1.

How much water should be added to 2% W/V, 5 liter NaOH solution so as to make its concentration to 0.5 N ?

Answer»

5 lit
2.5 lit
1 lit
No need to add water

SOLUTION :2% W/W
i.e., 100 mL `to` 2 gram NaOH
1000 mL `to` 20 gram NaOH
To GET 0.5 N solution,
W = NORMALITY `xx` eq. weight `xx` volume
`= 0.5xx40xx1=20` gram
`therefore` There is no need to add water.


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