Homework Answers
During extraction process, vaporization tends to get produced inside the funnel because of high vapour pressure of organic liquids. Therefore, funnel must be vented during the shaking process to relieve excess pressure.
Why do we "vent" multiple times when using a separatory funnel? To speed-up the reaction by...
Why do we "vent" multiple times when using a separatory funnel? To speed-up the reaction by decreasing the pressure in the separatory tunnel To allow air into the system to help separate layers. To prevent the fumes from re-entering the liquid state. To release excess gases.
Why is it important to open the stopcock on the separatory funnel when extracting from one...
Why is it important to open the stopcock on the separatory funnel when extracting from one phase (say, organic phase,) into another phase (say, aqueous phase)?
While performing a liquid/liquid extraction in a separatory funnel, a student placed the separatory funnel on...
While performing a liquid/liquid extraction in a separatory funnel, a student placed the separatory funnel on the ring stand right after shaking it. The student forgot to take the stopper off the top of the separatory funnel after shaking it and before draining one of the layers. Why is this a bad idea?
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?
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...
In Exp #2 you added NaOH(aq) to the separatory funnel which contained benzoic acid and naphthalene...
In Exp #2 you added NaOH(aq) to the separatory funnel which contained benzoic acid and naphthalene in dichloromethane. Explain the important process that happened at the molecular level and bulk level in this step. Include solubility considerations in your answer. Give your best answer in four sentences or less.
Indicate where the organic phase was detected (above or below) in a separatory funnel in a...
Indicate where the organic phase was detected (above or below) in a separatory funnel in a liquid / liquid extraction where the solvents are: a. chloroform with water b. hexane with water Explain your reasoning.
When the mixture of biodiesel and glycerol is in separatory funnel, glycerol appears denser than biodiesel....
When the mixture of biodiesel and glycerol is in separatory funnel, glycerol appears denser than biodiesel. What can be the chemical reasoning of the observation?
1) A student leaves his product sitting with the bicarbonate solution in the separatory funnel and...
1) A student leaves his product sitting with the bicarbonate solution in the separatory funnel and goes to go eat a snack for 30 minutes. When they get back they no longer have two layers. Explain.
6. You have two layers in a separatory funnel, an aqueous and an organic. If you...
6. You have two layers in a separatory funnel, an aqueous and an organic. If you don't know the densities of each of your aqueous and organic phases, what is one way to determine which is which?
Why do we "vent" multiple times when using a separatory funnel? To speed-up the reaction by decreasing the pressure in the separatory tunnel To allow air into the system to help separate layers. To prevent the fumes from re-entering the liquid state. To release excess gases.
1) A student leaves his product sitting with the bicarbonate solution in the separatory funnel and goes to go eat a snack for 30 minutes. When they get back they no longer have two layers. Explain.
6. You have two layers in a separatory funnel, an aqueous and an organic. If you don't know the densities of each of your aqueous and organic phases, what is one way to determine which is which?
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