The 5-Second Trick For chemical oxygen demand
During the existence of sulfuric acid, silver sulphate, and mercury sulphate, potassium dichromate oxidises the organic and natural issue contained from the h2o sample to provide carbon dioxide (CO2) and h2o (H2O). The amount of potassium dichromate utilised is set by comparing the volumes of ferrous ammonium sulphate eaten in the course of blank a