Saloni prepared a solution by mixing 35 mL of ethanol in 200 mL of water. She divided the solution in two equal parts. To one part, she added some more ethanol so that the concentration of this new solution becomes 20% (v/v). The extra volume of ethanol added by Saloni is (approximately)
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How do you calculate concentration when mixing solutions?
Use the formula x = (c ÷ V) × 100 to convert the concentration (c) and volume (V) of the final solution to a percentage. In the example, c = 60 ml and V = 350 ml. Solve the above formula for x, which is the percentage concentration of the final solution.
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