Based on the readings and lecture on emulsions, and the procedures for this lab answer the following question. What is the dispersed phase in the simple vinaigrette? Air Oil Water Egg
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Based on the readings and lecture on emulsions, and the procedures for this lab answer the following question.
What is the dispersed phase in the simple vinaigrette?
Air
Oil
Water
Egg
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Solved in 2 steps
- 10. Describe how you can decide whether your recrystallized trphenylmethanol is pure or not ?10. Fractional Distillation: This lab was viewed via a video and described in detail in lab class. You are distilling apart hexane (bp = 68) and toluene (bp 110). Your boiling point for the first fraction is 48°C. Why is the boiling point so low (most likely reason)? !! azeotrope with water non-resonance of hexane O resonance of toluene student error O seriously impaired thermometerDraw a five-step Schematic diagram of the procedure on how to separate pure crystals of CuSO4 , Alum and Benzoic acid. (Draw only 1 schematic diagram for the three samples)
- A mixture of the two compounds shown below is dissolved in ether. Using the information given in the experiment, select all the correct statements regarding the extraction and isolation of the two compounds. lose 0000 X OH A. X can be extracted from the organic layer using sodium hydroxide. B. Y can precipitate out of the aqueous layer by the addition of sodium hydroxide to the salt of Y. C. X can precipitate out of the aqueous layer by the addition of sodium hydroxide to the salt of X. D. Y can be extracted from the organic layer using sodium hydroxide.(extraction, reactive extraction, recrystallization). Write a few sentences for each technique explaining themMany operations in the chemical laboratory use “salting out” in the procedure. What do the purpose of this technique?
- If 80% of a desired compound is extracted into the organic phase in each step (leaving 20% in the aqueous layer), how many extractions are necessary to ensure that at least 99% of the compound has been recovered in the organic phase? 1 extraction 2 extractions 3 extractions 4 extractionsYou will be completing the extraction of caffeine with dichloromethane and water. In which solvent will the caffeine be found after the layers are mixed, and is this the top or bottom layer? A. Dichloromethane - top layer B. Dichloromethane - bottom layer C. Water - top layer D. Water - bottom layer4. Suppose you have a mixture of saturated aqueous sodium chloride (brine) and your 2-bromo-2-methylbutane product in a separatory funnel. Use densities to predict which phase will be the top layer in the funnel. a. 2-bromo-2-methylbutane (organic phase) b. saturated sodium chloride (aqueous phase) c. hard to predict since densities are both very close to 1.18 g/mL d. there would only be one phase since the substances are miscible
- Starting from crude clove oil, draw flow charts to illustrate the extraction steps. Please answer very soon will give rating surelyWhat physical property determines which solvent sinks to the bottom when performing a liquid-liquid extraction? A. Refractive Index B. Solubility C. Density D. Boiling PointWhat is the purpose of including a melting point in a procedure? A) As a method of purification - We can purify a substance. B) As a method of encouraging synthesis - Reagents are always more reactive in the liquid state. C) As a method of encouraging a substance to dissolve - Free molecules in the liquid state can make interactions and dissolve in the solvent easier. D) As a method of characterization We can identify an unknown substance. -- O A OD