Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Chemistry Paper 1 > Topic C3 - Quantitative Chemistry > Flashcards

Topic C3 - Quantitative Chemistry Flashcards

1
Q

How do you work out isotopes?

A

Neutrons + Protons

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

How many electrons fill up each shell?

A 
1st = 2
2nd = 8
3rd = 8
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What does one mole = ?

A

6.02 x 10^23

particles of a substance

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

The number of a moles in a sample =

A

Mass of that element or compound
——————————————————
Relative Formula Mass

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

What is a mole?

A

A unit we use to measure the amount of chemical we have.

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

What is Avogrados Constant?

A

6.02 x 10^23

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

Relative formula mass =

A

All atomic mass values added together for all the atoms in its formula

e.g CO2

Carbon = 12
Oxygen = 16.        Oxygen x2 = 32

12+32 = 44 = relative formula mass

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

Relative formula mass symbol?

A

M r

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

Relative Atomic Mass symbol

A

A r

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

Can atoms be created or destroyed in a chemical reaction?

A

No

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

In chemical reaction what happens to the total mass of the reactants and products?

A

They will both be the same.

MASS IS CONSERVED

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

How could there be a decrease in mass during a chemical reaction?

A

If a gas is made during the reaction and escapes the vessel

It’s mass is no longer accounted for.

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

How could there be an increase in mass during a chemical reaction?

A

If a gas from the air is a reactant. And so it’s mass is added to the mass in the vessel.

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

What do balanced equations tell us about moles?

A

How many moles of each substance take part in the reaction.

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

Concentration definition

A

Amount of substance dissolved in a certain volume of solution.

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

What happens to concentration when you increase the amount of solute?

A

Concentration increases when amount of solute increases.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What happens too concentration when the volume of solvent is increased?

A

Concentration decreases when the volume of solvent increases.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is the formula for concentration?

A

Concentration

=

Mass of solute  —————————   Volume of solvent
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is MASH?

A

Metal + acid —> salt + hydrogen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is MASH but with metal carbonate?

A

Metal carbonate + acid

—>

salt + water + carbon dioxide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is PANIC?

A

Positive
Is
Anode

Negative
Is
Cathode

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Limiting reactant definition

A

A reactant that gets completely used up in a reaction, so limits the amount of product formed.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

How can the mass of the product be worked out with the limiting reactant.

A

1) write a balanced equation for reaction
2) divide limiting reactant mass by its relative formula mass to find the no. Of moles
3) use balanced equation to find the number of moles of the product
4) multiply that number of moles by the relative formula mass of the product to work out its mass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What 2 ways can pH be measured?

A

1) Universal Indicator - gives a pH colour

2) pH probe - gives accurate value of the pH

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
What colour are acids on the Ph scale?
Red/Yellow
26
What colour are alkalis on the pH scale?
Blue/Purple
27
What colour is neutral on the pH scale?
Green
28
What number is neutral on the pH scale?
7
29
What are neutralisation reactions?
When the products of reactions are neutral
30
What does the first part of a salts name come from in a reaction?
Comes from the positive ion in the base, alkali, or carbonate. e.g HCl produces: chloride salt
31
How are soluble salts made?
By adding metals or insoluble metal compounds to acids. Excess solid is filtered off and the remaining salt solution is crystallised.
32
String acid definition
An acid that completely ionises in water to produce hydrogen ions
33
What are examples of strong acids?
1) Hydrochloric acid 2) Sulfuric acid 3) Nitric acid
34
Weak acid definition
An acid that partially ionises in water to produce hydrogen ions.
35
Examples of weak acids
1) ethanoic acid 2) citric acid 3) carbonic acid
36
What is pH definition
A measure of the concentration of H+ ions in a solution.
37
What is acid strength a measure of?
The proportion of acid molecules that ionise in water
38
What is acid concentration a measure of?
The number of acid molecules in a certain volume of water.
39
What happens to metals and ability to form positive ions on the reactivity series?
More reactive = Easier to form positive ions
40
What are the three Cs in the reactivity series in order?
Calcium Carbon Copper
41
What is a way to remember the reactivity series?
``` Please Send Lions Cats Monkeys Cute Zebras Into Hot Countries ```
42
What is the reactivity series?
``` Potassium Sodium Lithium Calcium Magnesium Carbon Zinc Iron Hydrogen Copper ```
43
What
44
What metals are extracted from molten compounds using electrolysis?
``` Please Send Lions Cats Monkeys ```
45
What does a metal + oxygen produce?
Metal oxide
46
What does a metal + acid produce?
Salt + hydrogen
47
What does a metal + water produce?
Metal hydroxide + hydrogen
48
Displacement reaction definition
When a more reactive element displaces a less reactive metal from its compound
49
How does: K, Na, Li, and Ca react when put in acid or water?
When in cold dilute acid: - explosive reaction When in water: - reaction
50
How does: Mg, Xn, Fe react when in acid or water?
Cold dilute acid: - moderate reaction Water: - no reaction
51
How does copper react with acid or water?
No reaction at all.
52
The more reactive the metal, the faster bubbles…
the faster bubbles of hydrogen will be produced
53
Oxidation is the…
Gain of oxygen and loss of electrons.
54
Reduction is the…
Gain of electrons and loss of oxygen
55
Redox reaction definition
Where one substance in a reaction is reduced and another is oxidised. Metal-acid reactions are redox reactions.
56
Ionic equations only show the particles…
the particles that react and the products they form.
57
Endothermic takes…
Takes in energy Shown by a fall in temperature
58
Exothermic transfers…
Energy to the surroundings Shown by a rise in temperature
59
Exothermic reactions examples?
Combustion Neutralisation Most oxidation reactions.
60
Endothermic reactions example?
Thermal decompositions
61
Uses of Exothermic reactions
Hand warmers
62
Uses of endothermic reactions?
Sport injury packs

Chemistry Paper 1 (1 decks)

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