Question

3. A prescription for an ointment has 3.5 mL of liquid menthol in a total of 220 mL. Calculate the percentage (v/v) of liquid menthol in the ointment.

Answer 1

The percentage (V/V) of liquid menthol in the ointment is 1.59%.

Explanation:

Given : A prescription for an ointment has 3.5 mL of liquid menthol in a total of 220 mL.

To find : Calculate the percentage (V/V) of liquid menthol in the ointment ?

Solution :

Volume of liquid menthol is
`V_m= 3.5\ mL`

Total volume of ointment is
`V_t= 220\ mL`

The V/V percentage is given by,

`(V)/(V)\%=(V_m)/(V_t)* 100`

`(V)/(V)\%=(3.5)/(220)* 100`

`(V)/(V)\%=0.0159* 100`

`(V)/(V)\%=1.59\%`

Therefore, the percentage (V/V) of liquid menthol in the ointment is 1.59%.