If the concentration of a solution is 15% (m/v) and density of solution is 1.2 g/ml then find the concentration of the same solution in (m/m) ?
Options:
(1) 10% (2) 12.5% (3) 15% (4) 17.5%
Answers
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Answer: option (2): 12.5%
Explanation:
The [mass/volume] concentration of a solution = 15%
We know that, [mass/volume]% is given as,
[{Mass of solute in grams} / {Volume of solution in ml} * 100]
So, we can conclude that,
Mass of solute = 15 g
Volume of solution = 100 ml
The density of the solution is given as = 1.2 g/ml
∴ Mass of the solution = density * volume = 1.2 * 100 = 120 g
Thus,
The [m/m] concentration of the same solution is given as,
= [{mass of solute} / {mass of solution} * 100]
= [15/120] * 100
= 12.5%
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