The degree of hardness of a given sample of hard water is 40 ppm. If the entire hardness in due to `MgSO_(4)` , how much of `MgSO_(4)` is present per kg of water ?

The degree of hardness of a given sample of hard water is 40 ppm. If t

1.	The degree of hardness of a given sample of hard water is 40 ppm. If the entire hardness in due to `MgSO_(4)` , how much of `MgSO_(4)` is present per kg of water ?
Answer» Degree of hardness of `H_(2)O` is 40 ppm, i.e., `10^(6)` g of water contain `CaCO_(3)`=40 g Since 1 mole of `CaCO_(3)-=1 `mole of `MgSO_(4)` `therefore 100 ` g of `CaCO_(3)-=120` g of `MgSO_(4)` `therefore 10^(6)` g of water contain `MgSO_(4)=(40xx120)/(100)=48 g` or `10^(3)` g of water contain `MgSO_(4)=(48xx10^(3))/(10^(6))xx10^(3) ` mg or 1 kg of water will contain `MgSO_(4)=48` mg

Discussion

No Comment Found

Related InterviewSolutions

When temporary hard water containing `Mg(HCO_(3))_(2)` is boiled, the ppt. formed is ofA. `MgCO_(3)`B. `MgO`C. `Mg(OH)_(2)`D. None of these
Water is said to be permanently hard when it contains `:`A. Chloride and sulphates of `Mg` and `Ca`B. Bicarbonates of `Na` and `K`.C. Carbonates of `Na` and `K`D. Phosphate of `Na` and `K.`
Hydrogen gas is not liberated when the following metal is added to dil. `HCl :`A. `Mg`B. `Sn`C. `Ag`D. `Zn`
When zeolite, which is hydrated sodium aluminium silicate, is treated with hard water, the sodium ions are are exchanged withA. `H^(+) ion`B. `Ca^(2+) ion`C. `SO_(4)^(2-) ion`D. `HO^(-) ion`
When zeolite, which is hydrated sodium aluminium silicate is treated with hard water, the sodium ions `(Na^(o+))` are exchanged withA. `OH^(-)` ionsB. `SO_(4)^(2-)`ionsC. `Ca^(2+)` ionsD. `H^(+)` ions
When zeolite, which is hydrated sodium aluminate silicate, is treated with hard water, the sodium ions are exchanged with:A. `Cl^(ɵ)`B. `SO_(4)^(ɵ)`C. `Ca^(2+)`D. `Mg^(2+)`
When zeolite, which is hydrated sodium aluminium silicate is treated with hard water, the sodium ions `(Na^(o+))` are exchanged withA. `H^(o+)` ionsB. `Ca^(2+)` ionsC. `SO_(4)^(2-)` ionsD. `overset(Theta)(O)H` ions
When zeolite, which is hydrated sodium aluminium silicate, is treated with hard water, the sodium ions are exchanged withA. `H^(+)`B. `Ca^(+2)`C. `OH`D. `SO_(4)^(2-)`
One mole of calciium phosphide on reaction with excess water givesA. One mole of phospheneB. Two moles of phospheneC. Two moles of phospheneD. One mole of phosphene pentoxide
When zeolite, which is hydrated sodium aluminate silicate, is treated with hard water, the sodium ions are exchanged with:A. `H^(+)`ionsB. `Ca^(2+)` ionsC. `Mg^(2+)` ionsD. Both `Ca^(2+)` and `Mg^(2+)`

The degree of hardness of a given sample of hard water is 40 ppm. If the entire hardness in due to `MgSO_(4)` , how much of `MgSO_(4)` is present per kg of water ?

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment