2 h Chemical tests Flashcards

1
Q

What is the test for ammonia gas

A

Damp red litmus paper

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2
Q

What is the test for Carbon dioxide

A

Bubble through lime water

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2
Q

What is the test for chlorine gas

A

Damp blue litmus paper

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3
Q

What is the result for ammonia gas test

A

Litmus paper turns blue

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3
Q

What is the test for oxygen

A

Hold a glowing splint

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3
Q

What is the test for hydrogen

A

Hold a lighted splint in the test tube

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4
Q

What is the result for carbon dioxide gas test

A

Lime water turns milky

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5
Q

What is the result for chlorine gas test

A

Litmus paper is bleached

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6
Q

What is the result for hydrogen gas test

A

The splint burns with a squeaky pop

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7
Q

What is the result for oxygen gas test

A

The glowing splint relights

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8
Q

Appearance of the test for ammonia gas

A

Colourless, pungent smell

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9
Q

Appearance of the test for carbon dioxide gas

A

Colourless, odourless

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10
Q

Appearance of the test for chlorine gas

A

Pale green, choking smell

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11
Q

Appearance of the test for hydrogen gas

A

Colourless and odourless

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12
Q

Appearance of the test for oxygen gas

A

Colourless and odourless

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13
Q

In a flame test, what colour is lithium

14
Q

In a flame test, what colour is potassium

15
Q

In a flame test, what colour is Calcium

A

Orange - red

16
Q

In a flame test, what colour is Copper

A

Blue - green

17
Q

In a flame test, what colour is sodium

18
Q

What is the order of the rainbow of the metals flame test

A

Lithium - red
Calcium - orange - red
Sodium - yellow
Copper - Blue - green
Potassium - Lilac

19
Q

How to clean a metal wire used for flame test

A

Dip it in HCL acid, then put in on fire, repeat until no colour

20
Q

How to test for copper, iron (II) & (III)

A

-Add sodium hydroxide
-Precipitation reaction

21
Q

Precipitate of copper hydroxide

A

Light blue

22
Precipitate of Iron (II) hydroxide
Green
23
Precipitate of Iron (III) hydroxide
Brown
24
How to detect ammonium ions (NH4+)
-Add sodium hydroxide (no precipitate, smell of ammonia) -Test with damp red litmus paper (turns blue)
25
How to detect halides
-Add nitric acid -Add silver nitrate
26
Precipitate of silver chloride
White
27
Precipitate of silver bromide
Cream
28
Precipitate of silver iodide
Yellow
29
How to detect sulfates
-Add dilute HCL acid -Add barium chloride
30
What is the result of detecting sulfates
Barium sulfate, white precipitate
31
How to detect carbonates
-Add dilute nitric acid -Fizzing indicates carbon dioxide -Test for carbon dioxide using lime water
32
What is the chemical test for water
White anhydrous copper sulfate turns blue
33
What is the physical test for water / check if its pure
-Check the boiling point -Should be 100ºC