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Why does hard water not from lather wit...

Why does hard water not from lather with soap ?

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Soft and hard water

ICSE-HYDROGEN-SHORT ANSWER TYPE QUESTIONS
  1. Give one reaction each to show that water can act as a ligand.

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  2. How do water molecules get linked in different types of hydrates ?

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  3. Why does hard water not from lather with soap ?

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  4. Describe the auto-oxidation process for the manufacture of H(2)O(2).

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  5. How is an aqueous solution of hydrogen peroxide concehtrated to get 10...

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  6. What happens when hard water containing CaSO(4) is treated with calg...

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  7. What happens when ozone is passed in an aqueous solution of kl.

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  8. What happens when acidified ferrous sulphate solution is treated wit...

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  9. What happens when H(2)O(2) reacts with chlorine.

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  10. What happens when H(2)O(2) is treated with acidified potassium perm...

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  11. Distinguish clearly between hard and soft water

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  12. Distinguish clearly between temporary and permanent hardness.

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  13. Describe the structure of hydrogen peroxide.

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  14. How is hydrogen peroxide manufactured from H(2)SO(4) ? Describe the pr...

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  15. What precautions should be observed for the safe storage of hydrogen p...

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  16. Describe some important oxidising properties of hydrogen peroxide

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  17. Describe some important reducing properties of hydrogen peroxide

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  18. Why does H(2)O(2) act both as an oxidising and a reducing agent?

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  19. What do you understand by the volume strength of H(2)O(2) ? Illustrate...

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  20. Mention some important uses of hydrogen peroxide

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