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 580 g of 90% ointment. Calculate how many grams of base you need to mix with the 90% ointment in order to compound the product.


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lb equals 3148.57 g kg

    Tic-tac-toe, Short form:

    `[[90 % (580 \quad g),\quad\quad\quad\quad, 14 pt],[\quad\quad\quad\quad,14 % , \quad\quad\quad\quad],[0 % (? g),\quad\quad\quad\quad,76 pt]]`

    Therefore, 76 parts of the ointment base should be mixed with 14 parts of the ointment having a concentration of 90 % and the weight of 580 grams.
    `(580 \quad g)/(14 \quad parts)=x/(76 \quad parts) \quad therefore x = 3148.57 \quad g`. Ans.


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