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_________ drops of indicator is used in the EDTA method.(a) 1 to 2 drops(b) 2 to 3 drops(c) 2 to 4 drops(d) 5 to 8 dropsThis question was posed to me during an interview for a job.This question is from Estimation of Hardness topic in portion Water of Applied Chemistry

Answer» RIGHT OPTION is (a) 1 to 2 drops

The EXPLANATION: 1 to 2 drops of the indicator is used in the EDTA method. 0.5gms of the dye is DISSOLVED into the 100ml of alcohol and the indicator of two to THREE drops is added.


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