Question

estimation of total hardness of given water sample using standard 0.01(M) edta solution​

Answer 1

Answer:

100 mL sample of hard water is titrated with 500 mL of 0.001 MEDTA solution at pH=10, using eriochrome black -T indicator to reach equivalence point. An equal another amount of hard water sample is boiles for 30 mi n. After filtration and cooling, the same sample is titrated with 200 mL of 0.001 M EDTA solution at pH=10 using Mg-EDTA complex solution and erichrome black -T indicator to reach equivalence point. <br> a. Calculate the total hardness of water sample (temprary +permanent) in p p m of CaCO_(3). <br> b. Calculate the permanent hardness of water sample is p p m of CaCO_(3). <br> c. Calculate the temporary hardness of water sample is p p m of CaCO_(3).

Explanation:

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