GradeGen

How each exam board covers it

AQA GCSE Chemistry · 8462

Specification 4.1.3.2, 4.2.4.2, 4.6.1.2, 4.6.1.4, 4.7.1.4, 4.10.4.1 · Paper 1, Paper 2

A substance that changes the rate of a chemical reaction without being used up overall.
Many of them show three characteristic chemical properties: they form ions with different charges, form coloured compounds and are useful as catalysts. These are general patterns, so many does not mean that every transition element or every one of its compounds displays all three properties.
Revise: Typical Transition Metal Properties
A substance that increases the rate of a reaction without being used up in the overall reaction.
Revise: Applications of Nanoparticles
Revise: Factors Affecting Rate

4 more notes

A substance that changes the rate of a chemical reaction without being used up during the reaction.
Revise: Catalysts and Activation Energy
A substance that increases the rate of a reaction without being used up.
Revise: Cracking and Alkenes
A substance that increases reaction rate without being used up by providing an alternative reaction pathway with a lower activation energy.
Revise: The Haber Process
A substance that increases the rate of a reaction by providing a different pathway with a lower activation energy, without being used up overall.
Revise: Chemical Energetics and Kinetics

AQA Chemistry past papers

Edexcel GCSE Chemistry · 1CH0

Specification 4.16, 5.1C, 5.20C, 5.21C, 7.6, 7.7, 7.8, 8.16 · Paper 1, Paper 2

A substance that increases the rate of a reaction without being used up overall.
Iron acts as a catalyst, increasing the rate at which equilibrium is reached. It provides an alternative reaction pathway with a lower activation energy and is not used up overall.
Revise: Haber Process Conditions
A substance that increases the rate of a chemical reaction without being used up.
Revise: Transition Metals Properties
A substance that increases the rate of a reaction without being chemically changed or changing in mass overall.
Revise: Rate of Attainment of Equilibrium

6 more notes

A catalyst is a substance that increases the rate of a reaction without being used up.
Revise: Conditions in Industrial Reactions
A substance that increases the rate of a chemical reaction without altering its products, and is unchanged chemically and in mass at the end of the reaction.
Revise: Definition of Catalyst
A substance that increases the rate of a reaction without being chemically changed or used up overall.
Revise: Catalysts and Activation Energy
A substance that increases the rate of a reaction without changing its products and is unchanged chemically and in mass at the end.
Revise: Enzymes
Revise: Suggested Practicals
Revise: Cracking

Edexcel Chemistry past papers

OCR GCSE Chemistry A · J248

Specification C2.3i, C4.1c, C5.2f, C5.2g, C5.2h, C5.2i, C6.1d, C6.1f, C6.2o · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)

A substance that speeds up a chemical reaction without being used up overall.
Surface atoms can interact with other substances, so a large exposed surface can make the material useful as a catalyst. It provides many places where reacting substances can meet the catalyst. The same opportunity for surface interactions can be used in sensitive, selective sensors designed to detect particular substances.
Revise: Properties and Uses of Nanoparticles
A substance that increases the rate of a reaction without being used up.
Revise: Transition Metals
Revise: Catalysts Characteristics

6 more notes

A substance that increases the rate of a chemical reaction without being used up or chemically changed overall.
Revise: Identifying Catalysts
Revise: Catalysis and Activation Energy
A substance that increases the rate of a chemical reaction without being used up.
Revise: Enzymes
A substance that increases the rate of a reaction without being used up; it does not change the position of equilibrium.
Revise: Industrial Trade-offs
Revise: Industrial Conditions Justification
A substance that speeds up a chemical reaction without being used up.
Revise: Cracking

OCR Chemistry A past papers

OCR GCSE Chemistry B · J258

Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)

Exhaust gases pass through a ceramic honeycomb coated with catalysts such as platinum, palladium or rhodium. The honeycomb provides a large surface area on which reactions can occur.
Revise: Problems and reduction of pollutants
Revise: Properties of transition metals
A substance that speeds up a chemical reaction without being used up.
Revise: Cracking

