Type 3 - Find the quantity of pure drug
9. Altering Product Strength 9.2) Alligation 9.2.1) Alligation
9.2.1.1) Alligation Normal 1
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How many grams of a pure drug powder should you add to 1160 g of 35 % of an ointment of the same drug so that the blended strength becomes 70%?
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lb equals 1353.33 g kg
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Tic-tac-toe, Short form:
`[[100 % (? \quad g),\quad\quad\quad\quad, 35 pt],[\quad\quad\quad\quad,70 % , \quad\quad\quad\quad],[35 % (1160 \quad g),\quad\quad\quad\quad,30 pt]]`
Therefore, 35 parts of pure drug should be mixed with 30 parts of the mixture which has a concentration of 35 % and the weight of 1160 grams.
`(1160 \quad g)/(30 \quad parts)=x/(35 \quad parts) \quad therefore x = 1353.33 \quad g`. Ans.