Dilution Practice Problems (C₁V₁ = C₂V₂)

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When you dilute a concentrated stock solution, the amount of drug stays constant while the volume increases, so the concentration falls proportionally. The dilution equation lets you solve for whichever variable is unknown, most often the volume of stock solution needed to hit a target concentration.

💡 The drug amount is unchanged by dilution; only concentration and volume change. Remember to QS to the final volume when the question asks for it.