You have an aqueous extract that has been dried and you are going to perform a liquid/liquid separation. You must use a mixture of two solvents: a. Which solvent mixture would you use? Available solvents: cyclohexane, chloroform, ethanol, methanol, hexane, acetone. b. What compounds would you expect to be in each phase
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You have an aqueous extract that has been dried and you are going to perform a liquid/liquid separation. You must use a mixture of two solvents:
a. Which solvent mixture would you use? Available solvents: cyclohexane, chloroform, ethanol, methanol, hexane, acetone.
b. What compounds would you expect to be in each phase?
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- 5. When the ether is dissolved, add 10 grams of NaCl and shake gently until all the NaCl dissolves.6. Place the mixture in a separatory funnel. Allow to stand and separate into two layers. Measure the volume of the upper ether layer using a graduated cylinder.7. How much of the ether is salted out by the NaCl? _________________A 300-mL aqueous solution containing a 30.0g of compound A is to be extracted with ether. The solubility of compound A in ether at room temperature is 20.0g/mL and in water is 8.00g/mL. Calculate the weight of the compound that would be recovered by extraction with (a) two 150-ml portions of ether (b) one 300-mL portion ether. Which portion gives a higher recovery for compound A?A student rushed through this experiment. Describe the effect that the following procedural changes would have on the percent recovery of acetanilide. Briefly explain the basis of each answer.(a) Rather than adding 0.5-mL portions of boiling solvent to the acetanilide, the student added 5-mL portions of boiling solvent.(b) The student did not pre-heat the gravity filtration apparatus.(c) The student forgot to cool 5 mL of solvent in Part 5 and washed the crystals with room-temperature solvent.
- A particular extraction proceeds with a distribution coefficient of 6. The system consists of 3.5 g of compound X dissolved in 60 mL of water (solvent 1). The effectiveness of three 60-mL extractions with n-hexane (solvent 2) is compared with one 180-mL extraction with n-hexane. Questions: 1. How many grams of compound X will be recovered in -hexane in the first extraction? 2. How many grams of compound X will be recovered in water in the first extraction? 3. How many grams of compound X will be recovered in n-hexane in the third extraction? 4. How many grams of compound X will be recovered in water in the third extraction?2.3 In an experiment the essential oils from herbs, were extracted with water. Explain how you will separate the oils from the water using liquid-liquid extraction. Discuss the procedure, equipment and extraction solvent choice.Can you show me how to solve this Experiment 3: Wet granulation Rx Calcium carbonate 135 mg Sig. Prepare 5 tabletsMagnesium carbonate 100 mgSodium chloride 50 mg10% Starch paste qsMagnesium stearate 1%Dried cornstarch 1%* The prescription is to be prepared as follows: 1. Prepare the 10% starch paste by making a slurry with a small amount of water. To this slurry, add boiling water to the final volume and stir until a translucent gel has formed.2. In a mortar, blend the calcium carbonate, magnesium carbonate and sodium chloride. Gradually with kneading and mixing, add the starch paste until a mass is formed that willball and stick together when squeezed, but will not be sticky and gummy.3. Pass this mass through sieve # 40 and collect on a paper-lined tray. Dry the granulation in the oven set at 55 degrees Celsius then pass through sieve #40 again then weigh.4. Calculate the weight of lubricant to be added (mixture equal amounts of dried cornstarch and magnesium stearate) then blend.5.…
- please i need your help A particular extraction proceeds with a distribution coefficient of 6. The system consists of 3.5 g of compound X dissolved in 60 mL of water (solvent 1). The effectiveness of three 60-mL extractions with n-hexane (solvent 2) is compared with one 180-mL extraction with n-hexane. Questions: 1. How many grams of compound X will be recovered in n-hexane in the third extraction? 2. How many grams of compound X will be recovered in water in the third extraction? 3. How many grams of compound X will be recovered in -hexane in the first extraction? 4. How many grams of compound X will be recovered in water in the first extraction?Each of the student statements below is wrong. Explain why they are not correct. (a) All my compound dissolved right away in the small amount of solvent I added at room temperature, and I didn’t need to heat it at all. This means I’m going to get lots of pure compound out. (b) I did a recrystallization of naphthalene and my percent recovery was very high (99%), so I must have pure product. (c) When you’ve dissolved all your compound in hot solvent, and you’re in a hurry, it’s ok to just place it straight into the ice bath.4. In a distillation of a mixture of acetone (bp. 56°C and dichloromethane bp. 40°C), a fraction averaging 48°C was collected that never exhibited a plateau temperature. Show using temperature as an indicator of purity what the % of acetone is in this fraction. (Hint: this is similar to the question of refractive index in the last assignment) Please answer very soon will give rating surely
- Which of the ff is not true about recrystallization? a. acetanalide recrystallized only at cold temp b. congo red stain is removed by using animal charcoal c. acetanalide can be dissolved in hot h20An organic chemistry laboratory Extraction; the extraction of crude naphtalene- benzoic acid mixture. Naphthalene is a suspect carcinogen and is toxic to aquatic life. Find an alternative pair of molecules that adhere better to the principles of green chemistry and can be separated by extraction using green' solvents. (kindly answer fully)What characteristics does a mixture need to have so that it could be separated by: A) Distillation, B) Centrifugation. C) Separating funnel?