Question

How many grams of drug substance are required to make 120mL of a 20% (w/w) solution having a sp. gr. of 1.15? A. 69 g C. 27.6 g B. 0.69 g D. 0.27 g

Answer 1

To make a 120mL solution with 20% concentration and a specific gravity of 1.15, 27.6 grams of drug substance are required.

Step-by-step explanation:

To determine the number of grams of drug substance required, we need to first calculate the mass of the drug substance using the given volume, percent concentration, and specific gravity. We can use the formula:

Mass = Volume x Percent Concentration x Specific Gravity

Plugging in the values, we have:

Mass = 120 mL x 20% x 1.15 = 27.6 g

Therefore, 27.6 g of drug substance are required to make 120mL of a 20% (w/w) solution with a specific gravity of 1.15.