Fichas
Testing for functional Groups
Fichas del conjunto (22)
- 1Give a test for alkenes and its observationsReaction with bromine water going from orange to colourless
- 2Give the test for halogenoalkanesNucleophilic substitution with KOH to displace halide ion then react with silver nitrate forming AgX precipertate
- 3Give the test for any alcoholReact with PCL5
- 4Whats produced in this reactionHCL gas
- 5How do you test for HCL Gas?Hold damp litmus paper over which will bleach to red
- 6What else reacts in this way?water and COOH
- 7How do you prepare the reaction to ensure water and acid isn't present?Dehydrate the sample and check the PH is 7
- 8test for primary alcohol?Acidified potassium dichromate (distill) goes green to orange
Perform aldehyde test to confirm primary alcohol - 9Test for secondary alcohols?Oxidise with K2Cr2O7 and distill and test for carbonyl with brandies (should not be positive with aldehyde test)
- 10Test for tertiary alcohols?Shouldn't react with K2Cr2O7
- 11What does the iodoform test test for?Molecule with R - CH (CH3)(OH) group
- 12What is the Iodoform molecule?CHI3
- 13What colour change occurs during the iodoform test?Produces pale yellow solution of Iodoform
- 14What does 2,4 DNPH test for?Carbonyl compounds (C=O)
Both keynotes and carboxylic acids - 15What colour change is produced in the Bradies reaction?Yellow/ Orange precipertate
- 16Name 4 tests used to identify aldehydes-Oxidising with dichromate goes green from orange
- Fehlings
-Benedicts reagent
-Tollens Reagent - 17Whats the formula for Tollens?Ag(NH3)2 +
- 18What conditions are needed for complete oxidation with dichromate?Heat under Reflux with a few drops of Dil Sulfuric acid
- 19Give some tests for carboxylic acids (There are 4 total)-Reacting with PCL5
-Reacting with alcohol in esterification
-Reacting with carbonates to produce CO2
-Reaction with water to produce acidic solution - 20Whats produced in the test for COOH with PCL5HCL gas
- 21How do you test for the presence of HCL gas?Bleaches damp litmus Red
- 22How can reaction with alcohols of COOH confirm presence of COOH?Ester formed produces pear drop/ glue smell
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- A-level Chemistry Fichas sobre Testing for functional Groups, creado por Jack Rowe el 13/04/2021.
- Creado por
- Jack Rowe
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