Question

The density of 20% w/v of solution NaOH is 1.5g/mole calculatr % by weight of NaOH in solution

Answer 1

Given ;- 20 % w/v
density = 1.5 g /ml

1st of all 20% w/v means 100 ml solution has 20g NaOH

we know that mass = volume × density

hence,

wt of 100 ml solution = 100ml × 1.5g/ml

=> 150g

wt of fraction of NaOH = 20 / 150

% by weight = 20 / 150 × 100

= 40 / 3

$\bf{13.33\% \: answer}$

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$\bf{hope \: it \: helps \: you}$

`#`Rajukumar111