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Q.

Calculate the grams of NaOH (6.15% by mass) in 285 g of water solution.

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a

10.25 g

b

17.52 g

c

18.26 g

d

1.752 g

answer is D.

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Detailed Solution

The mass of element present in the grams for every 100 g of the total mass of the mixture is called as mass percentage. 

Question Image

Mass percentage of NaOH is 6.15% by mass

Mass of solution is 285 g

Let the mass of NaOH be x.

Question Image

Substituting given values,

Question Image

Thus, the amount of NaOH needed is 17.52 G

Hence, the correct option is D.


 

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