of a solution is diluted to . What is the new molarity (in M)?
Answer and explanation
Correct answer: C. 3/5
**
- Step 1: In dilution problems, use the relation .
- Step 2: Express : .
- Step 3: Substitute the known values: .
Answer
3/5.
Why not the others: '60' inverts the dilution ratio (), incorrectly predicting a concentrated solution; '3' arbitrarily halves the concentration without using the actual volume ratio; '6' is the initial undiluted molarity before addition of water.
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