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5) When a small amount of CH3(CH2)4CO2H (pKa --4.8) is added to a separatory funnel that...
When a small amount of CH3(CH2)4CO2H, (pKa ~4.8) is added to a separatory funnel that contains ether and water with a pH = 2.0, it is found mainly in the ________ layer as ________. A) ether; CH3(CH2)4CO2- B) water; CH3(CH2)4CO2- C) ether; CH3(CH2)4CO2H D) water; CH3(CH2)4CO2H E) none of the above
5. Suppose you dissolve 0.1 moles of 1-aminobutane (NH2-CH2-CH2-CH2-CH3) in 1.0 liter of water. a. What are all of the molecules and ions you would expect to find in the solution? b. Which two of the above will be found in the greatest total amount? Hint: what is the approximate pKa of an amino group?) c. Which one of the above will be found in the least total amount?
2. When using the separatory funnel you may have observed a oily emulsion between the aqueous and DCM layers. What components of tea are responsible for this emulsion? How can one minimize the size of the emulsion layer? 3. How does adding the anhydrous sodium sulfate to the dichloromethane solution remove water? 4. If the above step was omitted in the isolation procedure, how would this be reflected in the yield of caffeine? 5. A student used 8.23 g of...
Would the methylene chloride layer be above or below the experiment? Justify your answer. 1. aqueous layer in today's ium carbonate used in the isolation of caffeine? Be specific as to the 2. Why is potass chemical species the carbonate may act on. Why was sodium sulfate used? 3. 4. After introducing 1.0 g of potassium carbonate into the centri hot water extract, it was capped, shaken, and then cooled to room temperature. Following this, roug minute. Why wasn't the...
6) When 0.0100 moles of dimethyl amine ((CH3)2NH) is added to 1.000 liters of water, the pH of the water increases above the value pH = 7.0 found for neutral solutions. Based on this, we may conclude that a) dimethyl amide is a Lewis base b) dimethyl amide is a Bronsted base c) dimethyl amide is an Arrhenius base d) both b and c e) Both a and b and
6) When 0.0100 moles of dimethyl amine ((CH3)2NH) is added to 1.000 liters of water, the pH of the water increases above the value pH = 7.0 found for neutral solutions. Based on this, we may conclude that a) dimethyl amide is an Arrhenius base b) dimethyl amide is a Bronsted base c) dimethyl amide is a Lewis base d) both a and b e) Both a and b and c
6) When 0.0100 moles of dimethyl amine ((CH3)2NH) is added to 1.000 liters of water, the pH of the water increases above the value pH = 7.0 found for neutral solutions. Based on this, we may conclude that a) dimethyl amide is an Arrhenius base b) dimethyl amide is a Bronsted base c) dimethyl amide is a Lewis base d) both a and b e) Both a and b and c 3
urgent
6) When 0.0100 moles of dimethyl amine (CH3)2NH) is added to 1.000 liters of water, the pH of the water increases above the value pH = 7.0 found for neutral solutions. Based on this, we may conclude that a) dimethyl amide is an Arrhenius base b) dimethyl amide is a Bronsted base c) dimethyl amide is a Lewis base d) both a and b e) Both a and band c
6) When 0.0100 moles of dimethyl amine (CH3)2NH) is added to 1.000 liters of water, the pH of the wall increases above the value pH - 7.0 found for neutral solutions. Based on this, we may conclude that a) dimethyl amide is a Lewis base b) dimethylamide is a Bronsted base c) dimethylamide is an Arrhenius base d) both b and e) Both a and b and
What is the reaction that occurs when a small amount of sodium
hydroxide is added to the buffer?
Suppose a buffer solution is made from dimethylamine, (CH3)2NH, and the related salt, (CH3)2NH,CI. What is the reaction that occurs when a small amount of sodium hydroxide is added to the buffer? Select one or more: a. NaOH(aq) + (CH3)2NH (aq) - (CH3)2NHNa (aq) + H2O (0) b. (CH3)2NHCI (aq) + H20 (1) Bà (CH3)2NH2Cl(aq) + OH (aq) c. OH(aq) + (CH3)2NH2"...