The solvent diethyl ether can be mixed with water but only by shaking the two liquids together. After the shaking is stopped, the liquids separate into two layers, much like oil and vinegar. The free-base form of the alkaloid caffeine is readily soluble in diethyl ether but not in water. Suggest what might happen to the caffeine of a caffeinated beverage if the beverage was first made alkaline with sodium hydroxide and then shaken with some diethyl ether.
The solvent diethyl ether can be mixed with water but only by shaking the two liquids together. After the shaking is stopped, the liquids separate into two layers, much like oil and vinegar. The free-base form of the alkaloid caffeine is readily soluble in diethyl ether but not in water. Suggest what might happen to the caffeine of a caffeinated beverage if the beverage was first made alkaline with sodium hydroxide and then shaken with some diethyl ether.
The solvent diethyl ether can be mixed with water but only by shaking the two liquids together. After the shaking is stopped, the liquids separate into two layers, much like oil and vinegar. The free-base form of the alkaloid caffeine is readily soluble in diethyl ether but not in water. Suggest what might happen to the caffeine of a caffeinated beverage if the beverage was first made alkaline with sodium hydroxide and then shaken with some diethyl ether.
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P
Note: You may assume you have an excess of either reactant if the reaction requires more than one of those molecules to form the products.
In the drawing area below, draw the skeletal ("line") structures of the missing organic products X and Y. You may draw the structures in any arrangement that
you like, so long as they aren't touching.
H+
H+
+ -OH
☑
Y
Predict the organic products that form in the reaction below:
Click and drag to start drawing a
structure.
Justify the statement: Polymer molecular weight is
expressed in terms of an average. Calculatethe number
average and weight average molecular weights of polymer
molecules with different degrees of polymerization such as
300, 550, 750 and 900 that are mixed in a molecular ratio
1: 2: 3: 4 in a sample of high polymer of styrene(C6H5
CH= CH2).
The aquation of tris(1,10-phenanthroline)iron(II) in acid solution takes place according to the
following chemical equation:
Fe(phen)32++ 3 H3O++ 3 H20 → Fe(H2O)62+ + 3 phenH+
If the activation energy, Ea, is 126 kJ/mol and the rate constant at 30°C is 9.8 x 10-3 min-1,
what is the rate constant at 45°C?
O 1.1 x 103 min-1
O 1.1 x 10-1 min-1
9.3 x 10-4 min-1
9.6 x 100 min-1
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