1.

What volume of water must be added to 500 ml NaOH to make 2% (w/v) NaOH

Answer»

`5000 mL`
`6000 mL`
`5500 mL`
`6500 mL`

Solution :MOLES of `NaOH = 0.5 xx 6 = 3` mole
`= 3 xx 40`
`= 120 gm`
`2% ((W)/(v)) NaOH`
`(120)/(V) xx 100 = 2`
`V = 6000 mL`
Volume added `= (6000 - 500) mL`
`= 5500 mL`


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