Homework Answers
The compounds to be separated could be acidic, basic and neutral. The acidic compound will form salt with a base (e.g., NaOH) and basic compound with an acid (e.g., HCl). The water soluble ionic salts are insoluble in organic solvents. Whereas, the neutral compound would neither react with acid nor with base and hence, will remain in the organic layer. Hence, physical separation can be achieved by using water and an organic solvent.
Further, the distribution between the aqueous and organic phases can be quantitatively measured using the distribution coefficient.
K = solubility of organic (g/100 mL)/ solubility of water (g/100 mL)
The distribution coefficient K is the ratio of the concentrations of the solute in the two different solvents. The larger the value of K the easier is the separation. Hence, the correct solvent system can be chosen for given molecule or mixtures for extraction from two solvent.
To do any extraction, you’ll need two liquids or solutions. They must be insoluble in each...
To do any extraction, you’ll need two liquids or solutions. They must be insoluble in each other. a. What does it mean to have 2 insoluble liquids or solutions? b. I have listed twelve liquids and solutions below. Identify if each solution is considered aqueous or organic. Water, acetone, 1.0 M NaOH, 1.0 M HCl, diethylether, brine (saturated sodium chloride in water), dichloromethane, 10% sodium bicarbonate solution, ethyl acetate, chloroform, ethanol, hexane. 2. Which of the organic liquid(s) from 1b...
Pre-Lab Questions of Exp.4 Extraction (liquid-liquid and liquid –solid) Define extraction? How you choose solvent for...
Pre-Lab Questions of Exp.4 Extraction (liquid-liquid and liquid –solid) Define extraction? How you choose solvent for proper extraction? What is the difference between liquid-liquid and liquid-solid extraction? What are nutrients? Give two examples
Explain in a few sentences how extraction can be used to separate an organic compound from sodium chloride.
06 Lab 3a Separation.pdfQuestion 1 of prelabExplain in a few sentences how extraction can be used to separate an organic compound from sodium chloride.
Prelab
1. Explain in a few sentences how extraction can be used to separate an organic compound from
sodium chloride.
2. Why is the CH2Cl2 layer the bottom layer in a CH2Cl2 / aqueous NaHCO3 extraction? In this
experiment, what does the CH2Cl2 layer contain? What does the aqueous NaHCO3 layer
contain?
3. In general, how...
1. Explain how a fractionating column increases the separation of two liquids. 2. What is an...
1. Explain how a fractionating column increases the separation of two liquids. 2. What is an azeotrope? Do you think the mixture used in the lab is an example of an azeotrope? Explain. 3. Explain how the boiling point of a liquid is affected by the addition of a non-volatile solute (hint: it is a colligative property). Is the temperature above such solution lower, higher or the same as the pure liquid? Explain why. 4. You were asked to record...
In general, when hydrocarbons like oil are added to water, the two liquids Choose... - because...
In general, when hydrocarbons like oil are added to water, the two liquids Choose... - because hydrocarbons are Choose... and water is Choose... not volatile less dense polar
We used the technique of extraction in this lab. After extraction, what was left in solution?...
We used the technique of extraction in this lab. After extraction, what was left in solution? Why is it acceptable for those chemicals to be left to sit for a week? Think about the possible reactions that would or would not occur during the week? In our extraction, we used NaCl solution. Why did we choose to use that vs. water? In this experiment, we did a Fischer Esterification using excess acetic acid, isopentyl alcohol, and sulfuric acid to form...
Choose one element of the Tabernacle amd explain what it was, how it was used, and...
Choose one element of the Tabernacle amd explain what it was, how it was used, and its significance im its orginal and later text.
Complete the following with concise answers: Mercury and cyanide are two chemicals used in the extraction...
Complete the following with concise answers: Mercury and cyanide are two chemicals used in the extraction of gold from ore. Describe how these two chemicals differ in terms of volatility and persistence. How do these chemicals impact their environmental fate and transport? In the assigned article “Mountaintop Removal Mining: Digging Into Community Health Concerns,” manganese and hydrogen sulfide are identified as two chemicals of public health concern. Search online for a Material Safety Data Sheet (MSDS) on each of these...
how to separate two neutral organic compunds using extraction techniques
how to separate two neutral organic compunds using extraction techniques
Explain how you could separate benzoic acid and phenol using an acid-base extraction
Explain how you could separate benzoic acid and phenol using an acid-base extraction
In general, when hydrocarbons like oil are added to water, the two liquids Choose... - because hydrocarbons are Choose... and water is Choose... not volatile less dense polar
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