Where:
Parts of First Source =Required Concentration-Concentration of Second Source
and
Parts of Second Source= Concentration of First Source- Required Concentration
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Question 1 of 3
You need to prepare 750g of an ointment containing 5% (w/w) Calamine. You have ointments containing 10% Calamine, 8% Calamine and 1% Calamine. How many grams of the 8% Calamine do you need? Answer to 1 decimal place.
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Question 2 of 3
How many grams of Benzoic Acid should be added to 325g of an ointment containing 3% Benzoic Acid to prepare an ointment containing 6% Benzoic Acid? Answer to 2 decimal places.
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Question 3 of 3
How many grams of an ointment containing 25% Benzocaine do you need to mix with 550g of ointment base to produce an ointment containing 15% Benzocaine?
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