PAG 8.3 - Electrochemical cells 3 (microscale)

In OCR Chemistry Required Practical 8 (PAG 8.3 ), a series of microscale half-cells are produced from metals and solutions of their ions. EMF values are obtained for different combinations of half-cells.

Half-cells to be tested are:

In OCR PAG 8.3: Electrochemical cells 3, normal lab practice such as wearing goggles is adequate when carrying out the practical steps.

Calculate the expected potential and compare with the measured values for each cell using:

The more negative half-cell is oxidised and the more positive half-cell reduced. Combine the half-equations to give the overall reaction, e.g.