MDCAT Chemistry MCQ #43

In a pharmaceutical preparation, 200g of rectified spirit is used as a solvent. According to PTB standards, what is the mass of water present?

MDCAT Chemistry MCQ #43

  1. Question 1

    Q1. In a pharmaceutical preparation, 200g of rectified spirit is used as a solvent. According to PTB standards, what is the mass of water present?

    • A) 9.0 g
    • B) 10.0 g
    • C) 191.0 g
    • D) 4.5 g

    Answer: 9.0 g

    Explanation: Rectified spirit is 95.5% ethanol and 4.5% water. 9g is 4.5% of 200g; 10g would be exactly 5%, which is incorrect.