(1)

Solve first for the amount of peppermint oil needed:

IF

THEN

100 ml Peppermint oil =

X ml peppermint oil

1000 ml spirit

240 ml spirit

(2)

Cross multiply: (1000) X = 100 (240)

1000 X = 24000

X = 24 ml of peppermint oil

(3)

To solve for the amount of peppermint powder needed:

IF

THEN

10 g peppermint powder

= _X g peppermint powder

1000 ml of spirit

240 ml of spirit

(4)

Cross multiply: (1000)X

= 10 (240)

1000 X

= 2400

X

= 2.4 g of Peppermint powder

c. Knowing that qsad means to "add a sufficient quantity up to," take 2.4 g of

peppermint powder, add 24 ml of peppermint oil, and add as much alcohol as is

necessary to make 240 milliliters. The final product will be Peppermint Spirit.

The conversion factor method is the easiest and therefore the most widely used

method for reducing or enlarging formulas.

a.

Find the conversion factor:

Total quantity desired_

= Conversion Factor

Total quantity of official formula

have the same units so the units will cancel and yield a conversion factor without units.

MD0802

1-67

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