Homework Answers
Emulsion:
Emulsion is a colloidal dispersion of one liquid in another liquid.
Emulsions may be broken by following methods
- chemical,
- electrolytic,
- physical methods.
To break the emulsion in a separation funnel is known as resolution.
To beak emulsion; first leave the separation funnel to settle the emulsion for 1 – 2 hours.
If emulsion will not go then add some electrolyte like NaCl or
Add Answer to:
4. When a separatory funnel is shaken too vigorously, an emulsion may form. What would be...
2. When using the separatory funnel you may have observed a oily emulsion between the aqueous and...
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...
Post-Lab 3. You vigourously shake a separatory funnel, and notice an emulsion forming. What can you...
Post-Lab 3. You vigourously shake a separatory funnel, and notice an emulsion forming. What can you do to help break up the emulsion? 4. Complete the following acid-base reaction and provide the keq. Is sodium bicarbonate (NaHCO) a suitable base in this situation? + NaHCO, 5. A mixture of benzoic acid and a neutral nonpolar compound is dissolved in ether and mixed thoroughly with aqueous sodium bicarbonate. What is the organic chemical species that is present in the ether layer?...
1. What is an emulsion? How would an emulsion form during a liquid/liquid extraction? 2. Draw...
1. What is an emulsion? How would an emulsion form during a liquid/liquid extraction? 2. Draw the structure for caffeine. What part of caffeine is basic? 3. What form is caffeine in when dissolved in soda? Draw the structure.
Post lab Questions: 1. What is an emulsion? How would an emulsion form during a liquid/liquid...
Post lab Questions: 1. What is an emulsion? How would an emulsion form during a liquid/liquid extraction? 2. Draw the structure for caffeine. What part of caffeine is basic? 3. What form is caffeine in when dissolved in soda? Draw the structure.
You have a separatory funnel that contains a solution of 4-methyl benzoic acid and ethoxybenzene in...
You have a separatory funnel that contains a solution of 4-methyl benzoic acid and ethoxybenzene in methylene chloride. By adding KOH (aq) into this solution for extraction, what compound(s) would be expected to form in the aqueous layer? Write the equation. Compound X has a hexane/water distribution coefficient of 2.0. (a) Does compound X have a higher or lower solubility in hexane comparing to water? (b) How much of a 3.0 g sample of compound X dissolved in 100 ml...
What is the reaction product(s) of oleic acid & sodium methoxide? Show the structure(s). Part A:...
What is the reaction product(s) of oleic acid & sodium methoxide? Show the structure(s). Part A: Acid Catalyzed Fischer Esterification of Free Fatty Acids Add 20 mL of canola oil and a magnetic stir bar to a 125-mL Erlenmeyer flask, and place the flask on a magnetic stirring plate. Add 2–3 mL of methanol and up to three drops of concentrated sulfuric acid Perform this step with caution, as this is a strong acid! Immerse a thermometer into the reaction...
MSISTRY 203-204 Grganic Chemistry Lab Manual 3 4 EXPERIMENT #9 The Preparation of t Butyl Chloride A tertiary carbonium ion is more rapidly formed than a secondary or primary carbonium ion. Onc...
MSISTRY 203-204 Grganic Chemistry Lab Manual 3 4 EXPERIMENT #9 The Preparation of t Butyl Chloride A tertiary carbonium ion is more rapidly formed than a secondary or primary carbonium ion. Once formed, a tertiary carbonium ion is stabilized by charge dispersal to a greater extent than a secondary or primary carbonium ion. It therefore has a longer life expectancy. Primary carbonium ions, protons, may exist in solution only in solvated form have any free existence, they dehydration reaction and...
When life's challenges become too great, depression may arise. If you feel lost and alone, you...
When life's challenges become too great, depression may arise. If you feel lost and alone, you need to reach out to others for support. Explain what you feel would be a wise and healthy way to proceed, in order to address and "handle" these types of feelings, and what you would do for gaining support during these times?
Would the methylene chloride layer be above or below the experiment? Justify your answer. 1. aqueous layer in today...
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...
Case study 21.5 (p.494) When Tomasina was later discharged from the hospital, her form may have...
Case study 21.5 (p.494) When Tomasina was later discharged from the hospital, her form may have stated which of these conditions? CVA TIA TBI VZV Case study 21 scenario (p.494) was only two blocks away. Tomasina was in such a hurry, and it was so close, she didn't think she really needed to rummage through the garage for her bike helmet. She jumped on her bike and peddled quickly toward the store. From out of nowhere, a car sped by-...
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...
Post-Lab 3. You vigourously shake a separatory funnel, and notice an emulsion forming. What can you do to help break up the emulsion? 4. Complete the following acid-base reaction and provide the keq. Is sodium bicarbonate (NaHCO) a suitable base in this situation? + NaHCO, 5. A mixture of benzoic acid and a neutral nonpolar compound is dissolved in ether and mixed thoroughly with aqueous sodium bicarbonate. What is the organic chemical species that is present in the ether layer?...
Post lab Questions: 1. What is an emulsion? How would an emulsion form during a liquid/liquid extraction? 2. Draw the structure for caffeine. What part of caffeine is basic? 3. What form is caffeine in when dissolved in soda? Draw the structure.
You have a separatory funnel that contains a solution of 4-methyl benzoic acid and ethoxybenzene in methylene chloride. By adding KOH (aq) into this solution for extraction, what compound(s) would be expected to form in the aqueous layer? Write the equation. Compound X has a hexane/water distribution coefficient of 2.0. (a) Does compound X have a higher or lower solubility in hexane comparing to water? (b) How much of a 3.0 g sample of compound X dissolved in 100 ml...
MSISTRY 203-204 Grganic Chemistry Lab Manual 3 4 EXPERIMENT #9 The Preparation of t Butyl Chloride A tertiary carbonium ion is more rapidly formed than a secondary or primary carbonium ion. Once formed, a tertiary carbonium ion is stabilized by charge dispersal to a greater extent than a secondary or primary carbonium ion. It therefore has a longer life expectancy. Primary carbonium ions, protons, may exist in solution only in solvated form have any free existence, they dehydration reaction and...
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...
Case study 21.5 (p.494) When Tomasina was later discharged from the hospital, her form may have stated which of these conditions? CVA TIA TBI VZV Case study 21 scenario (p.494) was only two blocks away. Tomasina was in such a hurry, and it was so close, she didn't think she really needed to rummage through the garage for her bike helmet. She jumped on her bike and peddled quickly toward the store. From out of nowhere, a car sped by-...
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