The percentage or ratio strength (concentration) of a component in a pharmaceutical preparation is based on its quantity relative to the total quantity of the preparation. If the quantity of the component remains constant, any change in the total quantity of the preparation, through dilution or concentration, changes the concentration of the component in the preparation inversely. An equation useful in these calculations is: (1st quantity) ?x (1st concentration) ?= (2nd quantity) x? (2nd concentration) Show your complete solution.
The percentage or ratio strength (concentration) of a component in a pharmaceutical preparation is based on its quantity relative to the total quantity of the preparation. If the quantity of the component remains constant, any change in the total quantity of the preparation, through dilution or concentration, changes the concentration of the component in the preparation inversely.
An equation useful in these calculations is:
(1st quantity) ?x (1st concentration) ?= (2nd quantity) x? (2nd concentration)
Show your complete solution.
1.
If a pharmacist will make a 10-gram Lassar’s Paste, containing 30% of Zinc oxide, using a prepared product with a concentration of 48%.
Compute for the amount of white petrolatum (base) and amount of 48% Lassar’s paste needed for the dilution.
Amount of white petrolatum (base) needed =
Amount of 48% Lassar's paste needed =
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