Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Chemistry > Chemical tests > Flashcards

Chemical tests Flashcards

1
Q

How do you test for hydrogen gas?

A

Test the gas with a lit splint and listen for a squeaky pop

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How do you test for oxygen gas?

A

Relights a glowing splint

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How do you test for carbon dioxide?

A

Bubble the gas through limewater and it turns cloudy/milky

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How do test for chlorine gas?

A

It beaches moist litmus paper

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How do test for ammonia gas?

A

Moist red litmus paper turns blue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How do you do a flame test?

A

Dip a clean piece of nichrome or platinum wire into concentrated hydrochloric acid and then into the sample of solid salt. Put the wire just into the non-luminous (roaring) flame of a Bunsen burner and observe the color

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What colour is the flame test for lithium ions?

A

Red

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What colour is the flame test for sodium ions?

A

Yellow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What colour is the flame test for potassium ions?

A

Lilac

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What colour is the flame test for calcium ions?

A

Orange-red

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What colour is the flame test for copper ions?

A

Blue-green

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How do you test for cations?

A

Add sodium hydroxide (NaOH) solution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the result of adding sodium hydroxide solution to iron (II) ions?

A

Green precipitate (Fe(OH)2)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the result of adding sodium hydroxide solution to ammonium ions?

A

Upon warming the gas turns red litmus paper blue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the result of adding sodium hydroxide solution to copper (II) ions?

A

Blue precipitate (Cu(OH)2)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the result of adding sodium hydroxide solution to iron (III) ions?

A

Orange-brown precipitate (Fe(OH)3)

17
Q

What is the result of adding dilute nitric acid then silver nitrate solution to chloride ions?

A

White precipitate (AgCl)

18
Q

What is the result of adding dilute nitric acid then silver nitrate solution to bromide ions?

A

Cream precipitate (AgBr)

19
Q

What is the result of adding dilute nitric acid then silver nitrate solution to iodide ions?

A

Yellow precipitate (AgI)

20
Q

How do you test for carbonate ions?

A

Add dilute hydrochloric acid then test the gas with limewater. It should turn cloudy/milky due to the carbon dioxide given off

21
Q

How do you test for sulphate ions?

A

Add dilute hydrochloric acid then barium chloride solution to form a white precipitate of BaSO4

22
Q

Why is acid added before reagent when testing for halides and sulphide ions?

A

To react with any carbonate ions which would also form a precipitate

23
Q

How do you test for water?

A

It turns white anhydrous copper (II) sulphate blue

24
Q

How do you test for pure water?

A

It boils at 100oc and freezes at 0oc

Chemistry (24 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions