A solution contains 40ml of ethanol in 420 ml of water. Calculate the concentration (in terms of volume by voulme percentage ) of the soultion .
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Answer:
Given,
Mass of ethanol = 40ml
Mass of water = 420 ml
Mass of solution = 420 + 40 = 460ml
Concentration of solution = volume of solute / volume of solution * 100
= 40 / 420 * 100
= 200/21 = 9. 52%
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