Homework Answers
Primary alcohol and secondary alcohol
Lucas reagents (anhydrous ZnCl2+HCl) are used to distinguish primary, secondary and tertiary alcohols. This test is known as Lucas test.
Primary alcohols do not react with Lucas reagents.White turbudity appears after 5 to 10 minutes when Lucas reagent reacts with secondary alcohols.
Aldehyde and ketone test
The Silver Mirror Test
This test makes use of Tollen's reagent which contains the complex [Ag(NH3)2]+.
Aldehyde - Upon heating with Tollen's reagent solid silver metal is produced as Ag+ is reduced to Ag.
Ketone - No reaction occurs.
Test of ketone and methyl ketone
Iodoform test
methyl ketone undergoes oxidation by sodium hypoiodite (NaOI) to give a yellow ppt. of iodoform. But ketone does not respond to this test
Test of ketone and alcohol
Add an oxidizing agent, e.g. Jones reagent (Chromium trioxide (CrO3) in sulfuric acid) to a sample of both an heat it. The solution will turn from orange (Cr (VI))to green (Cr (III))in the test tube containing the alcohol (due to oxidation of the alcohol) but not the ketone (they cannot be oxidized).
Add Answer to:
What reagent would you use to distinguish between the following pairs of compounds? Indicate what...
How can you distinguish between the following pairs, tell what reagent to use and what would...
How can you distinguish between the following pairs, tell what reagent to use and what would you observe? 1) Isobutyl alcohol and tert- butyl alcohol 2) 1-Propanol and 1-heptanol 3) Cyclohexanol and cyclohexane
What test would you use to distinguish between the members of the following pairs of carbohydrates?...
What test would you use to distinguish between the members of the following pairs of carbohydrates? Describe chemistry and observations behind the tests you will use to distinguish between these pairs of carbohydrates. 1. Glycogen and Starch 2. Pentose (Arabinose) and Glucose 3. Sucrose and Lactose 4. Glucose and Fructose
Use the information below to fill in the charts on the 1st screenshot and then answer...
Use the information below to fill in the charts on the 1st
screenshot and then answer the questions on the 2nd screenshot.
UNKNOWN #: 399
2,4-dinitrophenylhydrazine Test: solution remains
colorless
Fehling’s Test: solution remains colorless
Lucas test: solution became cloudy immediately when
reagent was added
Tollen’s test: solution remains colorless
Iodoform Test: solution remains colorless
Bordwell-Wellman Test: no rxn was observed
UNKNOWN #: 499
2,4-dinitrophenylhydrazine Test: solution changed to a
yellow-orange color with some precipitation
Fehling’s Test: solution changed to...
Show how you would use simple chemical tests to distinguish between the following pairs of compounds....
Show how you would use simple chemical tests to distinguish between the following pairs of compounds. In each case, describe what you would do and what you would observe. a. butan-1-ol and butan-2-ol b. butan-2-ol and 2-methylbutan-2-ol c. cyclohexanol and cyclohexene d. cyclohexanol and cyclohexanone e. cyclohexanone and 1-methylcyclohexanol
Organic Chemistry Lab Structure & Solubility: Explain how you could distinguish between the following pairs of...
Organic Chemistry Lab Structure & Solubility: Explain how
you could distinguish between the following pairs of compounds?
Which compounds would be water soluble?
STRUCTURE AND SOLUBILITY Name: Lab Section: I. Esplin how you could distinguish between the following pairs of compounds. Which compounds would be water soluble? 1. Butane and 2-chlorobutane 2. Butane and 1-butanol 3. 1-butanol and 2-butanol 4. 1-butanol and butanoic acid
properties of alcohol 5. Using the tests performed in this experiment, how could you distinguish between...
properties of alcohol
5. Using the tests performed in this experiment, how could you distinguish between the following pairs of compounds? Tell what reagent or test you would use and what you would observe. 1-Butanol and 2-butanol a) b) C Isobutyl alcohol and tert-butyl alcohol 1-Propanol and 1-heptanol Cyclohexanol and cyclohexane d)
What H-NMR information would you use to distinguish between the following pairs of compounds? 2. and...
