Home
Class 11
CHEMISTRY
100 mL sample of hard water is passed th...

`100 mL` sample of hard water is passed through a column of the ion exchange resin `RH_(2)`. The water coming off the column requires `15.17 mL` of `0.0265 M NaOH` for its titration. What is the hardness of water as `"ppm"` of `Ca^(2+)`?

Text Solution

Verified by Experts

The correct Answer is:
`80.40`;
Promotional Banner

Topper's Solved these Questions

  • MOLE AND EQUIVALENT CONCEPT

    P BAHADUR|Exercise Exercise 8 Statements: Explanation type problems|11 Videos

  • IONIC EQUILIBRIUM

    P BAHADUR|Exercise Exercise|85 Videos

  • RADIO ACTIVITY

    P BAHADUR|Exercise Exercies 9|99 Videos

Similar Questions

Explore conceptually related problems

A water is said to be soft water if it produces sufficient foam with the soap and waterthat does not produce foam with soap is known as hard water. Hardness has been classified into two types (i)Temporary hardness (ii) Permanent hardness. Temporary hardness is due to presence of calcium and magnesium bicarbonate. It is simply removed by boiling as Ca(HCO_(3))_(2)overset(Delta)rarr CaCO_(3)darr+CO_(2)uarr+H_(2)O Mg(HCO_(3))_(2)overset(Delta)rarr MgCO_(3)darr+CO_(2)uarr+H_(2)O temporary hardness can also be removed by addition of slaked lime, Ca(OH)_(2) Ca(HCO_(3))_(2)+Ca(OH)_(2)to2CaCO_(3)darr+2H_(2)O permanent hardsness is due to presencce of sulphates and chlorides of Ca,Mg,etc. It is removed by washing soda as CaCl_(2)+Na_(2)CO_(3)toCaCO_(3)darr+2NaCl CaSO(4)+Na_(2)CO_(3)to CaCO_(3)darr+Na_(2)SO_(4) Permanent hardness also removed by ion exchange resin process as 2RH+Ca^(2+)toR_(2)Ca+2H^(+) 2ROH+SO_(4)^(2-)toR_(2)SO_(4)+2OH^(-) The degree of hardness of water is measured in terms of PPm of CaCO_(3) 100 PPm means 100 g of CaCO_(3) is present in 10^(6) g of H_(2)O . If any other water sample which contain 120 PPm of MgSO_(4) , hardness in terms of CaCO_(3) is equal to =100 PPm. A 200 g sample of hard water is passed through the column of cation exchange resin, in which H^(+) is exchanged by Ca^(2+) .The outlet water of column required 50mL of 0.1 M NaOH for complete neutralization.What is the hardness of Ca^(2+) ion in PPm?

A sample of hard water is allowed to pass through anion exchange resin. Will it produce lather with soap easily?

When hard water is passed through ion exchange resin with formula RNH_(3)^(+)OH^(-) it becomes free from

100 mL of a sample of hard water requires 25.1 mL of 0.02 N H_(2)SO_(4) for complete reaction, The hardness of water ( density 1g//mL) is:

P BAHADUR-MOLE AND EQUIVALENT CONCEPT-Exercise 9 Advanced numerical problems
  1. 20 "litre" of air containing CO(2) at STP passed through 100 mL of 0.1...

    Text Solution

    |

  2. 1.0 gallon pure octane ( "density" 2.65 kg//"gallon") on combustion pr...

    Text Solution

    |

  3. 11.2 g of carbon reacts with 21.1 litres of oxygen at 18^(@)C and 750 ...

    Text Solution

    |

  4. 5 mL of a gaseous hydrocarbon was exposed to 30 mL measure 25 mL of wh...

    Text Solution

    |

  5. The gases produced when 18 g carbon reacts with 5 "litre" of oxygen at...

    Text Solution

    |

  6. The molecular mass of an organic acid was determined by the study of i...

    Text Solution

    |

  7. 1 g of a mixture containing equal no.of moles of carbonates of two alk...

    Text Solution

    |

  8. What would be the molality of a solution obtained by mixing equal volu...

    Text Solution

    |

  9. A sample of fuming sulphuric acid containing H(2)SO(4), SO(3) and SO(2...

    Text Solution

    |

  10. Calculate the ionic strength of a solution containing 0.2M NaCL and 0....

    Text Solution

    |

  11. 200 mL of a solution of mixture of NaOH and Na(2)CO(3) was first titra...

    Text Solution

    |

  12. Two drops of phenolphthalein was added to 40 " mL of " HCl solution. W...

    Text Solution

    |

  13. A sample supposed to be pure CaCO(3) is used to standardise a solution...

    Text Solution

    |

  14. 100 mL sample of hard water is passed through a column of the ion exch...

    Text Solution

    |

  15. A sea water sample has density of 1.03g//cm^(3) and 2.8% NaCl by mass....

    Text Solution

    |

  16. One litre of a mixture containing BaF(2) and H(2)SO(4) was taken for a...

    Text Solution

    |

  17. 5 g of CuSO(4). 5H(2)O is intended to be prepared by using CuO and fo...

    Text Solution

    |

  18. A mixture contains 20 g of caustic soda, 20 g of sodium carbonate an...

    Text Solution

    |

  19. The reaction, Zn+CuSO(4)rarrCu+ZnSO(4) goes to completion. In one expe...

    Text Solution

    |

  20. A sample of green crystals of nickel (II) sulphate heptahydrate was he...

    Text Solution

    |