16 organic analysis

Question 1

how do you test for an alkene?

Answer 1

shake with bromine water

Question 2

what is the result of shaking an alkene with bromine water?

Answer 2

orange to colourless

Question 3

how do you test for a halogenalkane?

Answer 3

1. add NaOH (aq) and heat
2. acidify with HNO3
3. add AgNO4

Question 4

what is the result of the test for a halogenalkane?

Answer 4

precipitate of Ag(halogen)

Question 5

how do you test for an alcohol?

Answer 5

add acidified K2Cr2O7

Question 6

what happens when you add acidified K2Cr2O7 to an alcohol?

Answer 6

orange to green colour

Question 7

what types of alcohols don’t react with acidified K2Cr2O7?

Answer 7

tertiary

Question 8

what can also react with acidified K2Cr2O7 that isn’t an alcohol?

Answer 8

aldehyde

Question 9

how do you test for aldehydes?

Answer 9

warm with fehling’s solution or tollen’s reagent

Question 10

what happens when you warm fehling’s solution with an aldehyde?

Answer 10

blue colour to red precipitate

Question 11

how do you test for carboxylic acids?

Answer 11

add NaHCO3 (aq)

Question 11

what happens when you warm tollen’s reagent with an aldehyde?

Answer 11

silver mirror forms

Question 12

what happens when you add NaHCO3 with a carboxylic acid?

Answer 12

effervescence