Brainscape's Knowledge GenomeTM

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


See full index

Molecules and Analysis > Unit 2 > Flashcards

Unit 2 Flashcards

Standard solutions and titrations

You may prefer our related Brainscape-certified flashcards:
Organic Chemistry 101 flashcards
1
Q

What is titration used for?

A

We can use it to find the amount of something. It is quantitative

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

What does titration involve?

A

the measurement of a known solution with a known concentration (titrant) is used to find the concentration of the unknown analyte

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

What happens at the endpoint of a titration?

A

A colour change. Can use an indicator to make this happen

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

What is a standard solution?

A

A solution whose concentration is known accurately

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

How do you work out moles from conc and volume?

A

Conc X volume

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

Moles triangle using conc?

A

Moles/

Conc X Vol (litres)

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

Moles triangle

A 
mass
#m X mm
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is molarity?

A

Concentration. It’s the number of moles per litre of solution

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

How do you find the concentration of a solution?

A

Moles/ volume in litres

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

How do you convert cm and ml into dm³ ( dm³ is also litre)

A

divide by 1000

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

What is dilution?

A

Preparing a less concentrated solution from a more concentrated one

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

If you dilute a substance will you change the number of moles?

A

No just the concentration

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

What is an acid

A

Proton donor

H+ ions

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

what is a base?

A

Proton acceptor

OH-

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

What happens when you add an acid to a base and what are the products?

A

Neutralisation happens and you will get water and a salt

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

What is the unit for concentration?

A

Mol dm⁻³

17
Q

What is an ionic bond?

A

the transfer of electrons. The ions are then attracted to each other by electrostatic forces

18
Q

What is oxidation?

A

Loss of electrons

19
Q

What is reduction?

A

Gain of electrons

20
Q

What are oxidation numbers used for?

A

To keep track of electrons in a reaction. Its like the charges.

21
Q

What is the oxidation state of an atom in an element?

A

0

22
Q

What is the oxidation state of oxygen?

A

-2 (except when its 0₂⁻² this case its -1)

23
Q

What is the oxidation state of hydrogen?

A

+1

24
Q

What is the oxidation state of fluorine?

A

-1

25
Q

What is a reducing agent?

A

something that reduces something. It is oxidised itself

26
Q

In titrations you need to look at what to work out unknowns?

A

The ratio of reactants. So if you can work out the number of moles of one reactant and its a 1:1 ratio the unknown reactant will have the same

27
Q

How do you make half equations

A

Make two reactions splitting the oxidation and reduction halfs. You can balance them separately

28
Q

How do you calculate molarity?

A

Moles of solute/ Litres of solution

29
Q

Molarity triangle?

A

Moles of solute

Molarity X Vol (L)

Molecules and Analysis (14 decks)

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