A 50 % solution (20 ml) is diluted to a 5 % solution. What is the final volume?
Answer and explanation
Correct answer: D. 200 ml
- Step 1: C1 x V1 = C2 x V2. Step 2. V2 = 50 x 20 / 5 = 200 ml. Answer: 200 ml. Why not the others: 2 ml: the ratio of the concentrations was inverted. 65 ml: the quantities were added and subtracted. 180 ml: this is the volume of water added, not the final volume.
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