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Consider the following statements:
(i) | A reduction half equation contains at least one species that is being reduced and at least one electron on the left hand side of the reaction arrow. |
(ii) | A redox reaction in an electrochemical cell involves electron transfer between two species where electrons travel between two electrodes via an external electrical circuit. |
(iii) | A redox reaction where all species are in direct contact with one another does not involve electron transfer. |
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