Type 4 - Find the quantity of base or vehicle

9. Altering Product Strength 9.2) Alligation 9.2.1) Alligation Alligation Normal 1

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You want to prepare 43% of an ointment. You have some ointment base or vehicle and 1100 g of 50% ointment. Calculate how many grams of base you need to mix with the 50% ointment in order to compound the product.

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lb equals 179.07 g kg

    Tic-tac-toe, Short form:

    `[[50 % (1100 \quad g),\quad\quad\quad\quad, 43 pt],[\quad\quad\quad\quad,43 % , \quad\quad\quad\quad],[0 % (? g),\quad\quad\quad\quad,7 pt]]`

    Therefore, 7 parts of the ointment base should be mixed with 43 parts of the ointment having a concentration of 50 % and the weight of 1100 grams.
    `(1100 \quad g)/(43 \quad parts)=x/(7 \quad parts) \quad therefore x = 179.07 \quad g`. Ans.