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max2010maxim [7]
4 years ago
13

If you have 100.0ml of a 30.0% aqueous solution of ethanol, what volume of ethanol is in the solution?

Chemistry
2 answers:
musickatia [10]4 years ago
7 0

Answer:

30 ml

Explanation:

  • Assuming that solution is only composed of water and ethanol, we must know that solution is (100% - 30% = 70%) water by volume. To determine the volume of water multiply volume of solution by volume of the percentage of water.
  • V(water) = 70% x 100ml = 70 ml
  • V(ethanol)  = V(solution) - V(water) = 100ml - 70ml = 30ml
Verdich [7]4 years ago
4 0
Percent by volume is equal to the volume of the solute over the total volume of the solution times 100%. Therefore,

30 = volume of ethanol / 100 mL x 100
volume of ethanol = 30 mL

Hope this answers the question. Have a nice day.

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