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PTECH Pharmaceutics II (Industrial & Quality Control) QUESTION #5696
Question 1
In the formula $V_{1}C_{1} = V_{2}C_{2}$, if we dilute $50 \text{ mL}$ of $95\% \text{ v/v}$ Alcohol to $70\% \text{ v/v}$, what is the final volume $V_{2}$?
  • $36.8 \text{ mL}$
  • $135.7 \text{ mL}$
  • $67.8 \text{ mL}$✔️
  • $50.0 \text{ mL}$
Correct Answer Explanation
Calculation: $50 \times 95 = V_{2} \times 70 \Rightarrow V_{2} = 4750/70 \approx 67.8 \text{ mL}$.