Question

1. A pill weighing 325mg contains Captopril, a medication for high blood pressure. What is the concentration of Captopril in ppm?
2. A patient is given 1000mL of 5 percent glucose C6H12O6 solution intravenously in a 12 hour period. How many grams of glucose did the patient receive per hour?

Answer 1

1. The concentration of Captopril in ppm depends on its total content in the pill.
2. % = (100 x m_solute) / (m_solvent + m_solute)

5% = (100 x m_solute) / 1000

1000 ml = 1000 g

m_solute (C₆H₁₂O₆) = (5 x 1000) / 100 = 50 g

m_solute (C₆H₁₂O₆) per 1 hour = 50 / 12 = 4.2 g