Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Chemistry Paper One > 3. Quantitative Chemistry > Flashcards

3. Quantitative Chemistry Flashcards

(84 cards)

Start Studying
1
Q

What should students be able to compare regarding nano dimensions?

A

Students should be able to compare ‘nano’ dimensions to typical dimensions of atoms and molecules.

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

What mathematical expressions should students recognize and use?

A

Students should recognize and use expressions in standard form.

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

What mathematical concepts should students be able to use?

A

Students should be able to use ratios, fractions, and percentages.

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

What skill involves estimating results of calculations?

A

Students should be able to make estimates of the results of simple calculations.

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

What are some applications of nanoparticles?

A

Nanoparticles have applications in medicine, electronics, cosmetics, sun creams, deodorants, and as catalysts.

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

What should students evaluate regarding nanoparticles?

A

Students should evaluate the use of nanoparticles for a specified purpose.

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

What risks are associated with the use of nanoparticles?

A

There are possible risks associated with the use of nanoparticles.

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

What is the law of conservation of mass?

A

The law of conservation of mass states that no atoms are lost or made during a chemical reaction, so the mass of the products equals the mass of the reactants.

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

How are chemical reactions represented?

A

Chemical reactions can be represented by symbol equations that are balanced in terms of the numbers of atoms of each element on both sides.

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

What is the relative formula mass (Mr) of a compound?

A

The relative formula mass (Mr) is the sum of the relative atomic masses of the atoms in the numbers shown in the formula.

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

What does a balanced chemical equation indicate about relative formula masses?

A

In a balanced chemical equation, the sum of the relative formula masses of the reactants equals the sum of the relative formula masses of the products.

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

What should students be able to calculate regarding mass in a compound?

A

Students should be able to calculate the percentage by mass in a compound given the relative formula mass and the relative atomic masses.

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

What can cause apparent changes in mass during a reaction?

A

Some reactions may appear to involve a change in mass, which can usually be explained because a reactant or product is a gas and its mass has not been taken into account.

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

What is the significance of chemical equations in chemistry?

A

Chemical equations provide a means of representing chemical reactions and are a key way for chemists to communicate chemical ideas.

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

What is the role of quantitative analysis in chemistry?

A

Quantitative analysis is used to determine the formulae of compounds and the equations for reactions, allowing analysts to determine purity and monitor yield.

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

What skills should students develop regarding chemical measurements?

A

Students should develop skills in investigating mass changes using various apparatus.

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

What should students understand about multipliers in chemical equations?

A

Students should understand the use of multipliers in equations in normal script before a formula and in subscript within a formula.

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

What is the importance of identifying different types of chemical reactions?

A

Identifying different types of chemical reactions helps chemists understand how different chemicals react, establish patterns, and make predictions.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is the focus of research regarding nanoparticulate materials?

A

New applications for nanoparticulate materials are an important area of research.

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

What should students consider about the applications of nanoparticulate materials?

A

Students should consider the advantages and disadvantages of the applications of nanoparticulate materials.

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

What is the relationship between reactants and products in a balanced equation?

A

The quantities of reactants and products in a balanced equation must be equal in terms of their relative formula masses.

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

What opportunities exist for students to investigate mass changes?

A

Opportunities exist for students to investigate mass changes using various apparatus.

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

What happens to the mass of a metal when it reacts with oxygen?

A

The mass of the oxide produced is greater than the mass of the metal.

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

What is produced during the thermal decomposition of metal carbonates?

