The technique used in the experiment is gravimetric analysis. Gravimetric analysis is a technique used to determine the concentration or mass of an analyte by measuring the change in the mass. One of the most frequent method used to execute gravimetric analysis is to convert the analyte into a solid by the way of using precipitation with a suitable reagent. Then, the precipitate is collected by filtration. It is then washed and dried till there is no moisture, and it will then be weighed. The quantitative amount of the analyte in the sample will then be calculated from its chemical composition and the mass of the precipitate. The advantages of using the gravimetric analysis method is that it enables very precise analysis. Moreover, it can be used to calibrate scientific instruments and it does not require expensive lab equipment to perform analysis.