Detailed Notes - Topic 3.3. Halogenoalkanes - AQA Chemistry A-level
Nucleophilic substitution reactions can only occur for ?1?o? (primary) and 2?o? (secondary?) halogenoalkanes. 3.3.3.2 - Elimination. When a halogenoalkane is
Core practical 4: Investigate the hydrolysis of halogenoalkanes
Classify each halogenoalkane as primary secondary or tertiary. Page 5. EDEXCEL. Chemistry. Teacher Resource Pack 1.
Detailed Notes - Edexcel IAL Chemistry A-level
%20Alcohols%20and%20Spectra.pdf
Notes - Topic 2.6 Halogenoalkanes - WJEC (Wales) Chemistry A-level
WJEC Chemistry A-level. 2.6: Halogenoalkanes Halogenoalkanes contain ?polar bonds?as the halogens are much ?more??electronegative?than carbon atoms.
Notes - 16 Halogen Derivatives - CIE Chemistry A Level
Halogenoalkanes. Halogenoalkanes are alkanes which contain a ?halogen atom?covalently bonded to a carbon atom. When naming halogenoalkanes the ?prefix of
Flashcards - Edexcel IAL Chemistry A-Level
%20Alcohols%20and%20Spectra%20-%20Edexcel%20IAL%20Chemistry%20A-level.pdf
chemrevise
If the solvent is changed to ethanol an elimination reaction occurs. Alternative mechanism for tertiary halogenoalkanes. Tertiary halogenoalkanes undergo
Practical notes - Edexcel Chemistry International A Level
Edexcel International Chemistry. A-level. Practical 5. Investigating the Rates of Hydrolysis of. Halogenoalkanes www.pmt.education
Copy of Practical Flashcards - Edexcel Chemistry International A Level
Why can halogenoalkanes undergo nucleophilic substitution reactions? Because the carbon-halogen bond is polar (there is a large difference between the
Flashcards - Topic 3.3 Halogenoalkanes - AQA Chemistry A-level (3)
AQA Chemistry A-level. Topic 3.3 - Haloalkanes. Flashcards Are halogenoalkanes soluble in water? ... Do halogenoalkanes have a polar bond? why?
[PDF] Detailed Notes - Topic 33 Halogenoalkanes - AQA Chemistry A-level
This is the reaction mechanism that shows how nucleophiles attack halogenoalkanes It can be used to produce alcohols or aminesfrom halogenoalkanes Mechanism
[PDF] Organic Chemistry: Halogenoalkanes Alcohols and Spectra
%2520Alcohols%2520and%2520Spectra.pdf
[PDF] 33 Halogenoalkanes chemrevise
Halogenoalkanes can be classified as primary secondary or tertiary depending on the number of carbon atoms attached to the C-X functional group
A-LEVEL AQA ChEMISTRY NOTES Halogenoalkanes
Concise and high quality AQA A-level Chemistry covering Halogenoalkanes A-LEVEL AQA ChEMISTRY NOTES Halogenoalkanes Picture DOWNLOAD PDF
[PDF] Alkanes and Halogenoalkanes Science Skool!
Alkanes and Halogenoalkanes Chlorine is a useful industrial chemical Haloalkanes also undergo elimination reactions to produce alkenes
[PDF] Alkanes and Halogenoalkanes Answers Science Skool!
haloalkanes / alcohols Mark Scheme – General Certificate of Education (A-level) Chemistry – Unit 1: Foundation Chemistry – June 2011
28 Haloalkanes - A-Level Chemistry
2 8 Assessed Homework Task (mark scheme) 2 8 Test (mark scheme) More Exam Questions on 2 8 Haloalkanes (mark scheme)
[PDF] 26 Halogenoalkanes - WJEC
A substitution reaction occurs when a nucleophile replaces the halogen atom in a halogenoalkane The reaction of a halogenoalkane with an aqueous base such as
[PDF] Detailed Notes - Topic 33 Halogenoalkanes - AQA Chemistry A-level
This is the reaction mechanism that shows how nucleophiles attack halogenoalkanes It can be used to produce alcohols or aminesfrom halogenoalkanes Mechanism
[PDF] Organic Chemistry: Halogenoalkanes Alcohols and Spectra
%2520Alcohols%2520and%2520Spectra.pdf
[PDF] 33 Halogenoalkanes chemrevise
Halogenoalkanes can be classified as primary secondary or tertiary depending on the number of carbon atoms attached to the C-X functional group
A-LEVEL AQA ChEMISTRY NOTES Halogenoalkanes
Concise and high quality AQA A-level Chemistry covering Halogenoalkanes A-LEVEL AQA ChEMISTRY NOTES Halogenoalkanes Picture DOWNLOAD PDF
[PDF] Alkanes and Halogenoalkanes Science Skool!