What H-NMR information would you use to distinguish between the following pairs of compounds? 2. and and b а and Он н H Но and c) d)
If you use a permanganate test to distinguish between cyclohexanie and cyclohexene, in which would the...
If you use a permanganate test to distinguish between cyclohexanie and cyclohexene, in which would the purple color of KMNO4 persist? 11. Only one aldehyde and only one primary alcohol gives positive iodoform test. What are their structures? 12. Which of the following compounds would give a positive iodoform test? Yes/No Yes/No (a) Yes/No Yes/No (b)
10. If you use a permanganate test to distinguish between cyclohexane and cyclohexene, in which would...
10. If you use a permanganate test to distinguish between cyclohexane and cyclohexene, in which would the purple color of KMNO4 persist? 11. Only one aldehyde and only one primary alcohol gives positive iodoform test. What are their structures? 12. Which of the following compounds would give a positive iodoform test? i Yes/No Yes/No a) Yes/No (d) (b) Yes/No
- Suggest two different chemical tests that would help distinguish between the following pairs of...
- Suggest two different chemical tests that would help distinguish between the following pairs of compounds. State what you would do and what you would see: a) benzaldehyde and benzyl alcohol b) 2-pentanone and 3- pentanone c)propanal and diethyl ether d) acetophenone and phenylacetaldehyde e)Propanal and propanoic acid -Suggest an IR frequency that would help distinguish between each pair of the previous compounds
What test would you use to distinguish between the members of the following pairs of carbohydrates? Describe chemistry and observations behind the tests you will use to distinguish between these pairs of carbohydrates. 1. Glycogen and Starch 2. Pentose (Arabinose) and Glucose 3. Sucrose and Lactose 4. Glucose and Fructose
Use the information below to fill in the charts on the 1st
screenshot and then answer the questions on the 2nd screenshot.
UNKNOWN #: 399
2,4-dinitrophenylhydrazine Test: solution remains
colorless
Fehling’s Test: solution remains colorless
Lucas test: solution became cloudy immediately when
reagent was added
Tollen’s test: solution remains colorless
Iodoform Test: solution remains colorless
Bordwell-Wellman Test: no rxn was observed
UNKNOWN #: 499
2,4-dinitrophenylhydrazine Test: solution changed to a
yellow-orange color with some precipitation
Fehling’s Test: solution changed to...
Organic Chemistry Lab Structure & Solubility: Explain how
you could distinguish between the following pairs of compounds?
Which compounds would be water soluble?
STRUCTURE AND SOLUBILITY Name: Lab Section: I. Esplin how you could distinguish between the following pairs of compounds. Which compounds would be water soluble? 1. Butane and 2-chlorobutane 2. Butane and 1-butanol 3. 1-butanol and 2-butanol 4. 1-butanol and butanoic acid
properties of alcohol
5. Using the tests performed in this experiment, how could you distinguish between the following pairs of compounds? Tell what reagent or test you would use and what you would observe. 1-Butanol and 2-butanol a) b) C Isobutyl alcohol and tert-butyl alcohol 1-Propanol and 1-heptanol Cyclohexanol and cyclohexane d)
What H-NMR information would you use to distinguish between the following pairs of compounds? 2. and and b а and Он н H Но and c) d)
If you use a permanganate test to distinguish between cyclohexanie and cyclohexene, in which would the purple color of KMNO4 persist? 11. Only one aldehyde and only one primary alcohol gives positive iodoform test. What are their structures? 12. Which of the following compounds would give a positive iodoform test? Yes/No Yes/No (a) Yes/No Yes/No (b)
10. If you use a permanganate test to distinguish between cyclohexane and cyclohexene, in which would the purple color of KMNO4 persist? 11. Only one aldehyde and only one primary alcohol gives positive iodoform test. What are their structures? 12. Which of the following compounds would give a positive iodoform test? i Yes/No Yes/No a) Yes/No (d) (b) Yes/No
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