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Chemistry Grade 10 > Analytical Chemistry > Flashcards

Analytical Chemistry Flashcards

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1
Q

Colour : Cu 2+

A

Blue / Green

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2
Q

Colour : Cr 3+

A

Green

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3
Q

Colour : Mn 2+

A

Pink

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4
Q

Colour : Fe 2+

A

Green

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5
Q

Colour : Fe 3+

A

Yellow/Brown

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6
Q

Colour : Co 2+

A

Blue [Pink]

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7
Q

Colour : Ni 2+

A

Green

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8
Q

Colour : MnO4 1-

A

Pink [Purple]

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9
Q

Colour : Cr2O7 2-

A

Orange

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10
Q

Calcium Nitrate + Sodium Hydroxide =>

A

Ca(NO3)2 + 2NaOH => 2NaNO3 + Ca(OH)2

Calcium Hydroxide - Insoluble White Precipitate

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11
Q

Calcium Nitrate + Ammonium Hydroxide =>

A

Concentration of OH -1 is low and cannot form precipitate.

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12
Q

Magnesium Chloride + Sodium Hydroxide =>

A

MgCl2 + 2NaOH => 2NaCl + Mg(OH)2

Magnesium Hydroxide - Insoluble Dull White Precipitate

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13
Q

Magnesium Chloride + Ammonium Hydroxide =>

A

MgCl2 + 2NH4OH => 2NHCl + Mg(OH)2

Magnesium Hydroxide - Insoluble Dull White Precipitate

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14
Q

Ferrous Sulphate + Sodium Hydroxide =>

A

FeSO4 + 2NaOH => Na2SO4 + Fe(OH)2

Ferrous Hydroxide - Insoluble Dirty Green Precipitate

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15
Q

Ferrous Sulphate + Ammonium Hydroxide =>

A

FeSO4 + 2NH4OH => (NH4)2SO4 + Fe(OH)2

Ferrous Hydroxide - Insoluble Dirty Green Precipitate

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16
Q

Ferric Chloride + Sodium Hydroxide =>

A

FeCl3 + 3NaOH => 3NaCl + Fe(OH)3

Ferric Hydroxide - Insoluble Reddish Brown Precipitate

17
Q

Ferric Chloride + Ammonium Hydroxide =>

A

FeCl3 + 3NH4OH => 3NH4Cl + Fe(OH)3

Ferric Hydroxide - Insoluble Reddish Brown Precipitate

18
Q

Cupric Sulphate + Sodium Hydroxide =>

A

CuSO4 + 2NaOH => Na2SO4 + Cu(OH)2

Cupric Hydroxide - Insoluble Pale Blue Precipitate

19
Q

Cupric Sulphate + Ammonium Hydroxide =>

A

CuSO4 + 2NH4OH => (NH42)SO4 + Cu(OH)2

Cupric Hydroxide - Soluble Pale Blue Precipitate

20
Q

Cupric Hydroxide + Ammonium Sulphate + Ammonium Hydroxide[excess] =>

A

CuSO4 + (NH4)2SO4 + 2NH4OH[excess] => 4H2O + [Cu(NH3)4]SO4

Tetrammine Copper Sulphate - Inky Blue Solution

21
Q

Cupric Hydroxide + Ammonium Hydroxide[excess] =>

A

Cu(OH)2 + 4NH4OH[excess] => 4H2O + Cu(NH3)42

Tetrammine Copper Hydroxide - Deep Blue Solution

22
Q

Zinc Sulphate + Sodium Hydroxide =>

A

ZnSO4 + 2NaOH => Na2SO4 + Zn(OH)2

Zinc Hydroxide - Soluble Gelatinous White Precipitate

23
Q

Zinc Hydroxide + Sodium Hydroxide[excess] =>

A

Zn(OH)2 + 2NaOH[excess]=> 2H2O + Na2ZnO2

Sodium Zincate - Colorless Solution

24
Q

Zinc Hydroxide + Ammonium Sulphate + Ammonium Hydroxide[excess] =>

A

ZnSO4 + (NH4)2SO4 + 2NH4OH[excess] => 4H2O + [Zn(NH3)4]SO4

Tetrammine Zinc Sulphate - Colorless Solution

25
Q

Zinc Hydroxide + Ammonium Hydroxide[excess] =>

A

Zn(OH)2 + 4NH4OH[excess] => 4H2O + Zn(NH3)42

Tetrammine Zinc Hydroxide - Colorless Solution

26
Q

Plumbous Nitrate + Sodium Hydroxide =>

A

Pb(NO3)2 + 2NaOH => 2NaNO3 + Pb(OH)2

Plumbous Hydroxide - Soluble Chalky White Precipitate

27
Q

Plumbous Hydroxide + Sodium Hydroxide[excess] =>

A

Pb(OH)2 + 2NaOH[excess] => 2H2O + Na2PbO2

Sodium Plumbite - Colorless Solution

28
Q

Plumbous Nitrate + Ammonium Hydroxide =>

A

Pb(NO3)2 + 2NH4OH => 2NH4NO3 + Pb(OH)2

Plumbous Hydroxide - Insoluble Chalky White Precipitate

29
Q

Zn, Pb + 2KOH , 2NaOH [hot & conc.]

A

Sodium/Potassium Zincate/Plumbite + H2

30
Q

2Al + 2H2O + 2NaOH/2KOH [hot & conc.]

A

2NaAlO2 / 2KAlO2 + 3H2

31
Q

Amphoteric Oxide/Hydroxide + Alkali [hot & conc.]

A

Respective Metal Zincate/ Plumbite/Aluminate + Water

Chemistry Grade 10 (13 decks)

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