An unknown substance had a positive reaction with 2,4-DNP test. The unknown reacted like a secondary...
An unknown substance had a positive reaction with 2,4-DNP test. The unknown reacted like a secondary alcohol with the Lucas reagent. It was negative with the Iodoform and Benedict's test. What possible functional groups does the unknown contain?
-primary alcohol
-secondary alcohol
-tertiary alcohol
-ketone
-aldehyde
-methyl
-none tested
I answered ketone and aldehyde. I did not receive full credit. I also answered secondary, tertiary, ketone, and acetone, but did not receive full credit.
Homework Answers
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An unknown substance had a positive reaction with 2,4-DNP test.
The unknown reacted like a secondary...
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...
3. Tollen's Test Result + or- Functional Group Compound Observations/Conclusions acetone propanal unknown 4. Lucas Test...
3. Tollen's Test Result + or- Functional Group Compound Observations/Conclusions acetone propanal unknown 4. Lucas Test Functional Group Alcohol Result Compound Observations Conclusions 1-butanol 2-butanol 2-methyl-2-propanol unknown 5. Iodoform Test Result +or-) Active Methyl? Compound Observations/Conclusions 2-pentanone 3-pentanone 1-butanol 2-butanol unknown
FUNCTIONAL GROUPS IDENTIFICATION LAB Professor Burton decided to select two unknowns from Group 1 (299 &...
FUNCTIONAL GROUPS IDENTIFICATION LAB
Professor Burton decided to select two unknowns from Group 1
(299 & 399) and two unknowns from Group 2 (499 & 699).
Below are the descriptions of his observations/results for each
unknown.
UNKNOWN #: 299
2,4-dinitrophenyl hydrazine Test: solution remains
colorless
Fehling’s Test: solution remains colorless
Lucas test: observed solution in 5-min intervals for 20
min., the solution remains
colorless
Tollen’s test: solution remains colorless
Iodoform Test: solution remains colorless
Bordwell-Wellman Test: solution became quite...
here what I have where what I need help with B., C., and D. Solubility, lodoform,...
here what I have
where what I need help with
B., C., and D. Solubility, lodoform, and Oxidation of Aldehydes and Ketones B3 Solubility Soluble in water? C. Todoform Test Methyl ketone present? D. Benedict's Test Oxidation occurred? Propionaldehyde Benzaldehyde Acetone Cyclohexanone Unknown Solubility iodoform test benedict test Propionaldehyde 1. Insoluble no y es Benzaldehyde 2. Insoluble no no yes Acetone Soluble yes Cyclohexane insoluble no ? Unknown insoluble no E. Identification of an Unknown Substance Unknown Summary of Testing...
The question is based on the identification of an unknown compound to be an alcohol, aldehyde...
The question is based on the identification of an unknown compound to be an alcohol, aldehyde or keytone. Give three reasons why acetone may interfere with your result. I think that the presence of acetone will give false positives for Iodoform reaction, DNP test while the unknows might not be (methyl ketones or aldehydes or ketones) for that matter, what could a third reason be?
Please answer question 5 Unknown is acetone, as you can see in the chart above the...
Please answer question 5
Unknown is acetone, as you can see in the chart above the
question
Aldehydes and Ketones Report Sheet E. Identification of an Unknown Substance Summary of Testing Results Conclusion smelis like Odor acetone nait polish soluble methyl Ketone Is it a methyl ket Does it have a familiar odor? moveY Solubility in water How many carbon atoms? 2 one? Iodoform test Oresen Hes Is it an aldehyde? no, Ketone Benedicte test- Tollen's tions and Problems Q.5...
Hello, we were provided two unknown samples and asked to determine if our samples were alcohols...
Hello, we were provided two unknown samples and asked to
determine if our samples were alcohols or not, using the
2,4-di-nitrophenyl hydrazine test. Then we tested our positive
sample with Fehlings test to determine that we had a Ketone and
other sample using Lucas Reagent to determine that we had a
secondary alcohol. We were given these graphs for our unknown
samples to determine the connectivity/molecular struture. Please
kindly assist or let me know what other information would help with...
Please help me figure out what A,B, and C are! The bolded is what is provided...
Please help me figure out what A,B, and C are! The bolded is
what is provided by the prompt and my notes are the unbolded. IR
for Compound B and D shown.
Compound A, C7H14O2 did
not discharge precipitate in dilute permanganate solution or give a
precipitate with 2,4, DNP or with ceric nitrate.
2,4 DNP tests for aldehydes and ketones
Ceric nitrate tests for alcohols
Potassium Permanganate tests for double bonds
So compound A has 1 degree of unsaturation...
13. What can you say about an unknown compound that gave a pouldve test with 2...
13. What can you say about an unknown compound that gave a pouldve test with 2 hydrazine and a positive test with the Jones Reseat? now compound that gave a pouldve test with 2,4-dinitrophenyl 14 What can you say about sa unknown compound when dissolved in distilled water and tested with peper, pave an estimated pH of about 81. 15. What can you say about an unknown compound that turned a wet plece al blue litmus red? 16. What can...
