Could you please explain what formula and step are involved and please provide (example) problem if possible:
A 40.0 mL sample of river water was titrated with 0.0010 M Na2Cr2O7 and required 8.3 mL to reach the end-point. What is the chemical oxygen demand, in milligrams of O2 per liter, of the sample?
The basis for the COD test is that most organic compounds can be fully oxidized to carbon dioxide with a strong oxidizing agent. The dichromate reacts with the excess hydrogen in the water to produce chromium and …
Titration of river water to find chemical oxygen demand.