In experiment used a coulometric titration ,coulometric is a technique for analyzing chemical electrochemical method by the cell electrolyte there will be provided energy from external into the cell and must be a direct current. This technique involves measuring the amount of electric charge (electrons) that cause a change in oxidation of the sample. Thus, the volume of the sample relative to the amount of electric charge it all to the cells .In analysis need to stirring solution constantly to lead ion reaction at the working electrode.This analysis technique need to it relies on the relationship between the amount of the electric charge and the equivalent grams of sample