Question

How much local anesthesia is there in a dental cartridge of 2% concentration (1.8 ml)

a. 9 mg
b. 18 mg
c. 36 mg
d. 54 mg

Answer 1

To find the amount of local anesthesia in a dental cartridge with a 2% solution and 1.8 ml volume, convert the percentage to mg/ml and multiply by the volume, resulting in 36 mg of local anesthesia.

Step-by-step explanation:

The student has posed a question within the realm of pharmacy calculations, which is tied to mathematics. The specific question seeks to determine the amount of local anesthesia in a dental cartridge with a 2% concentration and a volume of 1.8 ml.

To calculate the quantity of anesthesia, we utilize the following method:

1. Understand that a 2% concentration means there are 2 grams of anesthesia per 100 ml of solution.
2. Convert grams to milligrams since 1 gram is equivalent to 1000 milligrams.
3. Multiply the volume of the cartridge (1.8 ml) by the concentration in mg/ml.

Step-by-step calculation:

• (2 grams/100 ml) x 1000 mg/gram = 20 mg/ml concentration
• 20 mg/ml x 1.8 ml = 36 mg

Therefore, the correct answer is c. 36 mg of local anesthesia in the dental cartridge.