(a) Give the electrolyte of a named secondary electrochemical cell. (b) Consider the cell represented...
CHEMISTRY
WAEC 1992
(a) Give the electrolyte of a named secondary electrochemical cell.
(b) Consider the cell represented as shown below: \(Cu_{(s)}Cu^{2+}_{(aq)}/Zn^{2+}_{(aq)}/Zn{(s)}\)
(i) What does the vertical double stroke represent?
(ii) Which of the metals forms the cathode?
(iii) Name the electrode to which each half-cell should be coupled if the oxidation potential of the half-cells are to be determined.
Explanation
(a)(i) Dilute tetraoxosulphate (VI) acid i.e H\(_2\)SO\(_4\);
(b)(i) Salt bridge
(ii) Copper metal is the cathode in the Zinc - Zn\(^{2+}\) voltaic cell.
(iii) Specially prepared platinum electrode over which hydrogen gas is bubbled
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