Water hardness

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Terihunter's picture
Water hardness

I have tried to search for it but i am still not understanding how to work this out. I have to work out the average total hardness of water (expressed as CaCO3/L) and find the percent standard deviation. EDTA 0.005 M solution was used to titrate 50 ml aliquots of tap water using eriochrome black T as an indicator. My average volume of EDTA solution used was 9.76 mL. Howdo i work out hardness.

Arvind Singh Pundir
Arvind Singh Pundir's picture

here is attached PDF for your querry hope it solves it