer the questions that follow.

(a) Which of the metals is the strongest reducing agent?
(b) What observations will be made if a silver coin was dropped into an aqueous solution of copper (II) sulphate? Explain.

Answer Text:
(a) - Ca.
(b) - Blue colour of the solution does not change and the coin does not react. This is because silver is lower than copper in reactivity series hence cannot displace copper ions from the solution.