A solution contains 40 ml of acid in 120 ml of water. Calculate the concentration in terms of volume by volume percentage of the solution.
25%
The correct answer is option 4 i.e. 25%.
To calculate the volume by volume percentage, use the formula:
(Volume of solute / Total volume of solution) × 100. Here, the volume of acid (solute) is 40 ml and the volume of water is 120 ml, making the total volume 160 ml.
Applying the formula:
(40 / 160) × 100 = 25%.
Thus, the concentration of acid in the solution is 25% v/v. This means 25 ml of acid is present in 100 ml of solution. This type of calculation is important in chemistry to express solute proportion clearly in a mixture.
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