One litre of a sample of hard water cont...

One litre of a sample of hard water contain `4.44mg CaCl_(2) and 1.9mg "of" MgCl_(2)`. What is the total hardness in terms of ppm of `CaCO_(3)?`

2 ppm

3 ppm

4 ppm

5.12 ppm

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One litre of sample of hard water contain 4.44mg CaCI_2 and 1.9mg of MgCI_2 . What is the total hardness in terms of ppm of CaCO_3 ?

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Solution of 100 ml water contains 0.73 g of Mg(HCO_(3))_(2) and 0.81g of Ca(HCO_(3))_(2) calculate the hardness in terms of ppm of CaCO_(3)

A sample of hard water contains 1 mg CaCl_2 and 1 mg MgCl_2 per litre. Calculate the hardness of water in terms of CaCO_3 present in per 10^(6) parts of water. (a). 2.5 ppm (b). 1.95 ppm (c). 2.15 ppm (d). 195 ppm

A sample of hard water contains 1 mg CaCl_2 and 1 mg MgCl_2 per litre. Calculate the hardness of water in terms of CaCO_3 present in per 10^(6) parts of water.

A sample of hard water is found to contain 50mg of CaSO_4 in 12kg of sample.Calculate the hardness of the sample in terms of ppm of CaSO_4 .

Washing soda ( Na_2CO_(3).10H_2O ) is widely used in softening of hard water. If 1L of hard water requires 0.0143g of washing soda, what is hardness of water in terms of p p m of CaCO_3 ?

0.0093 g of Na_(2)H_(2)EDTA.2H_(2)O is dissolved in 250 mL of aqueous solution. A sample of hard water containing Ca^(2+) and Mg^(2+) ions is titrated with the above EDTA solution using a buffer of NH_(4)OH+NH_(4)Cl using eriochrome balck- T as indicator. 10 mL of the above EDTA solution requires 10 mL of hard water at equivalent point. another sample of hard water is titrated with 10 mL of above EDTA solution using KOH solution (pH=12) . using murexide indicator, it requires 40 mL of hard water at equivalence point. a. Calculate the ammount of Ca^(2+) and Mg^(2+) present in 1L of hard water. b. Calculate the hardness due to Ca^(2+) , mG^(2+) ions and the total hardness of water in p p m of CaCO_(3) . (Given MW(EDTA sal t)=372 g mol^(-1),MW(CaCO_(3))=100 gmol^(-1) )

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