10 more notes

Revise: Surface area to volume ratio
A substance that increases the rate of a reaction without being used up overall.
Revise: Properties and uses of nanoparticles
A substance that increases the rate of a chemical reaction and is chemically unchanged at the end of the reaction.
Revise: Catalysts
A substance that increases the rate of a chemical reaction and can be recovered chemically unchanged at the end.
Revise: Identifying catalysts
Revise: Catalytic action
A substance that increases the rate of a chemical reaction without being used up.
Revise: Enzymes
A substance that increases reaction rate without being used up; it does not change the position of equilibrium.
Revise: Equilibrium position
A substance that increases the rate of a reaction without being used up.
Revise: Haber process conditions
A substance that increases reaction rate without being used up or changing the equilibrium position.
Revise: Rate vs equilibrium trade-off
A substance that speeds up a chemical reaction without being used up by it.
Revise: Positive impact of science

OCR Chemistry B past papers

Exam tips

1
Use many, not all: many transition elements form ions with different charges and coloured compounds, and are useful as catalysts.
2
Do not say that a catalyst is used up. State that it changes the reaction rate and is regenerated, so it remains chemically unchanged overall.
3
For an explanation, give the complete chain: the catalyst provides a different pathway with lower activation energy, so a greater proportion of collisions are successful and the rate increases.

How each exam board covers it

AQA GCSE Chemistry · 8462

Specification 4.1.3.2, 4.2.4.2, 4.6.1.2, 4.6.1.4, 4.7.1.4, 4.10.4.1 · Paper 1, Paper 2

A substance that changes the rate of a chemical reaction without being used up overall.
Many of them show three characteristic chemical properties: they form ions with different charges, form coloured compounds and are useful as catalysts. These are general patterns, so many does not mean that every transition element or every one of its compounds displays all three properties.
Revise: Typical Transition Metal Properties
A substance that increases the rate of a reaction without being used up in the overall reaction.
Revise: Applications of Nanoparticles
Revise: Factors Affecting Rate

4 more notes

A substance that changes the rate of a chemical reaction without being used up during the reaction.
Revise: Catalysts and Activation Energy
A substance that increases the rate of a reaction without being used up.
Revise: Cracking and Alkenes
A substance that increases reaction rate without being used up by providing an alternative reaction pathway with a lower activation energy.
Revise: The Haber Process
A substance that increases the rate of a reaction by providing a different pathway with a lower activation energy, without being used up overall.
Revise: Chemical Energetics and Kinetics

AQA Chemistry past papers

Edexcel GCSE Chemistry · 1CH0

Specification 4.16, 5.1C, 5.20C, 5.21C, 7.6, 7.7, 7.8, 8.16 · Paper 1, Paper 2

A substance that increases the rate of a reaction without being used up overall.
Iron acts as a catalyst, increasing the rate at which equilibrium is reached. It provides an alternative reaction pathway with a lower activation energy and is not used up overall.
Revise: Haber Process Conditions
A substance that increases the rate of a chemical reaction without being used up.
Revise: Transition Metals Properties
A substance that increases the rate of a reaction without being chemically changed or changing in mass overall.
Revise: Rate of Attainment of Equilibrium

6 more notes

A catalyst is a substance that increases the rate of a reaction without being used up.
Revise: Conditions in Industrial Reactions
A substance that increases the rate of a chemical reaction without altering its products, and is unchanged chemically and in mass at the end of the reaction.
Revise: Definition of Catalyst
A substance that increases the rate of a reaction without being chemically changed or used up overall.
Revise: Catalysts and Activation Energy
A substance that increases the rate of a reaction without changing its products and is unchanged chemically and in mass at the end.
Revise: Enzymes
Revise: Suggested Practicals
Revise: Cracking

