How many ml of a 0.2w/w% NaOH solution (d=1.2 g/ml) contains 1.32g solute ?

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I dont what should I do

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Answer 1 · 2018-07-18T09:05:32

550 ml

In a 0.2% w/w solution, 0.2 g of solute is found in 100 g of solution. Therefore, 1.32 g of solvent is found in:

#(1.32/0.2) times 100 = 660# g

To get the volume in ml, rearrange the relationship between density D, mass M and volume V, #D = M/V # to give #V = M/D#

And plug in the numbers: Volume = (660 / 1.2) = 550 ml.