Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

chemistry > C8 20 Questions > Flashcards

C8 20 Questions Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Chemistry flashcards Periodic Table flashcards Chemistry 101 flashcards Organic Chemistry 101 flashcards
1
Q

How can you test for hydrogen gas?

A

Lit splint- Squeaky pop

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

How can you test for oxygen gas?

A

Glowing splint- relights

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

How can you test for carbon dioxide gas?

A

Limewater- Cloudy

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

How can you test for chlorine gas?

A

Litmus paper- Bleaches

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

How do you calculate the Rf value of a substance?

A

Distance moved by substance/distance moved by solvent.

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

What is the mobile phase in chromatography?

A

Water/solvent

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

What is the stationary phase in chromatography?

A

Paper

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

What is a pure substance?

A

Single element or compound

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

What is a formulation?

A

Mixture to make a useful product.

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

What colour flame is produced when a sample of barium is used in a flame test?

A

Green

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

What type of substances can be analyzed using flame spectroscopy?

A

Solutions containing metal ions

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

How can you test if a substance is pure?

A

Specific melting/boiling point.

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

Give four advantages of instrumental methods of analysis

A

Very fast, very sensitive, accurate, can be used on small samples

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

What is a precipitate?

A

A solid formed when two solutions are mixed.

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

What colour is a copper(II)hydroxide precipitate?

A

Blue

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

ow can a sulfate be identified?

A

Add dilute hydrochloric acid and barium chloride solution; look for a white precipitate of barium sulfate

15
Q

In chromatography, why must the line that the substances are placed on, be drawn in pencil?

A

Pencil will not dissolve in the solvent.

16
Q

What colour is a precipitate of silver bromide?

A

Cream

17
Q

In chromatography what does the Rf value depend on?

A

How soluble the solute is in the solvent.

18
Q

In chromatography why must the solvent height be lower than the pencil line?

A

So that the substances do not dissolve into the solvent off the paper

chemistry (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions