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Tests for ions and functional groups > Tests for ions > Flashcards

Tests for ions Flashcards

1
Q

Flame test colour for Li+

A

Bright red

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2
Q

Flame test colour for Na+

A

Yellow

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3
Q

Flame test colour for K+

A

Lilac

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4
Q

Flame test colour for Ca2+

A

Brick red

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5
Q

Flame test colour for Ba2+

A

Apple green

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6
Q

Flame test colour for Cu2+

A

Blue green

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7
Q

Test for Cu2+ ions

A

Add NaOH

Blue solution –> Blue ppt.
ppt. doesn’t dissolve in excess NaOH

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8
Q

Test for Fe2+ ions

A

Add NaOH

Green solution –> Green ppt.
ppt. doesn’t dissolve in excess NaOH

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9
Q

Test for Fe3+ ions

A

Add NaOH

Orange/brown solution –> Orange/brown ppt.
ppt. doesn’t dissolve in excess NaOH

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10
Q

Test for Zn2+ ions

A

Add NaOH

Colourless solution –> white ppt.
ppt. dissolves in excess NaOH

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11
Q

Test for Al3+ ions

A

Add NaOH

Colourless solution –> white ppt.
ppt. dissolves in excess NaOH

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12
Q

Test for Cl- ions

A

Add silver nitrate

Forms white ppt. (dissolves in ammonia solution)

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13
Q

Test for Br- ions

A

Add silver nitrate

Forms cream/off white ppt.
only dissolves in concentrated ammonia solution

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14
Q

Test for I- ions

A

Add silver nitrate

Forms yellow ppt.
Doesn’t dissolve in ammonia solution

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15
Q

Test for Pb2+ ions

A

Add KI

Forms bright yellow ppt.
ppt. dissolves in hot water

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16
Q

Test for SO4 2- ions

A

Add Barium (II) Chloride

Forms white ppt.
ppt. doesn’t dissolve in dilute HCl

17
Q

Test for CO3 2- ions

A

Add dilute acid, collect gas evolved and bubble through limewater.

Limewater clouds due to carbon dioxide production.

18
Q

Test for NO3- ions

A

Add NaOH and Devarda’s alloy

Ammonia produced (indicator paper goes blue)

19
Q

Test for NH4+ ions

A

Add NaOH, heat

Ammonia produced (indicator paper goes blue)

Tests for ions and functional groups (2 decks)

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