of a solution is diluted to . What is the new molarity (in M)?
Answer and explanation
Correct answer: A. 6/25
- Step 1: For a solution dilution, the total amount of solute remains constant: , where is molarity and is volume.
- Step 2: Solve for the final molar concentration: .
- Step 3: Substitute the given values , , and : .
Answer
6/25.
Why not the others: 6 assumes no dilution occurred; 3 assumes a twofold dilution factor; 150 multiplies volume by 15.
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