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Chemistry > Test for cations and anions > Flashcards

Test for cations and anions Flashcards

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1
Q

Cation

A

An ion with a positive charge

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2
Q

Anion

A

An ion with a negative charge

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3
Q

Carbonate (CO3 2-)

A

Add dilute acid

Effervescence, CO2 emitted

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4
Q

Chloride (Cl-) (halogen)

A

Acidify with dilute nitric acid
And add aqueous silver nitrate

White ppt

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5
Q

Bromide (Br-) (halogen)

A

Acidify with dilute nitric acid
And add aqueous silver nitrate

Cream ppt

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6
Q

Iodide (I-)

A

Acidify with dilute nitric acid
And add aqueous silver nitrate

Yellow ppt

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7
Q

Nitrate (NO3 -)

A

Add sodium hydroxide, then Aluminium foil, warm carefully

Ammonia produced

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8
Q

Sulfate (SO4 2-)

A

Add barium nitrate

Sulfur dioxide produced turns
Potassium manganate from purple to colorless

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9
Q

Aluminium (Al 3+) (sodium hysdroxide)

A

White ppt, soluble in excess

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10
Q

Ammonium (NH4 +) (sodium hysdroxide)

A

Ammonia produced on warming

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11
Q

Calcium (Ca 2+) (sodium hysdroxide)

A

White ppt, insoluble in excess

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12
Q

Chromium (III) (Cr 3+) (sodium hysdroxide)

A

Green ppt, insoluble in excess

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13
Q

Copper (II) (Cu 2+) (sodium hysdroxide)

A

Light Blut ppt, insoluble in excess

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14
Q

Iron (II) (Fe 2+) (sodium hysdroxide)

A

Green ppt, insoluble in excess

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15
Q

iron (III) (Fe 3+) (sodium hysdroxide)

A

red - brown ppt, insoluble in excess

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16
Q

zinc (Zn 2+) (sodium hysdroxide)

A

white ppt, soluble in excess

17
Q

ammonia (NH3)

A

litmus paper from red to blue

18
Q

carbon dioxide (CO2)

A

turns limewater milky

19
Q

chlorine (Cl2)

A

bleaches litmus paper

20
Q

hydrogen (H2)

A

pops with lighted splint

21
Q

oxygen (O2)

A

relights a glowing splint

22
Q

sulfur dioxide (SO2)

A

turns potassium manganate from purple to colourless

23
Q

lithium flame

A

red flame

24
Q

sodium flame

A

yellow

25
Q

potassium flame

A

lilac

26
Q

Copper flame

A

blue - green

Chemistry (1 decks)

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