EXPERIMENT 4 Organic Families - Reactions and Identification of Functional Groups PART A. Reactions of Alkanes and Alkenes 1. Action of Bromine Water Observation Organic Compound cyclohexene c...
EXPERIMENT 4 Organic Families - Reactions and Identification of Functional Groups PART A. Reactions of Alkanes and Alkenes 1. Action of Bromine Water Observation Organic Compound cyclohexene cyclohexane Equations: Write an equation for the above compounds which caused a decolourisation of bromine water. Name and draw all reactants and products. Distinguishing Test for Primary, Secondary and Tertiary Alcohols PART B. 1. Lucas Test for Alcohols Organic Compound tert-pentanol (2-methyl 2-butanol) 2-pentanol Observation 1-pentanol Equations: Write an equation for the above...
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...
3. Tollen's Test Result + or- Functional Group Compound Observations/Conclusions acetone propanal unknown 4. Lucas Test Functional Group Alcohol Result Compound Observations Conclusions 1-butanol 2-butanol 2-methyl-2-propanol unknown 5. Iodoform Test Result +or-) Active Methyl? Compound Observations/Conclusions 2-pentanone 3-pentanone 1-butanol 2-butanol unknown
FUNCTIONAL GROUPS IDENTIFICATION LAB
Professor Burton decided to select two unknowns from Group 1
(299 & 399) and two unknowns from Group 2 (499 & 699).
Below are the descriptions of his observations/results for each
unknown.
UNKNOWN #: 299
2,4-dinitrophenyl hydrazine Test: solution remains
colorless
Fehling’s Test: solution remains colorless
Lucas test: observed solution in 5-min intervals for 20
min., the solution remains
colorless
Tollen’s test: solution remains colorless
Iodoform Test: solution remains colorless
Bordwell-Wellman Test: solution became quite...
here what I have
where what I need help with
B., C., and D. Solubility, lodoform, and Oxidation of Aldehydes and Ketones B3 Solubility Soluble in water? C. Todoform Test Methyl ketone present? D. Benedict's Test Oxidation occurred? Propionaldehyde Benzaldehyde Acetone Cyclohexanone Unknown Solubility iodoform test benedict test Propionaldehyde 1. Insoluble no y es Benzaldehyde 2. Insoluble no no yes Acetone Soluble yes Cyclohexane insoluble no ? Unknown insoluble no E. Identification of an Unknown Substance Unknown Summary of Testing...
Please answer question 5
Unknown is acetone, as you can see in the chart above the
question
Aldehydes and Ketones Report Sheet E. Identification of an Unknown Substance Summary of Testing Results Conclusion smelis like Odor acetone nait polish soluble methyl Ketone Is it a methyl ket Does it have a familiar odor? moveY Solubility in water How many carbon atoms? 2 one? Iodoform test Oresen Hes Is it an aldehyde? no, Ketone Benedicte test- Tollen's tions and Problems Q.5...
Hello, we were provided two unknown samples and asked to
determine if our samples were alcohols or not, using the
2,4-di-nitrophenyl hydrazine test. Then we tested our positive
sample with Fehlings test to determine that we had a Ketone and
other sample using Lucas Reagent to determine that we had a
secondary alcohol. We were given these graphs for our unknown
samples to determine the connectivity/molecular struture. Please
kindly assist or let me know what other information would help with...
Please help me figure out what A,B, and C are! The bolded is
what is provided by the prompt and my notes are the unbolded. IR
for Compound B and D shown.
Compound A, C7H14O2 did
not discharge precipitate in dilute permanganate solution or give a
precipitate with 2,4, DNP or with ceric nitrate.
2,4 DNP tests for aldehydes and ketones
Ceric nitrate tests for alcohols
Potassium Permanganate tests for double bonds
So compound A has 1 degree of unsaturation...
13. What can you say about an unknown compound that gave a pouldve test with 2 hydrazine and a positive test with the Jones Reseat? now compound that gave a pouldve test with 2,4-dinitrophenyl 14 What can you say about sa unknown compound when dissolved in distilled water and tested with peper, pave an estimated pH of about 81. 15. What can you say about an unknown compound that turned a wet plece al blue litmus red? 16. What can...
EXPERIMENT 4 Organic Families - Reactions and Identification of Functional Groups PART A. Reactions of Alkanes and Alkenes 1. Action of Bromine Water Observation Organic Compound cyclohexene cyclohexane Equations: Write an equation for the above compounds which caused a decolourisation of bromine water. Name and draw all reactants and products. Distinguishing Test for Primary, Secondary and Tertiary Alcohols PART B. 1. Lucas Test for Alcohols Organic Compound tert-pentanol (2-methyl 2-butanol) 2-pentanol Observation 1-pentanol Equations: Write an equation for the above...
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