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A sample of hard water is allowed to pas...

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

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No, water will not produce lathe with soap easily, as `Ca^(2+)` and `Mg^(2+)` ions are still present which react with soap to form curdy white precipitate.
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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?

Why do soaps produce lather with soft water ?gt

Which will produce hard water ?

Why does hard water not from lather with soap ?

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

CENGAGE CHEMISTRY-APPENDIX - INORGANIC VOLUME 1-Exercise Short
  1. What is the name given to hydrogen if nuclei of both the atoms have sa...

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  2. what happens if conc H(2)SO(4) is used in preparing hydrogen by its re...

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  3. A sample of hard water is allowed to pass through anion exchange resin...

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  4. What is the mass of one of deuterium oxide?

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  5. What is deionised water?

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  6. Which gas will be produced when heavy water is treated with a mixture ...

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  7. What type of substances can easily dissolve in water?

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  8. Give a reaction in which H(2)O acts as an oxidising agent.

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  9. What requirement should be fulfilled by potable water (water for drink...

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  10. Which is heavier: water or ice?

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  11. What type of bonds are broken when water evaporates?

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  12. The degree of hardness of a given sample of hard water is 40 p p m. If...

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  13. Why cannot the dilute solution of hydrogen peroxide be concentrated by...

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  14. Which organic reagent can be used for the manufacture of hydrogen pero...

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  15. H(2)O(2)+Cl(2)to 2HCl+O(2) In the above reaction, H(2)O(2) act as .

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  16. Old lead paintings are generally washed with dilute solution of H(2)O(...

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  17. What is the dihedral angle between two H atoms of H(2)O(2)?

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  18. What is the product of the reaction between benzene and H(2)O(2)?

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  19. Which isotope of hydrogen (a) does not contain neutron, (b) contains e...

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  20. Why is dihydrogen not preferred in weather balloons these days?

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