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One term, and every place the course uses it — the revision notes that teach it, the multiple choice questions that check it, and the detailed questions that examine it.
34 sub-topics use electrolysis · showing 1–20
AQA · Chemistry · 4.4 Chemical changes
4.4.3Electrolysis
positive electrode (the anode). Ions are discharged at the electrodes producing elements. This process is called electrolysis. Electrolyte A molten or dissolved ionic compound in which the ions are free to move, so it conducts electricity
in The process of electrolysis and 5 other sections
Edexcel · Chemistry · 3 Chemical changes
3.3Electrolysis
positive electrode (the anode). Ions are discharged at the electrodes producing elements. This process is called electrolysis. Electrolyte A molten or dissolved ionic compound in which the ions are free to move, so it conducts electricity
in The process of electrolysis and 5 other sections
Edexcel · Chemistry · 4 Extracting metals and equilibria
4.1Reactivity and extracting metals
Metals can be extracted from molten compounds using electrolysis. Electrolysis is used if the metal is too reactive to be extracted by reduction with carbon, or if the metal reacts with carbon. Large amounts of energy
in Using electrolysis to extract metals and 3 other sections
AQA · Chemistry · 4.4 Chemical changes
4.4.1Reactivity of metals
oxide; iron is less reactive than carbon, so it can be. Aluminium must be extracted by electrolysis instead. Explain why aluminium cannot be extracted by heating its oxide with carbon, but iron can. Extraction of metals
in Extraction of metals and reduction
AQA · Chemistry · 4.10 Using resources
4.10.1Using the Earth's resources and obtaining potable water
example, copper can be obtained from solutions of copper compounds by displacement using scrap iron, or by electrolysis. You should be able to evaluate alternative biological methods of metal extraction, given appropriate information. The advantages
in Alternative methods of extracting metals
Edexcel · Chemistry · 4 Extracting metals and equilibria
4.2Recycling and life cycle assessment
Used in 12 questions on this sub-topic.
AQA · Chemistry · 4.10 Using resources
4.10.2Life cycle assessment and recycling
Used in 4 questions on this sub-topic.
AQA · Chemistry · 4.5 Energy changes
4.5.2Chemical cells and fuel cells
fuel to store Where the energy comes from Hydrogen is often made from fossil fuels or by electrolysis, which needs energy The electricity used to recharge may come from fossil fuels Infrastructure Few refuelling stations exist
in Fuel cells
Edexcel · Chemistry · 5 Separate chemistry 1
5.6Chemical cells and fuel cells
fuel to store Where the energy comes from Hydrogen is often made from fossil fuels or by electrolysis, which needs energy The electricity used to recharge may come from fossil fuels Infrastructure Few refuelling stations exist
in Fuel cells
Edexcel · Chemistry · 2 States of matter and mixtures
2.2Separating and purifying mixtures
Used in 8 questions on this sub-topic.
AQA · Chemistry · 4.10 Using resources
4.10.4The Haber process and the use of NPK fertilisers
Used in 3 questions on this sub-topic.
AQA · Chemistry · 4.2 Bonding, structure, and the properties of matter
4.2.3Structure and bonding of carbon
Used in 3 questions on this sub-topic.
Edexcel · Chemistry · 1 Key concepts in chemistry
1.5Types of substance and their properties
Used in 3 questions on this sub-topic.
Edexcel · Chemistry · 5 Separate chemistry 1
5.5The Haber process and fertilisers
Used in 3 questions on this sub-topic.
AQA · Chemistry · 4.1 Atomic structure and the periodic table
4.1.1A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
Used in 5 questions on this sub-topic.
AQA · Chemistry · 4.8 Chemical analysis
4.8.2Identification of common gases
solution of a reactive metal's compound is electrolysed. Oxygen appears at the anode in the electrolysis of aqueous solutions without halide ions, and when hydrogen peroxide decomposes. Carbon dioxide appears whenever a carbonate meets
in Test for chlorine
Edexcel · Chemistry · 1 Key concepts in chemistry
1.1Atomic structure and isotopes
Used in 4 questions on this sub-topic.
Edexcel · Chemistry · 8 Fuels and Earth science
8.2Combustion and atmospheric pollutants
dioxide, and carbon monoxide and soot if combustion is incomplete Renewable? Can be made from water by electrolysis Non-renewable, from crude oil Storage Must be stored as a compressed gas or a very cold liquid
in Hydrogen as a fuel for cars
Edexcel · Chemistry · 3 Chemical changes
3.2Reactions of acids and making salts
Used in 3 questions on this sub-topic.
AQA · Chemistry · 4.3 Quantitative chemistry
4.3.3Yield and atom economy of chemical reactions
Used in 2 questions on this sub-topic.