Question

5g NAOH was add to 1000 ml of water find the % NAOH by wt.

Answer 1

vol of water = 1000 ml ⇒ mass of water is also 1000g (as density of water is 1g /ml)

given mass of NaOH = 5g

hence % of NaOH = (given mass of NaOH / mass of water) x 100
     = (5/1000)x 100 = 5/10 = 0.5 %
so, your answer is 0.5% 

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