Synthesis A2 Flashcards by Lucy Roberts-Clark

Q

Test for C=C bond

A

bromine water

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Q

positive result for bromine water

A

yellow/orange to colourless

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Q

negative result for bromine water

A

stays yellow/orange

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Q

test for primary and secondary alcohols

A

acidified potassium dichromate

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Q

positive result for potassium dichromate

A

orange to green

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Q

negative result for potassium dichromate

A

stays orange

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Q

what conditions are for an acidified potassium dichromate test

A

aqueous sulphuric acid + K2Cr3O7 + heat

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Q

what does a tollen’s reagent test for

A

aldehydes

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Q

positive result for tollen’s reagent

A

silver mirror

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Q

negative test for a tollen’s reagent

A

no change

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Q

conditions for a tollen’s reagent

A

NH3, NaOH, AgNO3, [Ag(NH3)2] and warm

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Q

what does a Fehling’s solution test for

A

aldehyde

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Q

positive test for a Fehling’s solution

A

blue solution to red/orange solid

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Q

negative test for a Fehling’s solution

A

stays blue

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Q

conditions for a Fehling’s solution

A

Cu2+ and warm

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Q

what does sodium hydrogen carbonate test for

A

carboxylic acid

Q

positive test for a carboxylic acid

A

bubbles of gas/fizzing

Q

negative test for a carboxylic acid

A

no reaction

Q

molecular formula of sodium hydrogen carbonate

A

NaHCO3

Q

test for a haloalkene

A

hydrolysis followed by acidified AgNO3

Q

conditions for test for haloalkane

A

warm with NaOH and add AgNO3

Q

positive results for test for chloroalkane

A

white solid

Q

positive results for test for bromoalkane

A

cream solid

Q

positive result for test for iodoalkane

A

yellow solid

negative result for test for haloalkane

no reaction

test for acyl chloride

hydrolysis

conditions for test for acyl chloride

add H2O

positive result for test for acyl chloride

white fumes

negative results for test for acyl chloride

no reaction