What volume of 2.5% (m/v)KOH can be prepared from 125 mL of a 5.0% KOH solution?
A)0.0040 mL
B)125 mL
C)0.10 mL
D)63 mL
E)250 mL

Question

Quizplus · Accepted Answer

To prepare a 2.5% solution from a 5.0% solution, the volume of the 5.0% solution must be diluted with an equal volume of solvent, effectively halving the concentration. Therefore, to use 125 mL of a 5.0% solution, an additional 125 mL of solvent would be added, resulting in a total volume of 250 mL of a 2.5% solution.

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