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Chemistry Module 3 > Qualitative analysis > Flashcards

Qualitative analysis Flashcards

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1
Q

What test do you do first?

A

Carbonate

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2
Q

What is the positive result for the carbonate test?

A

Effervescence (CO2 released)

If unsure would turn limewater cloudy

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3
Q

What test do you do second?

A

Sulfate

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4
Q

What is the positive result for the sulfate test?

A

White precipitate

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5
Q

What is the third test you do?

A

Chloride

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6
Q

What is the positive result for the chloride test?

A

White precipitate that dissolves in dilute ammonia solution

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7
Q

What is the fourth test you do?

A

Bromide

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8
Q

What is the positive result for the bromide test?

A

Cream precipitate that dissolves in concentrated ammonia solution

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9
Q

What is the fifth test you do?

A

Iodide

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10
Q

What is the positive result for the iodide test?

A

Yellow precipitate that won’t dissolve in dilute or concentrated ammonia solution

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11
Q

What is the sixth test you do?

A

Ammonia

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12
Q

What is the positive result for the ammonia test?

A

Effervescence that releases a gas that turns red litmus paper blue

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13
Q

What do you add to do the carbonate test?

A

Dilute acid

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14
Q

What do you add to do the sulfate test?

A

Barium solution

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15
Q

What do you add to do the chloride test?

A

Acidified silver nitrate solution

Dilute ammonia solution

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16
Q

What do you add to do the bromide test?

A

Acidified silver nitrate solution

Dilute/conc ammonia solution

17
Q

What do you add to do the iodide test?

A

Acidified silver nitrate solution

Dilute/conc ammonia solution

18
Q

What do you add to do the ammonia test?

A

Sodium hydroxide solution

19
Q

Why do you have to do the tests in a particular order?

A

To avoid false positives

Chemistry Module 3 (6 decks)

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