Edexcel Chemistry past papers

OCR GCSE Chemistry A · J248

Specification C2.3i, C4.1c, C5.2f, C5.2g, C5.2h, C5.2i, C6.1d, C6.1f, C6.2o · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)

A substance that speeds up a chemical reaction without being used up overall.
Surface atoms can interact with other substances, so a large exposed surface can make the material useful as a catalyst. It provides many places where reacting substances can meet the catalyst. The same opportunity for surface interactions can be used in sensitive, selective sensors designed to detect particular substances.
Revise: Properties and Uses of Nanoparticles
A substance that increases the rate of a reaction without being used up.
Revise: Transition Metals
Revise: Catalysts Characteristics

6 more notes

A substance that increases the rate of a chemical reaction without being used up or chemically changed overall.
Revise: Identifying Catalysts
Revise: Catalysis and Activation Energy
A substance that increases the rate of a chemical reaction without being used up.
Revise: Enzymes
A substance that increases the rate of a reaction without being used up; it does not change the position of equilibrium.
Revise: Industrial Trade-offs
Revise: Industrial Conditions Justification
A substance that speeds up a chemical reaction without being used up.
Revise: Cracking

OCR Chemistry A past papers

OCR GCSE Chemistry B · J258

Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)

Exhaust gases pass through a ceramic honeycomb coated with catalysts such as platinum, palladium or rhodium. The honeycomb provides a large surface area on which reactions can occur.
Revise: Problems and reduction of pollutants
Revise: Properties of transition metals
A substance that speeds up a chemical reaction without being used up.
Revise: Cracking

10 more notes

Revise: Surface area to volume ratio
A substance that increases the rate of a reaction without being used up overall.
Revise: Properties and uses of nanoparticles
A substance that increases the rate of a chemical reaction and is chemically unchanged at the end of the reaction.
Revise: Catalysts
A substance that increases the rate of a chemical reaction and can be recovered chemically unchanged at the end.
Revise: Identifying catalysts
Revise: Catalytic action
A substance that increases the rate of a chemical reaction without being used up.
Revise: Enzymes
A substance that increases reaction rate without being used up; it does not change the position of equilibrium.
Revise: Equilibrium position
A substance that increases the rate of a reaction without being used up.
Revise: Haber process conditions
A substance that increases reaction rate without being used up or changing the equilibrium position.
Revise: Rate vs equilibrium trade-off
A substance that speeds up a chemical reaction without being used up by it.
Revise: Positive impact of science

OCR Chemistry B past papers

Exam tips

1
Use many, not all: many transition elements form ions with different charges and coloured compounds, and are useful as catalysts.
2
Do not say that a catalyst is used up. State that it changes the reaction rate and is regenerated, so it remains chemically unchanged overall.
3
For an explanation, give the complete chain: the catalyst provides a different pathway with lower activation energy, so a greater proportion of collisions are successful and the rate increases.

Catalyst

Definition

How each exam board covers it

AQA GCSE Chemistry · 8462

Edexcel GCSE Chemistry · 1CH0

OCR GCSE Chemistry A · J248

OCR GCSE Chemistry B · J258

Exam tips

Revise Chemistry with GradeGen

Catalyst

Definition

How each exam board covers it

AQA GCSE Chemistry · 8462

Edexcel GCSE Chemistry · 1CH0

OCR GCSE Chemistry A · J248

OCR GCSE Chemistry B · J258

Exam tips

Revise Chemistry with GradeGen

Definition

How each exam board covers it

AQA GCSE Chemistry · 8462

Edexcel GCSE Chemistry · 1CH0

OCR GCSE Chemistry A · J248

OCR GCSE Chemistry B · J258

Exam tips

Related key terms

Revise Chemistry with GradeGen

Definition

How each exam board covers it

AQA GCSE Chemistry · 8462

Edexcel GCSE Chemistry · 1CH0

OCR GCSE Chemistry A · J248

OCR GCSE Chemistry B · J258

Exam tips

Related key terms

Revise Chemistry with GradeGen