Set up and procedure
Pure the solution in the appropriate measuring cells in the measuring cell block as shown in the diagram connect the measuring cells with filter paper strips wetted with potassium nitrate solution as shown in the diagram put covers on the measuring cells and first insert a copper electrode (copper sheet) in the dilute copper sulphate solution (measuring cell1) and a zinc electrode in the dilute zinc sulphate solution(measuring cell 2) set the measuring instrument to the measuring range 2 v and voltage type direct voltage then connect the earthed socket of the measuring instrument with the zinc electrode (negative poie ) and measure the electrical voltage of the cell.
Subsequentity repeat this procedure with the measuring cells containing 1 molar solutions (first re-position the electrodes).