conversion factor to convert the volume of the liquid to weight. The formula for a
weight/volume calculation is:
AXSXD
Q = --------------, where D = Density of the diluent .
C
If the dilutent is water, the density is 8.34 pounds per gallon. If a diluent
other than water is used, the density of that particular diluent should be
determined for most accurate results. A few common diluents and their
densities are the following:
(1) Acetone (6.5 lb/gal).
(2) Fuel oil No. 2 (7 lb/gal).
(3) Kerosene (6.4 to 6.6 lb/gal).
b. Calculation. The following sample problem will illustrate the use of the
formula for mixing solid (powder) concentrates with liquid diluents.
(1) Problem. 5 gallons of 2% carbaryl suspension are to be prepared
using carbaryl 80% wettable powder and water. How many pounds of concentrate are
required?
(2) Figure 2-4 illustrates the problem graphically.
(3) Computation.
AXSXD
5 gal X .02 X 8.34 lb/gal
Q = ------------ = -------------------------- = 1.04 pounds
C
0.80
concentrate
This amount (1 pound) of concentrate is placed in a 5-gallon container and
enough water is added to fill the container (total mixture = 5 gallons).
MD0173
2-10