Co (s) is placed into a solution containing Au + (aq). A redox reaction occurs, the products of which are Co3 + (aq) and Au (s), what is the balanced redox equation?

Question

Chemistry

Andrea Kidd

10 May, 15:44

Co (s) is placed into a solution containing Au + (aq). A redox reaction occurs, the products of which are Co3 + (aq) and Au (s), what is the balanced redox equation?

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Lucas Compton · Answer 1

The reaction described above is a single-replacement reaction as Co was able to replace Au in the solution. The redox reaction involves a process in which one agent is reduced while the other one is oxidized. The ionic equation can be expressed as,

Co (s) + Au⁺ (aq) - - > Co³⁺ (aq) + Au (s)

If we are to balance the equation such that equal number of electrons will be in both sides of the equation, this will become.

Co (s) + 3Au⁺ (aq) - - > Co³⁺ + 3Au (s)