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Is it practical for a student to measure the mass of liquid reagents for experimentation in kg or pounds?
Wiki User
∙ 11y ago
Neither. Both are dry measures, not liquids so not applicable since different liquids weigh differently by volume. For example, 1 gallon of water weighs 8.34 lbs whereas 1 gallon of gasoline weighs only 6.15 lbs so selecting reagents by any unit of weight is impractical as one would have to know specific weights of the reagents. Reagents are measured by liquid volume, ounces (oz), quarts (qt) and gallons (gal) for standard measure, liters (L) or fractions thereof, i.e. milliliters (ml) for metric measure, which is the world scientific standard.
To convert volume to mass:
a. Look up liquid's density as it is expressed in units of "g/ml" ("d").
b. Next, measure the volume of the liquid in a graduated cylinder ("v").
c. The weight of a liquid in grams is the product of its density and volume:
dv = weight
conversely: v = weight/d
Imagine the nightmare of working any of this out in lbs and oz - metric rules!
Wiki User
∙ 11y ago
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