1.

How much NaOH is required to prepare 10% w/w 500 gram solution of NaOH ?

Answer»

0.5 GRAM
100 gram
5.0 gram
50 gram

Solution :`%(W)/(w)=(100xx"mass of solute")/("mass of solution")`
`THEREFORE 10=(100xx"mass of solute")/(500)`
`therefore` Mass of solute `= (10xx500)/(100)=50` gram.


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