Problem: Which is more concentrated, a solution (1) prepared by dissolving 21.0 g of NaF (0.500 mol) in enough water to make 500 mL of solution or a solution (2) prepared by dissolving 10.5 g (0.250 mol) of NaF in enough water to make 100 mL of solution?

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molarity (M)=molL


(1) prepared by dissolving 21.0 g of NaF (0.500 mol) in enough water to make 500 mL

molarity=0.500 mol NaF500 mL×10-3 L1 mLmolarity=0.500 mol NaF0.500 Lmolarity=1.00moL NaFL

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Problem Details

Which is more concentrated, a solution (1) prepared by dissolving 21.0 g of NaF (0.500 mol) in enough water to make 500 mL of solution or a solution (2) prepared by dissolving 10.5 g (0.250 mol) of NaF in enough water to make 100 mL of solution?

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