The base stock solution was titrated to neutralize an equal quantity of the acid, so without the presence of vegetable oil it would require 40 milliliters of acid to cause a color change, but in the pure oils tested ( almond, benne, cottonseed, cod liver oil, linseed oil, and olive oil, only 6 milliliters were required.
22.
As a geneticist working for the Royal Horticultural Society's Garden Wisley in the early 1950s, Dr . Janaki was investigating the effects of colchicine on a number of woody plants, including Magnolia, where a stock solution in water is made up and applied to the growing tip of young seedlings once the cotyledons ( seed leaves ) have fully expanded.
23.
:Sulfuric acid is usually provided as a concentrated solution in water . ( Usually 18 M, although your stock solution may be different-examine the container to be certain . ) After determining the volume of dilute solution you need, calculate the number of moles of sulfuric acid you need for that volume ( for 1 L, it's 0.13 mol; for 100 mL, 0.013 mol ).
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