Chemistry, 11.09.2019 02:30, landanwithers
In this experiment, 0.070 g of caffeine is dissolved in 4.0ml of water. the caffeine is extracted from the aqueous solution three times with 2.0-ml portions of methylene chloride. calculate the total amount of caffeine that can be extracted into the three portions of methylene chloride (see technique12, section12.2). caffeine has a distribution coefcient of 4.6, between methylene chloride and water.
Answers: 3
Chemistry, 21.06.2019 16:30, KieraKimball
10-14. (a) when 100.0 ml of weak acid ha were titrated with 0.093 81 m naoh, 27.63 ml were required to reach the equivalence point. find the molarity of ha. (b) what is the formal concentration of a- at the equivalence point? (c) the ph at the equivalence point was 10.99. find pk. for ha. (d) what was the ph when only 19.47 ml of naoh had been added?
Answers: 1
Chemistry, 21.06.2019 21:30, KnMcdonaldk93906
Which substances have the lowest melting points: ionic covalent, or metallic
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At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure
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In this experiment, 0.070 g of caffeine is dissolved in 4.0ml of water. the caffeine is extracted fr...
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