Question

1. To see plant pigment extracts or pigments such as carotene on the TLC plate? 2....

1. To see plant pigment extracts or pigments such as carotene on the TLC plate?

2. When recrystallizing a material if too much solvent is used, how might this impact the percent recovery?

3. For an extraction to be successful, the organic layer should be immiscible or miscible with the aqueous layer (so that a separation can take place)?

4. When recrystallizing a material if too much solvent is used, how might this impact the percent recovery?

0 0
Add a comment Improve this question Transcribed image text
Request Professional Answer

Request Answer!

We need at least 10 more requests to produce the answer.

0 / 10 have requested this problem solution

The more requests, the faster the answer.

Request! (Login Required)


All students who have requested the answer will be notified once they are available.
Know the answer?
Add Answer to:
1. To see plant pigment extracts or pigments such as carotene on the TLC plate? 2....
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Similar Homework Help Questions
  • 1) A student develops their TLC plate and places it under a UV light, but nothing...

    1) A student develops their TLC plate and places it under a UV light, but nothing appears. What mistake might the student have made? a) Spotted the compound below the level of eluent b) Spotted the compound above the level of eluent c) Used a sample that was too concentrated d) Used too much sample 2)Thin layer chromatography, TLC, is commonly used to monitor reactions to completion. Using this technique, what would indicate to a student that the reaction is...

  • How would a mixture of naphthalene and benzophenone behave on a TLC plate with hexanes /...

    How would a mixture of naphthalene and benzophenone behave on a TLC plate with hexanes / acetone as the eluent? Compare the polarity of these two compounds. Outline the most commonly used procedure for the purification of an impure solid material using the technique of recrystallization. Why is acetone such a popular solvent? Point out one drawback in terms of safety consid­erations. Your final product might be impure since you suspect decomposition might have occurred. When determining the melting point...

  • K2CO3 1.5 H20 Br он heat 2,3-dibromocinnamic acid trans-1-bromo-2-phenylethene Compound MW mp (C)bp (C) density (g/ml)...

    K2CO3 1.5 H20 Br он heat 2,3-dibromocinnamic acid trans-1-bromo-2-phenylethene Compound MW mp (C)bp (C) density (g/ml) mol) 2,3-dibromocinnamic acid 307.97 93-95 (threo) n'a n a 202-204 (erythro)E K CO.1.5H:O1 methylene chloride 138.21 84.93 56.11 891 na n a n'a 39.6 n a n a 1.33 n a 3 MKOH 2. a. What is the by-product formed in this reaction (not shown in given reaction equation)? b. What is the purpose of adding 3 M KOH at the beginning of the...

  • Name: Date: Separation of Acid/Base/Neutral compounds using liquid-liquid extraction OCH CHO HN Benzocaine Molecular Weight: 165.19...

    Name: Date: Separation of Acid/Base/Neutral compounds using liquid-liquid extraction OCH CHO HN Benzocaine Molecular Weight: 165.19 Melting Point: 88-90 °C 1,1-biphenyl Molecular Weight: 154.21 Melting Point: 68-70 °C trans-cinnamic acid Molecular Weight: 148.16 Melting Point: 132-135 °C Question 1: Identify the following compounds as Acid, Base or Neutral. (2 points) a. Benzocaine: b. Biphenyl: c. Trans-cinnamic acid: (2 points) _ (2 points) Question 2: Draw the structure in the box (5 points each): NaOH OCH,CH, HCM NaOHA HC form. Ples...

  • You will apply what you have learned earlier in the semester when performing the Acid-Base Extraction...

    You will apply what you have learned earlier in the semester when performing the Acid-Base Extraction experiment to perform a different separation: that of an organic neutral compound and organic base. You will also need to purify and characterize these compounds. You will have one lab period to execute your plan for separating the assigned mixture given below. There will be a 1:1 (by mass) mixture placed in the lab: 1,4-dichlorobenzene/ethyl 4-aminobenzoate. You will take approximately 1 g of your...

  • Construct a flow chart describing the seperation of the mixture and the isolation of each compound...

    Construct a flow chart describing the seperation of the mixture and the isolation of each compound in this experiment. (Lab steps/procedures includes for reference) 4. Construct a flow chart describing the separation of the mixture and the isolation of each compound in this experiment. A commonly used method of separating a mixture of organic compounds is known as liquid-liquid extraction. Most reactions of organic compounds require extraction at some stage of product purification. In this experiment you will use extraction...

  • Need help on providing reactions that describe the acid-base extraction and neutralization processes used in this exper...

    Need help on providing reactions that describe the acid-base extraction and neutralization processes used in this experiment. Provide a statement of solubility of each starting material and product. The experiment to be performed this week involves liquid-liquid extraction using a separatory funnel. Read chapter 15 in Zubrick to familiarize yourself with the use of the glassware for extraction and washing. Acid/Base Extraction Liquid-liquid extraction is a technique that can be used to physically separate two substances that have varying solubility...

  • Part A 1. If you had used more methylene chloride in each step, you could have...

    Part A 1. If you had used more methylene chloride in each step, you could have extracted more caffeine. Explain why you did not. Hint - What step would have taken longer (Hint: not drying). PART A Mass of Beaker & Caffeine Mass of Beaker 167.750g 67.6809 Mass of Caffeine 0.0 75 Calculations. Show your work and circle the answers. Mass of caffeine recovered: 012919 b) Actual:.07 % caffeine recovered: a) Predicted: 9 7:213% b) Actual: 92.105% PART B Unknown...

  • Introduction: The technique used to separate an organic compound from a mixture of compounds is called...

    Introduction: The technique used to separate an organic compound from a mixture of compounds is called Extraction. Extraction process selectively dissolves one or more of the mixture compounds into a suitable solvent. The solution of these dissolved compounds is referred to as the Extract. Here the organic solvent dichloromethane is used to extract caffeine from an aqueous extract of tea leaves because caffeine is more soluble in dichloromethane (140 mg/ml) than it is in water (22 mg/ml). However, there are...

  • 1 - Provide a balanced equation for this reaction 2 - Provide a mechanism for the...

    1 - Provide a balanced equation for this reaction 2 - Provide a mechanism for the transformation of cyclohexanol into cyclohexanone 3 - Provide a flow chart for the workup procedure for isolating cyclohexane from all the by-products, making sure to note in which layer you expect to find your product in each extraction. 4 - Provide the theoretical yield of cyclohexane in this experiment. PROCEDURE OXIDATION OF CYCLOHEXANOL TO CYCLOHEXANONE Set up a water bath as the heat source...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT