GradeGen

How each exam board covers it

AQA GCSE Chemistry · 8462

Specification 4.4.3.1, 4.4.3.3, 4.4.3.4, 4.10.1.4 · Paper 1, Paper 2

The process in which an electric current passes through an electrolyte, causing ions to move to electrodes and react there.
Electrolysis is this process of using an electric current to bring about chemical change in an electrolyte; it is not simply a physical separation of the ions.
Revise: Electrolysis Principles
The breakdown of an ionic compound by passing an electric current through it while its ions are free to move.
Revise: Electrolysis of Aluminium
The breakdown of an ionic substance by passing an electric current through it when molten or dissolved in water.
Revise: Electrolysis of Aqueous Solutions

1 more note

The decomposition of an ionic substance using an electric current.
Revise: Alternative Metal Extraction

AQA Chemistry past papers

Edexcel GCSE Chemistry · 1CH0

Specification 3.23, 3.25, 3.26, 3.31, 4.7 · Paper 1

The decomposition of an electrolyte using electrical energy from a direct current supply.
Electrolysis is a process in which electrical energy from a direct current (d.c.) supply decomposes an electrolyte. To decompose a substance means to split it chemically into simpler substances.
Revise: Electrolysis Definition
The decomposition of an electrolyte by passing a direct electric current through it.
Revise: Products of Electrolysis
The decomposition of an electrolyte by electrical energy from a direct current supply.
Revise: Predicting Molten Electrolysis Products

3 more notes

The breakdown of an ionic substance by passing a direct electric current through it when molten or in solution.
Revise: Core Practical: Electrolysis of Copper Sulfate
The decomposition of an electrolyte by electricity from a direct-current supply.
Revise: Suggested Practicals
The decomposition of an ionic compound by passing a direct electric current through it while it is molten or dissolved.
Revise: Extraction Methods and Reactivity

Edexcel Chemistry past papers

OCR GCSE Chemistry A · J248

Specification C3.4a, C3.4b, C3.4c, C3.4d, C3.4e, C6.1b, PAG 2 · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)

The decomposition of an ionic substance by passing an electric current through it while it is molten or dissolved in water.
Electrolysis uses electrical energy to split an ionic substance. The substance being electrolysed must be molten or dissolved in water so that its ions are free to move. In a solid ionic lattice, the ions are fixed in position, so they cannot carry charge through the substance.
Revise: Electrode Products
The decomposition of an ionic substance by passing an electric current through it.
Revise: Molten Electrolysis Products
The decomposition of an ionic substance, when molten or in aqueous solution, by passing an electric current through it.
Revise: Aqueous Electrolysis Products

4 more notes

The decomposition of an ionic substance, when molten or dissolved in water, by passing an electric current through it.
Revise: Electrode Reactions
The decomposition of an ionic substance by passing a direct electric current through it while it is molten or dissolved in water.
Revise: Electrolysis Techniques
The breakdown of an ionic substance using an electric current.
Revise: Electrolytic Extraction
The decomposition of an ionic substance by passing a direct electric current through it while its ions are free to move.
Revise: Electrolysis: Setup and Aqueous Solutions

OCR Chemistry A past papers

OCR GCSE Chemistry B · J258

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

The decomposition of an electrolyte by an electric current.
Highly reactive metals such as potassium, sodium, calcium, aluminium and magnesium must instead be extracted using electrolysis.
Revise: Extraction by electrolysis
Revise: Description of electrolysis
Revise: Products of molten electrolysis

4 more notes

Revise: Electrodes and products
Revise: Extraction of aluminium
Revise: Technique of aqueous electrolysis
The breakdown of an ionic substance by passing direct electric current through it when molten or dissolved in water.
Revise: Apparatus and techniques

OCR Chemistry B past papers

Exam tips

1
In electrolysis, the cathode is negative and attracts positive ions; the anode is positive and attracts negative ions.
2
Avoid absolute claims such as “no environmental damage” or “no energy is needed”. Burning, processing the products and electrolysis can still consume energy or affect the environment.
3
Include all three essential ideas in a definition of electrolysis: an electrolyte is decomposed, electrical energy is supplied, and the supply is direct current (d.c.).

