`RH_2` (ion exchange resin) can replace `Ca^(2+)` ions in hard water as `RH_2+Ca^(2+)rarr RCa+2H^+`. If 1 L of hard water after passing through `RH_2` has `pH=3` then hardness in parts per million of `Ca^(2+)` is :

RH_(2) (ion exchange resin) can replace Ca^(2+) ions in hard water as RH_(2)+Ca^(2+) to RCa+2H^(+) . If L of hard water after passing through RH_(2) has pH=3 then hardness in parts per million of Ca^(2+) is :

RH_(2) ( ion exchange resin) can replace Ca^(2+) d in hard water as. RH_(2)+Ca^(2+)rarrRCa+2H^(+) 1 "litre" of hard water passing through RH_(2) has pH2 . Hence hardness in pp m "of" Ca^(2+) is:

In reference to biological role, Ca^(2+) ions are important in

Name the compound used for measuring the hardness of water, i.e., for estimation of Ca^(2+) and Mg^(2+) ions.

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 ?

Washing soda (Na_(2)CO_(3).10H_(2)O) is widely used in softening of hard waer. If 1 L of hard water requires 0.0286 g of washing soda, the hardness of CaCO_(3) in ppm is

Hard water when passed through ion exchange resin containing RCOOH group, becomes free from

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 ?

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) )

A : Temporary hardness is due to HCO_(3)^(-) ions. R : permanent hardness is due to CaCl_(2)