Answer:
When a pharmacy technician is preparing an order for 40 g of hydrocortisone ointment containing 2% hydrocortisone and 3% calamine, the amount of ointment that corresponds to the inactive solvent is 38 g.
Step-by-step explanation:
If a pharmaceutical preparation of hydrocortisone ointment contains 2% hydrocortisone and 3% calamine, it will contain only 2 g of these active compounds in 40 g of preparation. This means that the amount of inert or inactive solvent is 38 g.
1. Hydrocortisone 2% + calamine 3% = 5%.
40 g ------------------ 100%
X ------------------ 5%
Active components = (40 X 5) / 100 = 2g
2. Inactive solvent = Total amount - active components
Inactive solvent = 40 g - 2 g = 38 g
2% hydrocortisone ointment composition
Hydrocortisone ........ 0,8 g
Calamine ................. 1,2 g
Inert excipient ..... 38 g
Total ......................... 40 g