Further analysis and quantitive chemistry Flashcards

1
Q

Flame tests can help identify…

A

…positive ions.

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2
Q

Lithium flame colour?

A

Crimson.

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3
Q

Sodium flame colour?

A

Yellow.

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4
Q

Potassium flame colour?

A

Lilac.

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5
Q

Calcium flame colour?

A

Red.

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6
Q

Barium flame colour?

A

Green.

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7
Q

What ions form a white precipitate in sodium hydroxide solution?

A

Aluminium, calcium and magnesium.

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8
Q

How can we distinguish aluminium, calcium and magnesiums ions?

A

The precipitate formed between aluminium and sodium hydroxide dissolves in excess sodium hydroxide solution. Calcium ions burn red in a flame.

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9
Q

Copper (II) forms what colour precipitate with sodium hydroxide solution?

A

Blue.

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10
Q

Iron (II) forms what colour precipitate with sodium hydroxide solution?

A

Green.

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11
Q

Iron (III) forms what colour precipitate with sodium hydroxide solution?

A

Brown.

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12
Q

Carbonates react with what to form carbon dioxide?

A

Dilute acids.

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13
Q

Halide ions produce precipitates with what?

A

Silver nitrate in the presence of nitric acid.

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14
Q

Silver chloride is what colour?

A

White.

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15
Q

Silver bromide is what colour?

A

Cream.

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16
Q

Silver iodide is what colour?

A

Yellow.

17
Q

Sulphate ions produce what when they react with barium chloride in the presence of hydrochloric acid?

A

A white precipitate.