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If water contains 10 p p m of MgCl(2) an...

If water contains `10 p p m` of `MgCl_(2)` and `8p p m of CaSO_(4)` calculate the `p p m of CaCO_(3)`

Text Solution

Verified by Experts

The correct Answer is:
`16.45`
`MgCl_(2)=(10xx100)/65=10.53 p p m`
`CaSO_(4)=(8xx100)/136=5.92 p p m`
`p p m of CaCO_(3)=10.53+5.92 = 1.6 p p m`
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If water contains 10 ppm of MgCl_2 and 8 ppm of CaSO_4 , calculate the ppm of CaCO_3 .

A water sample is found to contain 96 p p m of SO_(4)^(2-) and 122 p p m of HCO_(3)^(ɵ) with Ca^(2+) ion as the only cation. a. Calculate the p p m of Ca^(2+) in water. b. Calculate the mol of CaO required to remove HCO_(3)^(ɵ) ion form 1000 kg of the water c. Calculate the concetrated of Ca^(2+) in p p m remaining in water after adding CaO .

Knowledge Check

  • Hardness of water id 200 p p m . The normality and molarity of CaCO_(3) in the water is

    A
    `2xx10^(-6) N, 2xx10^(-6) M`
    B
    `4xx10^(-2) N, 2xx10^(-2) M`
    C
    `4xx10^(-3) N, 2xx10^(-3) M`
    D
    `4xx10^(-1) N, 2xx10^(-1) M`

  • If 111 mg of CaCl_(2) and 12 mg of MgSO_(4) are present in 2L of water, what is its hardness (in gram CaCO_(3)//p p m) ?

    A
    5
    B
    10
    C
    15
    D
    203

  • If p + m = 6 and p ^(3) + m ^(3) = 72, then the value of pm is :

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    6
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    A 50 mL sample of hard water containing Ca^(2+) and Mg^(2+) ions is titrated with 50 mL. 0.005 M EDTA solution at pH=10 , using eriochrome balck -T indicator to reach equivalence point. In a equal amount of hard water sample, Mg^(2+) ions are precipated as Mg(OH)_(2) by adding suitable amount of NaOH . the solution, after precipation of Mg(OH)_(2) , is strired and then titrated with EDTA solution using calcon as indicator, and it requires 10 mL of above EDTA solution to reach equivalence point. a. Calculate the strength of Ca^(2+) and Mg^(2+) ions present in hard water. b. Calculate the hardness due to Ca^(2+) ions in p p m of CaCO_(3) . c. Calculate the hardnesss due to Mg^(2+) ions in p p m of CaCO_(3) . d. Calculate the total hardness of water in p p m of CaCO_(3) .

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