Alkanes and Halogenoalkanes Chlorine is a useful industrial chemical Haloalkanes also undergo elimination reactions to produce alkenes
[PDF] Alkanes and Halogenoalkanes Answers Science Skool!
haloalkanes / alcohols Mark Scheme – General Certificate of Education (A-level) Chemistry – Unit 1: Foundation Chemistry – June 2011
28 Haloalkanes - A-Level Chemistry
2 8 Assessed Homework Task (mark scheme) 2 8 Test (mark scheme) More Exam Questions on 2 8 Haloalkanes (mark scheme)
[PDF] 26 Halogenoalkanes - WJEC
A substitution reaction occurs when a nucleophile replaces the halogen atom in a halogenoalkane The reaction of a halogenoalkane with an aqueous base such as
What are halogenoalkanes in a level chemistry?
?What are Halogenoalkanes in A-Level Chemistry? Halogenoalkanes, also known as haloalkanes, are organic compounds that contain one or more halogen atoms (chlorine, bromine, fluorine, or iodine) attached to a carbon atom in an alkane molecule.What is 3.3 3.1 nucleophilic substitution?
3.3.3.1 - Nucleophilic Substitution
Halogenoalkanes contain ?polar bonds?as the halogens are more electronegative than carbon atoms. This means electron density is drawn towards the halogen forming ??+ and ?- regions?.How do you prepare halogenoalkanes?
Preparation of Halogenoalkanes
Halogenoalkanes are generally made by reacting the appropriate alcohol it with a halogenating reagents. Halogenating agents include phosphorus pentachloride, sodium chloride with concentrated sulphuric acid, sodium bromide with concentrated phosphoric acid and phosphorus with iodine.- There are three different kinds of halogenoalkanes: Primary, secondary and tertiary.
EDEXCEL Chemistry Teacher Resource Pack 1
© Pearson Education Ltd 201
6 This document may have been altered from the original 1Core practical 4
Teacher sheet
Investigate the hydrolysis of halogenoalkanes
Practical activities have been safety checked but not trialled by CLEAPSS. Users may need to adapt the risk assessment information to
local circumstances. Core practical 4: Investigate the hydrolysis of halogenoalkanesObjective
halo geno alkanes and of chloro -, bromo-, and iodoalkanes Safety Specification linksObtain hot water from a kettle rather than using
Part 1
1. ௗ
to the three quarters mark with water, at2. ௗ3
of ethanol.Now add four drops of 1
-iodobutane to the first tube, four drops of 1 -bromobutane to the second tube and four drops of1-chlorobutane to the third tube. Label the
tubes.3. Loosely place a bung in each test tube and
place the test tubes in the water bath.4. Pour 5ௗcm3
of silver nitrate solution into three clean test tubes.Now place the test tubes in
the water bath.5. When the halogenoalkane-ethanol solutions
have reached the temperature of the water bath , add the silver nitrate solution to one of the halogenoalkane -ethanol solutions and replace the bung. Start the stop clock as you do so.6. Measure the time taken for the precipitate to
appear. As soon as the solution becomes cloudy stop the stop clock.7. Repeat steps 5 and 6 for the other two
halogenoalkanes.Part 2
8. Repeat Part 1 using 1-bromobutane, 2-
bromobutane and 2 -bromo-2-methylpropane be very slow. It is possible that a precipitate will not form in a reasonable time period. Instruct the students to stop timing after 10 minutes. silver nitrate solution should be kept in the water bath.EDEXCEL Chemistry Teacher Resource Pack 1
© Pearson Education Ltd 201
6 This document may have been altered from the original 2Core practical 4
Teacher sheet
Investigate the hydrolysis of halogenoalkanes
Practical activities have been safety checked but not trialled by CLEAPSS. Users may need to adapt the risk assessment information to local circumstances.Answers to questions
1. CH 3 CH 2 CH 2 CH 2Br + H
2 O CH 3 CH 2 CH 2 CH 2OH + H
+ Br2. silver iodide
3. The halogenoalkanes are insoluble in water. Using ethanol ensures that the halogenoalkane
dissolve s so it can react with the water molecules.4. Water has lone pair(s) of electrons on the oxygen atom.
