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    Question

    Water analysis of a bore well reports as under

    CO32- : 1.2 mel-1 HCO32- : 4.0 mel-1 Ca2+: 2.6 mel-1 Mg2+: 1.5 mel-1 Calculate the RSC (residual sodium carbonate) in the bore well water
    A 3.9 mel^-1 Correct Answer Incorrect Answer
    B 3.3 mel^-1 Correct Answer Incorrect Answer
    C 1.7 mel^-1 Correct Answer Incorrect Answer
    D 1.1 me/l Correct Answer Incorrect Answer

    Solution

    RSC = [HCO3 + CO3] − [Ca + Mg]= (1.2+4.0)-(2.6+1.5)                             5.2-4.1=1.1 me/l

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