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inorganic qa > Cations > Flashcards

Cations Flashcards

1
Q

Aluminium in NaOH

A

White ppt soluble in excess (Al(OH)4)-

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2
Q

Ammonium (NH4+) in NaOH

A

Ammonia produced upon heating (describe test)

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3
Q

Barium (Ba+) in NaOH

A

No ppt

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4
Q

Calcium (Ca2+) in NaOH

A

White ppt insoluble in excess

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5
Q

Chromium (Cr3+) in NaOH

A

Grey green ppt soluble in excess to give dark green solution

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6
Q

Copper (cu2+) in NaOH

A

Pale blue ppt insoluble in excess

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7
Q

Iron (II) (Fe2+) in NaOH

A

Green ppt Fe(OH)2 turns brown upon contact with air; insoluble in excess

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8
Q

Iron (III) (Fe3+) in NaOH

A

red brown ppt insoluble in excess

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9
Q

Magnesium (Mg2+) in NaOH

A

White ppt insoluble in excess

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10
Q

Manganese (Mn2+) in NaOH

A

Off white ppt that rapidly turns brown upon contact with air; insoluble in excess

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11
Q

Zinc (Zn2+) in NaOH

A

White ppt soluble in excess to give colourless solution of (Zn(OH)4)2-

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12
Q

Al3+ in aq NH3

A

White ppt insoluble in excess

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13
Q

BA 2+ in aq NH3

A

No ppt

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14
Q

Ca2+ in aq NH3

A

No Ppt

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15
Q

Cr3+ in aq NH3

A

Grey green ppt insoluble in excess

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16
Q

Iron (II) Fe2+ in aq NH3

A

Green ppt turns brown upon contact with air

Insoluble in excess

17
Q

Copper (Cu2+) in aq NH3

A

Pale blue ppt

Soluble in excess to give dark blue solution

18
Q

Iron (III) Fe3+ in aq NH3

A

Red brown ppt

Insoluble in excess

19
Q

Mg2+ in aq NH3

A

white ppt insoluble in excess

20
Q

Mn2+ in aq NH3

A

Off white ppt that rapidly turns brown on contact with air

Insoluble in excess

21
Q

Zn2+ in aq NH3

A

White ppt

Soluble in excess

inorganic qa (3 decks)

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