Homework Answers
Though knowing densities of solvents used in separation process is most common and reliable method of understanding which is aqueous and which is organic layer, we can also depend on other ways. For example very little quantity of water can be added to separating funnel where two phases are present and we can observe whee the added water drop lets will move.
We can also add dyes that are exclusively soluble only in water and can observe the color, however this will modify the chemical nature of system,
Another way is to observe the relative volumes of resulted layers based on added volumes of organic solvent and water.
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6. You have two layers in a separatory funnel, an aqueous and an organic. If you...
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...
1) during liquid liquid extraction ( LLE) it is normal to use separatory funnel, and two...
1) during liquid liquid extraction ( LLE) it is normal to use separatory funnel, and two non- miscible phases of solvents , for ex: water as polar phase and ethyl acetate is the organic phase. density of water is 1,0 g/ ml, while density of ethyl acetate is 0.90 g/ ml at 25.0 celsius degrees. which of the two solvents will end up at the buttom of the separatory funnel? 2) ) during liquid liquid extraction ( LLE) it is...
please help :( to the separatory funnel and shake a rate the layers (Step 3), Return...
please help :(
to the separatory funnel and shake a rate the layers (Step 3), Return the mu we aqueous layer with 10 ml of dichloromethane observations in your laboratory notebook dichloromethane layers and return the ane layers and return them to the separatory funne With 10 mL of IM NaOH (Step 8). Describe w OF IM NaOH (Step 8). Describe what happened in yo . Separate the layers (Step 9) and extract the organ e times (Steps 10 -...
If you have an aqueous solution containing an organic acid salt and a neutral compound, which...
If you have an aqueous solution containing an organic acid salt and a neutral compound, which one will be extracted into ethyl acetate upon mixing in a separatory funnel?
2. The fluorene fluorenone reaction occurs in two immiscible liquid layers. Identity w solvent layer in...
2. The fluorene fluorenone reaction occurs in two immiscible liquid layers. Identity w solvent layer in a separatory funnel each compound will be the most soluble by putting Aqueous or (O) Organic under each compound below. 3 pts NaOH HCI AO - describe how you assigned compounds to the aqueous and organic layers above. 2pts
1)When you perform a liquid-liquid extraction using a separatory funnel, which of the following organic solvent...
1)When you perform a liquid-liquid extraction using a separatory funnel, which of the following organic solvent is on the bottom of the aqueous phase and which is on top? (write your answer by the solvent name) a) Ethyl acetate b) hexane c) Dichloromethane d) diethyl ether 2) If you are performing a liquid-liquid extraction and you have a mix of a carboxylic acid and a non-acidic compound, which combination of solvents would you use for the separation? a) dichloromethane/HCI b)...
a) After the reaction is completed, the reaction mixture is transfered to a separatory funnel. The layers are separated...
a) After the reaction is completed, the reaction mixture is
transfered to a separatory funnel. The layers are separated and the
organic layer is washed with each of the following: an equal amount
of saturand NaCl, satured NaHCO3, deionized H2O, and again with
saturated NaCl. This is an example of a "basic" work-up. Illustrate
what is being neutralized in this work up using a balanced
equation. (2 Marks)
b) The base used is NaHCO3. This base can be dangerous in...
Experiment 4C Directions Obtain three test tubes, each containing two layers. For each tube, you will...
Experiment 4C Directions Obtain three test tubes, each containing two layers. For each tube, you will be told the identity of the two layers, but you will not be told their relative positions. Determine experimentally which layer is organic and which layer is aqueous. Dispose of all thesemixtures into the waste container designated for halogenated organic wastes. After determining the layers experimentally, look up the densities of the various liquids in a handbook to see if there is a correlation...
8. After shaking and venting the separatory funnel, a student put the funnel on an iron...
8. After shaking and venting the separatory funnel, a student put the funnel on an iron ring. Worried that the product would evaporate, the student kept the hollow stopper on the funnel. After several minutes the student saw two layers had completely separated and opened the stopcock to drain the bottom layer, but no liquid drained out. What would you recommend that the student do?
The compounds below are dissolved in diethyl ether. The solution is transferred to a separatory funnel...
The compounds below are dissolved in diethyl ether. The solution is transferred to a separatory funnel and shaken with 10 % NaOH. (a) Which of the organic compounds (or their ions) will be in the aqueous layer? Draw the structure of each (for ions, clearly indicate the location of the charge). (b) Which of the organic compounds (or their ions) will be in the organic layer? Draw the structure of each (for ions, clearly indicate the location of the charge)....
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...
please help :(
to the separatory funnel and shake a rate the layers (Step 3), Return the mu we aqueous layer with 10 ml of dichloromethane observations in your laboratory notebook dichloromethane layers and return the ane layers and return them to the separatory funne With 10 mL of IM NaOH (Step 8). Describe w OF IM NaOH (Step 8). Describe what happened in yo . Separate the layers (Step 9) and extract the organ e times (Steps 10 -...
2. The fluorene fluorenone reaction occurs in two immiscible liquid layers. Identity w solvent layer in a separatory funnel each compound will be the most soluble by putting Aqueous or (O) Organic under each compound below. 3 pts NaOH HCI AO - describe how you assigned compounds to the aqueous and organic layers above. 2pts
1)When you perform a liquid-liquid extraction using a separatory funnel, which of the following organic solvent is on the bottom of the aqueous phase and which is on top? (write your answer by the solvent name) a) Ethyl acetate b) hexane c) Dichloromethane d) diethyl ether 2) If you are performing a liquid-liquid extraction and you have a mix of a carboxylic acid and a non-acidic compound, which combination of solvents would you use for the separation? a) dichloromethane/HCI b)...
a) After the reaction is completed, the reaction mixture is
transfered to a separatory funnel. The layers are separated and the
organic layer is washed with each of the following: an equal amount
of saturand NaCl, satured NaHCO3, deionized H2O, and again with
saturated NaCl. This is an example of a "basic" work-up. Illustrate
what is being neutralized in this work up using a balanced
equation. (2 Marks)
b) The base used is NaHCO3. This base can be dangerous in...
The compounds below are dissolved in diethyl ether. The solution is transferred to a separatory funnel and shaken with 10 % NaOH. (a) Which of the organic compounds (or their ions) will be in the aqueous layer? Draw the structure of each (for ions, clearly indicate the location of the charge). (b) Which of the organic compounds (or their ions) will be in the organic layer? Draw the structure of each (for ions, clearly indicate the location of the charge)....
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