A

Carbon dioxide is produced and escapes into the atmosphere, leaving the metal oxide as the only solid product.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
What should students be able to explain regarding changes in mass during chemical reactions?
Students should explain observed changes in mass in non-enclosed systems during a chemical reaction using the balanced symbol equation and the particle model.
26
What is a key aspect of uncertainty in measurements?
There is always some uncertainty about the result obtained whenever a measurement is made.
27
How can students represent uncertainty in measurements?
Students should represent the distribution of results and make estimations of uncertainty.
28
What is the relationship between the range of measurements and uncertainty?
The range of a set of measurements about the mean can be used as a measure of uncertainty.
29
What is the unit for measuring chemical amounts?
Chemical amounts are measured in moles, with the symbol 'mol'.
30
What is the mass of one mole of a substance in grams?
It is numerically equal to its relative formula mass.
31
What does one mole of a substance contain?
One mole of a substance contains the same number of particles (atoms, molecules, or ions) as one mole of any other substance.
32
What is the value of the Avogadro constant?
The value of the Avogadro constant is 6.02 x 10^23 per mole.
33
How can the measurement of amounts in moles apply to different entities?
It can apply to atoms, molecules, ions, electrons, formulae, and equations.
34
How many atoms are in one mole of carbon?
One mole of carbon contains the same number of atoms as the number of molecules in one mole of carbon dioxide (CO2).
35
What can students calculate using the relative formula mass of a substance?
Students can calculate the number of moles in a given mass of that substance and vice versa.
36
What can be calculated from balanced symbol equations?
The masses of reactants and products can be calculated from balanced symbol equations.
37
How is a chemical equation interpreted in terms of moles?
For example, Mg + 2HCl → MgCl2 + H2 shows that one mole of magnesium reacts with two moles of hydrochloric acid.
38
What should students be able to calculate from a balanced symbol equation?
Students should be able to calculate the masses of substances shown in the equation.
39
What is required to calculate the masses of reactants and products?
Students need the balanced symbol equation and the mass of a given reactant or product.
40
What skills are emphasized in using moles to balance equations?
Changing the subject of an equation is emphasized.
41
How can balancing numbers in a symbol equation be calculated?
By converting the masses of reactants and products from grams to moles and then to simple whole number ratios.
42
What is the limiting reactant in a chemical reaction?
The reactant that is completely used up, limiting the amount of products formed.
43
What effect does a limiting reactant have on product yield?
It limits the amount of products that can be obtained, which can be explained in terms of amounts in moles or masses in grams.
44
How is the concentration of a solution measured?
In mass per given volume of solution, such as grams per dm³ (g/dm³).
45
What should students be able to calculate regarding solute mass?
The mass of solute in a given volume of solution of known concentration.
46
What is percentage yield in a chemical reaction?
The amount of product obtained compared to the maximum theoretical amount, expressed as a percentage.
47
What factors can affect the percentage yield of a product?
1. The reaction may not go to completion because it is reversible. 2. Some product may be lost during separation. 3. Reactants may react differently than expected.
48
What is the formula for calculating percentage yield?
% Yield = (Mass of product actually made / Maximum theoretical mass of product) × 100.
49
What is atom economy?
A measure of the amount of starting materials that end up as useful products, important for sustainable development and economic reasons.
50
Why is high atom economy important?
It is crucial for sustainable development and economic efficiency in chemical processes.
51
What mathematical skills should students develop in chemistry?
Students should be able to change the subject of an equation and substitute numerical values into algebraic equations using appropriate units.
52
What does it mean to change the subject of an equation?
Rearranging an equation to isolate a specific variable.
53
What is the relationship between mass of solute, volume of solution, and concentration?
The mass of solute and volume of solution are directly related to the concentration of the solution.
54
What is the significance of using ratios, fractions, and percentages in chemistry?
They are essential for calculations involving concentrations, yields, and other quantitative measures.
55
What is meant by 'theoretical mass of a product'?
The maximum amount of product that could be formed from a given mass of reactant based on the balanced equation.
56
What skills are emphasized in the context of limiting reactants?
Students should be able to explain the effect of a limiting quantity of a reactant on the amount of products obtainable.
57
What should students be able to do with algebraic equations in chemistry?
Substitute numerical values into algebraic equations using appropriate units for physical quantities.
58
What is the importance of significant figures in calculations?
Using an appropriate number of significant figures ensures accuracy and precision in scientific calculations.
59
What is the role of excess reactants in a chemical reaction?
To ensure that all of the limiting reactant is used up, maximizing product formation.
60
What is a common outcome when a reaction does not go to completion?
The actual yield of the product is less than the theoretical yield.
61
How can students demonstrate understanding of atom economy?
By explaining how the amount of starting materials relates to the useful products formed.
62
How is the percentage atom economy of a reaction calculated?
Percentage atom economy = (Relative formula mass of desired product / Sum of relative formula masses of all reactants) × 100.
63
What skills should students develop in relation to ratios, fractions, and percentages?
Students should be able to use ratios, fractions, and percentages.
64
What is the concentration of a solution measured in?
The concentration of a solution is measured in mol/dm³.
65
How can the amount in moles of solute be calculated from its concentration?
The amount in moles of solute can be calculated using the concentration in mol/dm³ and the volume of the solution.
66
What can be determined if the volumes of two solutions that react completely are known?
If the volumes of two solutions that react completely are known and the concentration of one solution is known, the concentration of the other solution can be calculated.
67
What is the relationship between the concentration of a solution in mol/dm³ and the mass of the solute?
The concentration in mol/dm³ is related to the mass of the solute and the volume of the solution.
68
What is the volume occupied by one mole of any gas at room temperature and pressure?
One mole of any gas occupies 24 dm³ at room temperature and pressure (20°C and 1 atmosphere pressure).
69
What can be calculated from the balanced equation for a reaction involving gases?
The volumes of gaseous reactants and products can be calculated from the balanced equation.
70
What do metals react with to produce metal oxides?
Metals react with oxygen to produce metal oxides.
71
What type of reactions occur when metals react with oxygen?
These reactions are oxidation reactions because the metals gain oxygen.
72
How should students explain reduction and oxidation?
Students should explain reduction and oxidation in terms of loss or gain of oxygen.
73
What is the significance of understanding chemical changes in chemistry?
Understanding chemical changes allows scientists to predict new substances formed and develop various materials and processes.
74
What role does knowledge of chemical changes play in biochemistry?
It helps biochemists understand complex reactions that take place in living organisms.
75
What is the importance of extracting resources from the earth in relation to chemical changes?
It utilizes the way elements and compounds react with each other and how easily they can be separated.
76
What mathematical skills should students develop in relation to equations?
Students should be able to change the subject of an equation and substitute numerical values into algebraic equations using appropriate units.
77
What opportunities are available for skills development in titrations?
Opportunities include determining concentrations of strong acids and alkalis.
78
What is the significance of systematic experimentation in understanding chemical changes?
It allows for logical organization of results and predictions about new substances.
79
What should students be able to calculate regarding the volume of gases?
Students should be able to calculate the volume of a gas at room temperature and pressure from its mass and relative formula mass.
80
What is the relationship between the amount of substance and volumes of gases?
Equal amounts in moles of gases occupy the same volume under the same conditions of temperature and pressure.
81
What are the key opportunities for skills development mentioned in the notes?
Key opportunities include using ratios, fractions, percentages, changing the subject of equations, and substituting numerical values.
82
What is the role of chemical changes in material development?
Chemical changes help in developing a wide range of different materials and processes.
83
How do scientists use knowledge of chemical changes in resource extraction?
They use it to understand how elements and compounds react and can be separated.
84
What is the educational focus of the AQA GCSE Chemistry specification?
It emphasizes understanding chemical changes, calculations involving concentrations, and the reactivity of metals.

Chemistry Paper One (5 decks)

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