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A Level Chemistry > Y12 test tube tests > Flashcards

Y12 test tube tests Flashcards

1
Q

how do you est for alkene

A

Bromine water

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2
Q

how do you test for an alkene

A

Bromine water

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3
Q

what is observed when an alkene is added to Bromine water

A

the Bromine water changed from orange to colorless

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4
Q

what does sodium carbonate test for

A

acids

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5
Q

what is observed when sodium carbonate is added to an acid

A

effervescence (CO2 gas is released)

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6
Q

what is the observed when acidified potassium dichromate is added to a secondary alcohol

A

the dichromate is reduces changing from orange to green

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7
Q

what is observed when acidified potassium dichromate is added to an aldehyde

A

the dichromate is reduces changing from orange to green

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8
Q

what is observed when acidified potassium dichromate is added to a tertiary alcohol

A

no changes (tertiary alcohols can not be oxidised)

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9
Q

what is observed when acidified potassium dichromate is added to a ketone

A

no changes (ketone can not be oxidised by potassium dichromate)

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10
Q

what is observed when acidified potassium dichromate is added to a carboxylic acid

A

no changes (carboxylic acids can not be oxidised by potassium dichromate)

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11
Q

Tollens’s reagent is a test for which functional group

A

Aldehyde

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12
Q

what happens to an aldehyde when it is tested using Tollen’s reagent

A

the aldehyde is oxidised to a carboxylic acid

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13
Q

what is observed when Tollen’s reagent is added to a ketone

A

No visible change

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14
Q

what reagent is used to test for ammonium ions

A

heat with NaOH

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15
Q

what is observed when ammonium (NH4+) ions are heated with NaOH

A

has released turns damp red litmus paper blue

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16
Q

what is Fehlings solution a test for

17
Q

what is the test for sulfate ions (SO4 2-)

A

Acidified Barium Chloride

18
Q

what is observed when sulfuric acid is added to BaCl

A

white precipitate (BaSO4)

19
Q

wat is the ionic equation for the reaction of Na2SO4 with BaCl2

A

Ba2+ (aq) + SO4 2- (aq) –> BaSO4(s)

20
Q

how do you test for magnesium ions

A

add NaOH this forms Mg(OH)2 which s a white precipitate

21
Q

how do you test for hydroxide ions

A

Add Mg(NO3)2 this forms Mg(Oh)2 which is a white precipitate

22
Q

what would you expect to see when sodium carbonate is added to HCl

A

effervescence

23
Q

what would tou expect to see when barium carbonate (BaCO3) is added to sulfuric acid (H2SO4)

A

Effervescence and white precipitate

A Level Chemistry (12 decks)

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