How each exam board covers it

AQA GCSE Chemistry · 8462

Specification 4.4.3.1, 4.4.3.3, 4.4.3.4, 4.10.1.4 · Paper 1, Paper 2

The process in which an electric current passes through an electrolyte, causing ions to move to electrodes and react there.
Electrolysis is this process of using an electric current to bring about chemical change in an electrolyte; it is not simply a physical separation of the ions.
Revise: Electrolysis Principles
The breakdown of an ionic compound by passing an electric current through it while its ions are free to move.
Revise: Electrolysis of Aluminium
The breakdown of an ionic substance by passing an electric current through it when molten or dissolved in water.
Revise: Electrolysis of Aqueous Solutions

1 more note

The decomposition of an ionic substance using an electric current.
Revise: Alternative Metal Extraction

AQA Chemistry past papers

Edexcel GCSE Chemistry · 1CH0

Specification 3.23, 3.25, 3.26, 3.31, 4.7 · Paper 1

The decomposition of an electrolyte using electrical energy from a direct current supply.
Electrolysis is a process in which electrical energy from a direct current (d.c.) supply decomposes an electrolyte. To decompose a substance means to split it chemically into simpler substances.
Revise: Electrolysis Definition
The decomposition of an electrolyte by passing a direct electric current through it.
Revise: Products of Electrolysis
The decomposition of an electrolyte by electrical energy from a direct current supply.
Revise: Predicting Molten Electrolysis Products

3 more notes

The breakdown of an ionic substance by passing a direct electric current through it when molten or in solution.
Revise: Core Practical: Electrolysis of Copper Sulfate
The decomposition of an electrolyte by electricity from a direct-current supply.
Revise: Suggested Practicals
The decomposition of an ionic compound by passing a direct electric current through it while it is molten or dissolved.
Revise: Extraction Methods and Reactivity

Edexcel Chemistry past papers

OCR GCSE Chemistry A · J248

Specification C3.4a, C3.4b, C3.4c, C3.4d, C3.4e, C6.1b, PAG 2 · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)

The decomposition of an ionic substance by passing an electric current through it while it is molten or dissolved in water.
Electrolysis uses electrical energy to split an ionic substance. The substance being electrolysed must be molten or dissolved in water so that its ions are free to move. In a solid ionic lattice, the ions are fixed in position, so they cannot carry charge through the substance.
Revise: Electrode Products
The decomposition of an ionic substance by passing an electric current through it.
Revise: Molten Electrolysis Products
The decomposition of an ionic substance, when molten or in aqueous solution, by passing an electric current through it.
Revise: Aqueous Electrolysis Products

4 more notes

The decomposition of an ionic substance, when molten or dissolved in water, by passing an electric current through it.
Revise: Electrode Reactions
The decomposition of an ionic substance by passing a direct electric current through it while it is molten or dissolved in water.
Revise: Electrolysis Techniques
The breakdown of an ionic substance using an electric current.
Revise: Electrolytic Extraction
The decomposition of an ionic substance by passing a direct electric current through it while its ions are free to move.
Revise: Electrolysis: Setup and Aqueous Solutions

OCR Chemistry A past papers

OCR GCSE Chemistry B · J258

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

The decomposition of an electrolyte by an electric current.
Highly reactive metals such as potassium, sodium, calcium, aluminium and magnesium must instead be extracted using electrolysis.
Revise: Extraction by electrolysis
Revise: Description of electrolysis
Revise: Products of molten electrolysis

4 more notes

Revise: Electrodes and products
Revise: Extraction of aluminium
Revise: Technique of aqueous electrolysis
The breakdown of an ionic substance by passing direct electric current through it when molten or dissolved in water.
Revise: Apparatus and techniques

OCR Chemistry B past papers

Exam tips

1
In electrolysis, the cathode is negative and attracts positive ions; the anode is positive and attracts negative ions.
2
Avoid absolute claims such as “no environmental damage” or “no energy is needed”. Burning, processing the products and electrolysis can still consume energy or affect the environment.
3
Include all three essential ideas in a definition of electrolysis: an electrolyte is decomposed, electrical energy is supplied, and the supply is direct current (d.c.).

Electrolysis

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

Electrolysis

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