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Chem > Flame Test > Flashcards

Flame Test Flashcards

1
Q

Flame test method

A

Use a clean nichrome wire to mix a sample of a solid compound with a few drops of conc. HCl

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2
Q

Sodium

A

Yellow

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3
Q

Potassium

A

Lilac

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4
Q

Calcium

A

Orange

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5
Q

Barium

A

Green

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6
Q

Lithium

A

Red

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7
Q

Strontium

A

Crimson red

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8
Q

Rubidium

A

Red violet

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9
Q

Chromium in addition of sodium hydroxide

A

Green precipitate
Cr(H20)3(OH)3

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10
Q

Chromium in addition of sodium hydroxide in excess

A

Precipitate dissolves
Green precipitate
Cr(H20)2(OH)4

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11
Q

Chromium in addition of aqueous ammonia

A

Green ppt

Cr(H20)3(OH)3

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12
Q

.

A
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13
Q

Manganese addition of sodium hydroxide

A

White ppt Mn(OH)2 but turns brown on standing in air

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14
Q

Manganese addition of sodium hydroxide in excess

A

Precipitate insoluble

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15
Q

Manganese addition of a aquotes ammonia

A

White ppt but turns brown upon standing in air

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16
Q

Manganese addition of aqueous ammonia in excess

A

Ppt is insoluble

17
Q

Fe2+ in addition to sodium hydroxide

A

Green ppt that turns brown upon standing in air

18
Q

Fe2+ in addition of sodium hydroxide in excess

A

Precipitate is insoluble in excess

19
Q

Fe2+ in addition of aqueous ammonia

A

Pale Green ppt that turns brown upon standing

20
Q

Fe2+ in addition of aqueous ammonia in excess

A

Ppt is insoluble in excess

21
Q

Fe3+ in sodium hydroxide and in excess

A

Red-brown ppt and insoluble in excess

22
Q

Fe3+ in aqueous ammonia and in excess

A

Red brown ppt and insoluble in excess

23
Q

Nickel in sodium hydroxide in excess

A

Green ppt And insoluble in excess

Chem (2 decks)

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