Type 4 - Find the quantity of base or vehicle
9. Altering Product Strength 9.2) Alligation 9.2.1) Alligation
9.2.1.1) Alligation Normal 1
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You want to prepare 14% of an ointment. You have some ointment base or vehicle and 420 g of 60% ointment. Calculate how many grams of base you need to mix with the 60% ointment in order to compound the product.
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lb equals 1380 g kg
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Tic-tac-toe, Short form:
`[[60 % (420 \quad g),\quad\quad\quad\quad, 14 pt],[\quad\quad\quad\quad,14 % , \quad\quad\quad\quad],[0 % (? g),\quad\quad\quad\quad,46 pt]]`
Therefore, 46 parts of the ointment base should be mixed with 14 parts of the ointment having a concentration of 60 % and the weight of 420 grams.
`(420 \quad g)/(14 \quad parts)=x/(46 \quad parts) \quad therefore x = 1380 \quad g`. Ans.