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Worksheet 3

 Acid-Base and Salt 

1. How is concentration of hydronium ions (H3O+) affected when a solution of acid isdiluted?

Ans. The concentration of hydronium ions decreased when the solution of an acid is diluted.

2.  What effect does the concentration of H+ ions have on the nature of the solution?

Ans. Higher the concentration of H+ ions, greater is the acidic nature of the solution.

3.   Name the substance which on treatment with chlorine yields bleaching powder.

Ans. Slaked lime or calcium hydroxide.


4. What is the common name of the compound CaOCl2?

Ans. Bleaching powder.

5.   Name the sodium compound which is used for softening hard water 

Ans. Sodium carbonate is used for softening hard water.


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