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Module 1 > Color Reactions > Flashcards

Color Reactions Flashcards

1
Q

Acetate with Ethanol and sulfuric acid

A

Fruity odor of ethyl acetate

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2
Q

Acetate with ferric chloride

A

brownish red ppt of basic acetates

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3
Q

Aluminum with ammonia

A

Aluminum hydroxide white ppt

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4
Q

Aluminum with aluminon reagent

A

Red lake

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5
Q

Ammonium thiocyanate with ferric salts

A

Blood red complex of Ferric thiocyanate

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6
Q

Ammonium thiocyanate with acidic cobalt solution

A

Beautiful blue Cobalt thiocyanate

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7
Q

Arsenates with silver nitrate

A

Chocolate brown ppt

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8
Q

Arsenites with silver nitrate

A

Yellow ppt

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9
Q

Arsenates with ammonium molybdate

A

Yellow ppt

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10
Q

Magnesia Mixture with Arsenites

A

No Reaction; Differentiating test for arsenates and arsenites

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11
Q

Borates with sulfuric acid and methanol

A

green bordered flame

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12
Q

Borates with turmeric paper; addition of NaOH results to

A

Orange; Olive green (NaOH)

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13
Q

Bromine with carbon tetrachloride

A

orange color

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14
Q

Carbonate with acidic aqueous solutions

A

effervescence

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15
Q

Carbonate with phenolphthalein

A

red color; differentiating test with bicarbonate (colorless)

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16
Q

Chloride with silver nitrate

A

white curdy ppt soluble in ammonia, insoluble in nitric acid

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17
Q

Citrate with calcium chloride/hydroxide

A

No ppt or white ppt and dissolves on cooling

18
Q

Composition of Denige’s Reagent

A

pyridine and acetic anhydride (3:1)

19
Q

Denige’s Reagent with Citrate

A

Carmine Red

20
Q

Denige’s Reagent with Tartrate

A

Emerald green

21
Q

Chromium with NaOH

A

Grayish Green slug –> dissolves in excess reagent

22
Q

Cobalt with NaOH

A

Blue Cobalt Hydroxide –> Turning Olive Green –> Turning Rose Red

23
Q

Cobalt with potassium nitrite and acetic acid

A

Yellow ppt of cobaltinitrite

24
Q

Cobalt with alpha-nitroso-beta-napthol

25
Q

Nickel with alpha-nitroso-beta-napthol

A

Red Brown ppt

26
Q

Nickel with dimethylglyoxime

A

Bright red crystalline ppt insoluble in ammonia

27
Q

Copper with iron in HCl

A

Red deposits on iron

28
Q

Copper with Ferrocyanide

A

Red brown ppt which turns blue with ammonia (formation of cupric ammonium complex)

29
Q

Iodide with chlorine or potassium permanganate

A

violet color

30
Q

Iodide with sulfuric acid and HOT Oxalic acid or COLD Sodium Bisulfite

A

Decolorization

31
Q

Cyanate with cobalt acetate

A

Azure blue crystals

32
Q

Phosphate with silver nitrate

A

Yellow ppt

33
Q

Phosphate with ammonium molybdate

A

Canary Yellow ppt (Ammonium Phosphomolybdate)

34
Q

Salicylate with ferric chloride

A

violet color

35
Q

Salicylate with acid

A

white ppt of salicylic acid

36
Q

Silver with HCl

A

white curdy ppt of AgCl

37
Q

Thiosulfate with HCl

A

Thiosulfuric acid which readily decomposes to Sulfur (Yellow ppt)

38
Q

Thiosulfate with Ferric chloride

A

dark violet solution which disappears immediately

39
Q

Zinc with hydrogen sulfide

A

white ppt of zinc sulfide

40
Q

Saccharin in Fluorescein Test (resorcinol + sulfuric acid + excess NaOH)

A

Fluorescent green liquid

Module 1 (15 decks)

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