Chapter 97 Dilutions and Concentration Q&A (1 of 40) Sample Questions

1. A prescription calls for Hydrocortisone cream 0.1%. Pharmacy has 0.25% available in 30 g tube. How many grams of diluents base (vanishing cream) should be added?
  1. A. 30 g
  2. B. 45 g
  3. C. 50 g
  4. D. 75 g
Answer
Ans: B
Tips: Solution/Answer:
V2 = (C1 x V1)/C2
V2 = (0.25% x 30 g)/0.1%
V2 = 75 g
But the added tube contains 30 g
So, the used base = 75 g - 30 g = 45 g