Test-Tube Reactions Flashcards by Zuzanna Filipiak

Q

Test for alkenes

A

Bromine water

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Q

Result for present alkene

A

Orange to colourless in bromine water

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Q

Test for haloalkanes

A

•NaOH +heat
•acidify with HNO3
•add AgNO3
•add dilute NH3
•add conc NH3

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Q

Result for Cl ions in AgNO3

A

White ppt

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Q

Result for Br ions in AgNO3

A

Cream ppt

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Q

Result for I ions in AgNO3

A

Yellow ppt

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Q

Result for Cl ions in dilute NH3

A

Colourless
Dissolve

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Q

Result for Br ions in dilute NH3

A

NVC

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Q

Result for Br ions in conc NH3

A

Colourless
Dissolve

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Q

Result for I ions in conc NH3

A

NVC

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Q

Test for primary or secondary alcohols

A

•acidified K2Cr2O7
•heat

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Q

Result for primary or secondary alcohols

A

Orange to green

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Q

Test for aldehyde

A

Fehlings sol
Tollens reagent

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Q

Result for aldehyde

A

Tollens- silver mirror
Fehlings- brick red ppt

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Q

Test for carboxylic acid

A

Add carbonate

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Q

Result for carboxylic acid

A

Effervescence

Q

Test for H2 gas

A

Lit splint

Q

Result for H2 gas

A

Squeaky pop

Q

Test for O2 gas

A

Apply glowing splint

Q

Result for O2 gas

A

Relit splint

Q

Test for sulphate ions

A

Add barium chloride
BaCl2

Q

Result for sulphate ions

A

White ppt forms

Q

Test for carbonate ions

A

Add ant acid

Q

Result for carbonate ions

A

Effervescence
CO2