5. If hydroxide ions were used, a precipitate of silver hydroxide would form instantly.
6. primary primary primary secondary tertiarySample data
Part 1
Halogenoalkane Time taken for a precipitate to form/s1-iodobutane 52
1-bromobutane 87
1-chlorobutane 606
Part 2
Halogenoalkane Time taken for a precipitate to form/s1-bromobutane 59
2-bromobutane 34
2-bromo-2-methylpropane 3
EDEXCEL Chemistry Teacher Resource Pack 1
© Pearson Education Ltd 201
6 This document may have been altered from the original 1Core practical 4
Student sheet
Investigate the hydrolysis of halogenoalkanes
Practical activities have been safety checked but not trialled by CLEAPSS. Users may need to adapt the risk assessment information to local circumstances. Core practical 4: Investigate the hydrolysis of halogenoalkanesObjective
halo geno alkanes and of chloro -, bromo-, and iodoalkanesSafety
All the maths you need
Equipment
3 beaker 3 ethanol 3 measuring cylinderProcedure
Part 1
1. ௗ
2. ௗ
3 of ethanol. Now add four drops of 1-iodobutane to the first tube, four drops of 1 -bromobutane to the second tube and four drops of1-chlorobutane to the third tube. Label the tubes.
3. Loosely place a bung in each test tube and place the test tubes in the water bath.
4. Pour 5ௗcm
3 of silver nitrate solution into three clean test tubes. Now place the test tubes in the water bath.5. When the halogenoalkane-ethanol solutions have reached the temperature of the
water bath , add the silver nitrate solution to one of the halogenoalkane-ethanol solutions and replace the bung. Start the stop clock as you do so.6. Measure the time taken for the precipitate to appear. As soon as the solution
becomes cloudy stop the stop clock.7. Repeat steps 5 and 6 for the other two halogenoalkanes.
Part 2
8. Repeat Part 1 using 1-bromobutane, 2-bromobutane and 2-bromo-2-methylpropane
instead of the other halogenoalkanes.Analysis
of results1. Record your results for Part 1 and Part 2 in a suitable way.
2. What is the pattern shown in Part 1?
3. What is the pattern shown in Part 2?
EDEXCEL Chemistry Teacher Resource Pack 1
© Pearson Education Ltd 201
6 This document may have been altered from the original 2Core practical 4
Student sheet
Investigate the hydrolysis of halogenoalkanes
Practical activities have been safety checked but not trialled by CLEAPSS. Users may need to adapt the risk assessment information to local circumstances.Learning tip
s neutralised by HNO 3 before adding AgNO 3Questions
1. Write an equation for the reaction of 1-bromobutane with water.
2. In these reactions a precipitate forms. Identify the precipitate formed when the
halogenoalkane is 1 -iodobutane.3. Explain why ethanol is used in these reactions.
4. Explain why water is able to act as a nucleophile.
5. Explain why water is used as the nucleophile rather than hydroxide ions?
6. Draw skeletal formulae for each of the halogenoalkanes used in this investigation
EDEXCEL Chemistry Teacher Resource Pack 1
© Pearson Education Ltd 2016
This document may have been altered from the original 1Core practical 4 Technician sheet
Investigate the hydrolysis of halogenoalkanes
Practical activities have been safety checked but not trialled by CLEAPSS. Users may need to adapt the risk assessment information to local circumstances. Core practical 4: Investigate the hydrolysis of halogenoalkanesObjective
halogenoalkanes and of chloro -, bromo-, and iodoalkanesSafety
Equipment per student/group Notes on equipment
250ௗcm 3 beaker
12 test tubes
1-chlorobutane
Students need access to the organic reagents
but need not have access to individual bottles.1-bromobutane
1-iodobutane
2-bromobutane
2-bromo-2-methylpropane
silver nitrate solution Of same concentration as used for halide identification tests dropping pipettes 15 cm 3 ethanol two 10ௗcm 3 measuring cylinders stop clock labels for test tubes kettle Notesquotesdbs_dbs17.pdfusesText_23[PDF] halt tm
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