Brainscape's Knowledge GenomeTM

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


See full index

Chemistry Module 2 > 2.1.4 and 2.1.5 - Acids and Redox > Flashcards

2.1.4 and 2.1.5 - Acids and Redox Flashcards

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

When an acid is added to water, what ion is released into the solution?

A

Hydrogen ion (H+)

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

What is an acid?

A

Proton Donor

–> compound that donates a hydrogen ion (H+) to another compound in an acid-base reaction

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

Describe the dissociation of a strong acid.

A

Full dissociation

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

Define base

A

Proton acceptor
–> substance that can accept a proton (H+) from another substance in a chemical reaction

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

What is an alkali?

A

Any base substance that dissolves in water to produce OH (hydroxide) ions and neutralise acids

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

Which base is used to treat acid ingestion?

A

Magnesium Hydroxide

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

What are alkalis?

A

Bases that can dissolve in water to form aqueous hydroxide ions.

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

What are amphoteric substances?

A

Substance that can act as acids and bases.

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

What is formed when an acid reacts with a carbonate?

HINT: CASHOCO

A

Carbonate + Acid –> Salt + H2O + CO2

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

What is a salt?

A

A compound that is formed when H+ of an ion is replaced by a metal ion or positive ion.

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

What is formed when acids react with metal oxide?

A

Salt + Water

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

What is formed when an acid reacts with an alkali?

A

Salt + Water

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

What is formed when acids react with metal?

HINT: MASH

A

Metal + Acid –> Salt + Hydrogen

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

What is formed when a Base and Acid react together?

HINT: BASHO

A

Base + Acid –> Salt + Water

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

Why are the products the same when acids react with alkali or metal oxides?

A

Both alkali and metal oxides are type of bases.

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

How are ammonium salts formed?

A

When acid reacts with aqueous ammonia.

17
Q

What are hydrated crystals?

A

A crystalline structure containing water

18
Q

What does anhydrous crystals mean?

A

Crystalline form that contains no water.

19
Q

What does a dot formula indicate?

A

The amount of water present in a crystalline structure

20
Q

Write down the method to carry out a titration.

A
  1. Using a pipette, measure the volume of a solution.
  2. Add the solution into a conical flask and add an indicator to it.
  3. Add the other solution into the burette and record the volume.
  4. Slowly add the solution from the burette into the conical flask.
  5. Swirl the mixture continuously until the end point is reached.
  6. Repeat until concordant results are obtained.
21
Q

What is the colour of methyl organge in an acid, base and at the end point?

A

Acid = Red
Base = Yellow
End Point = Orange

22
Q

What is an oxidation number?

A

The number of electrons an atom uses to bond with any other atom.

23
Q

What is the oxidation number of an uncombined elements such as C, H, O2?

A

0

24
Q

What is the oxidation number of combined oxygen such as in H2O?

A

-2

25
Q

What is the oxidation number of oxygen in peroxides?

A

-1

26
Q

What is the oxidation number of combined hydrogen such as in NH3, H2S?

A

+1

27
Q

What is the oxidation number of hydrogen in metal hydrides such as LiH?

A

-1

28
Q

What is the oxidation number of a simple ion?

A

Charge on the ion.
E.g., Na+ –> +1; Cl- –> -1

29
Q

What is the oxidation number of combined fluorine such as in NaF, CaF2?

A

-1

30
Q

When an element has more than one stable oxidation number how is it indicated?

A

Written as a Roman Numeral.

31
Q

What is the oxidation number of Fe in Iron (III) chlroide?

A

+3

32
Q

What are oxyanions?

A

Negative ions that have an element along with oxygen

33
Q

What is the oxidation number of S in SO4(2-)?

A

+6

Because: combined oxygen has an oxidation number of -2

4 x -2 = -8

The charge on the compoun is -2. Sum of oxidation numbers must equal -2.

So, -2 -(-8) = +6

34
Q

Define oxidation in terms of electron transfer and oxidation number.

A

Oxidation is:
- Loss of electrons
- An increase in oxidation number

35
Q

Define reduction in terms of electron transfer and oxidation number.

A

Reduction is:
- gain of electrons
- A decrease in oxidation number

36
Q

What is a redox reaction?

A

A reaction in which both oxidation and reduction takes place.

37
Q

What is the oxidation number of a metal?

A

0 –> as it is an uncombined element.

Chemistry Module 2 (6 decks)

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