What is the concentration of an aqueous solution that contains 1.5 moles of NaCl in 500. milliliters
- Mayya Alocci
- Jul 25, 2023
- 1 min read
June 2018 NY Regents Chemistry Exam
42 What is the concentration of an aqueous solution that contains 1.5 moles of NaCl in 500. milliliters of this solution? (1) 0.30 M
(2) 0.75 M (3) 3.0 M
(4) 7.5 M
Solution: Table T on the Reference Table provides the formula for molarity
molarity = moles of solute/liters of solution
Notice, that we are given milliliters and not liters. We need to first convert milliliters into liters.
500ml/1000 = 0.500 L
M = 1.5 moles/0.500 L
M=3.0 M
Answer: 3
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