The indicator used for the the estimation of the organic matter or organic carbon is;_________?
Correct answer: A. Diphenylamine indicator
- A. Diphenylamine indicator
- B. Mixed indicator
- C. Both a and b
- D. None of the above
Explanation
In the Walkley-Black method, organic carbon is oxidized with potassium dichromate and the excess dichromate is titrated using diphenylamine as the indicator. A mixed indicator is not the standard indicator for this estimation.
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