Acids and alkalis (Edexcel GCSE Chemistry): Flashcards

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Acids and alkalis
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pH of acids

Less than 7

Ions formed by acids in water

H+H⁺ ions (hydrogen ions)

Effect of higher H+H⁺ concentration on pH

More acidic solution and lower pH

What is an alkali?

A base that is soluble in water

pH of alkalis

Greater than 7

Ions formed by alkalis in water

OH−OH⁻ ions (hydroxide ions)

Effect of higher OH−OH⁻ concentration on pH

More alkaline solution and higher pH

What is a base?

Substance that reacts with acid to produce salt and water

What a base becomes when dissolved in water

An alkali

Purpose of indicators

Test if solution is acidic, neutral, or alkaline

Litmus colour in acidic solution

Red

Litmus colour in alkaline solution

Blue

Phenolphthalein colour in alkaline solution

Pink

Products of acid + base neutralisation

Salt and water

What H+H⁺ and OH−OH⁻ ions form in neutralisation

Water (H2OH₂O)

Explore Edexcel GCSE Chemistry Revision Notes by Topics

Ionic bonding

Ionic Compounds

Covalent bonding

Simple molecular structures

Giant covalent structures

Diamond

Graphite

Graphene & Fullerenes

Metallic bonding

States of Matter

Simple and Fractional Distillation

Filtration & Crystallisation

Chromatography

Water treatment

Acids and alkalis

Investigating neutralisation reactions

Show more

Metallic bonding

States of Matter

Simple and Fractional Distillation

Filtration & Crystallisation

Chromatography

Water treatment

Acids and alkalis

Investigating neutralisation reactions

Strong & Weak Acids

Reactions of acids

Making insoluble salts

Making soluble salts

The Reactivity Series

Reactivity of metals

Displacement reactions

Extracting metals using carbon

The Process of Electrolysis

Electrolysis to extract metals

Biological methods to extract metals

Recycling

Life cycle assessments

Dynamic equilibrium

Le Chatelier’s Principle: Changing Concentration

Calculation with gases

Percentage yield

Atom economy

Choosing a reaction pathway

Typical Properties of Transition Metals

Alloys as Useful Materials

Corrosion & Its Prevention

The Haber Process

Fertilisers

Fuel cells

Group 1 – Alkali metals

Group 7 – Halogens

Halogen displacement reactions

Group 0 - Noble Gases

Rates of reaction

Factors that Affect the Rate of Reaction

Rate experiments involving precipitation

Calculating Rates of Reactions

Collision Theory & Activation Energy

Catalysts

Endothermic and exothermic reactions

Measuring temperature change

Bond energies

Intermolecular forces of attraction

Saturated Hydrocarbons

Unsaturated Hydrocarbons

Pollutants

Cracking & Alkenes

The Atmosphere

Greenhouse Gases

Climate change

Explore Edexcel GCSE Chemistry Model Answers by Topics

Ionic bonding

Ionic Compounds

Covalent bonding

Simple molecular structures

Giant covalent structures

Diamond

Graphite

Graphene & Fullerenes

Metallic bonding

States of Matter

Simple and Fractional Distillation

Filtration & Crystallisation

Chromatography

Water treatment

Acids and alkalis

Investigating neutralisation reactions

Show more

Metallic bonding

States of Matter

Simple and Fractional Distillation

Filtration & Crystallisation

Chromatography

Water treatment

Acids and alkalis

Investigating neutralisation reactions

Strong & Weak Acids

Reactions of acids

Making insoluble salts

Making soluble salts

The Reactivity Series

Reactivity of metals

Displacement reactions

Extracting metals using carbon

The Process of Electrolysis

Electrolysis to extract metals

Biological methods to extract metals

Recycling

Life cycle assessments

Dynamic equilibrium

Le Chatelier’s Principle: Changing Concentration

Calculation with gases

Percentage yield

Atom economy

Choosing a reaction pathway

Typical Properties of Transition Metals

Alloys as Useful Materials

Corrosion & Its Prevention

The Haber Process

Fertilisers

Fuel cells

Group 1 – Alkali metals

Group 7 – Halogens

Halogen displacement reactions

Group 0 - Noble Gases

Rates of reaction

Factors that Affect the Rate of Reaction

Rate experiments involving precipitation

Calculating Rates of Reactions

Collision Theory & Activation Energy

Catalysts

Endothermic and exothermic reactions

Measuring temperature change

Bond energies

Intermolecular forces of attraction

Saturated Hydrocarbons

Unsaturated Hydrocarbons

Pollutants

Cracking & Alkenes

The Atmosphere

Greenhouse Gases

Climate change

Explore Edexcel GCSE Chemistry Quizzes by Topics

Ionic bonding

Ionic Compounds

Covalent bonding

Simple molecular structures

Giant covalent structures

Diamond

Graphite

Graphene & Fullerenes

Metallic bonding

States of Matter

Simple and Fractional Distillation

Filtration & Crystallisation

Chromatography

Water treatment

Acids and alkalis

Investigating neutralisation reactions

Show more

Metallic bonding

States of Matter

Simple and Fractional Distillation

Filtration & Crystallisation

Chromatography

Water treatment

Acids and alkalis

Investigating neutralisation reactions

Strong & Weak Acids

Reactions of acids

Making insoluble salts

Making soluble salts

The Reactivity Series

Reactivity of metals

Displacement reactions

Extracting metals using carbon

The Process of Electrolysis

Electrolysis to extract metals

Biological methods to extract metals

Recycling

Life cycle assessments

Dynamic equilibrium

Le Chatelier’s Principle: Changing Concentration

Calculation with gases

Percentage yield

Atom economy

Choosing a reaction pathway

Typical Properties of Transition Metals

Alloys as Useful Materials

Corrosion & Its Prevention

The Haber Process

Fertilisers

Fuel cells

Group 1 – Alkali metals

Group 7 – Halogens

Halogen displacement reactions

Group 0 - Noble Gases

Rates of reaction

Factors that Affect the Rate of Reaction

Rate experiments involving precipitation

Calculating Rates of Reactions

Collision Theory & Activation Energy

Catalysts

Endothermic and exothermic reactions

Measuring temperature change

Bond energies

Intermolecular forces of attraction

Saturated Hydrocarbons

Unsaturated Hydrocarbons

Pollutants

Cracking & Alkenes

The Atmosphere

Greenhouse Gases

Climate change

Explore Edexcel GCSE Chemistry Exam Questions by Topics

Ionic bonding

Ionic Compounds

Covalent bonding

Simple molecular structures

Giant covalent structures

Diamond

Graphite

Graphene & Fullerenes

Metallic bonding

States of Matter

Simple and Fractional Distillation

Filtration & Crystallisation

Chromatography

Water treatment

Acids and alkalis

Investigating neutralisation reactions

Show more

Metallic bonding

States of Matter

Simple and Fractional Distillation

Filtration & Crystallisation

Chromatography

Water treatment

Acids and alkalis

Investigating neutralisation reactions

Strong & Weak Acids

Reactions of acids

Making insoluble salts

Making soluble salts

The Reactivity Series

Reactivity of metals

Displacement reactions

Extracting metals using carbon

The Process of Electrolysis

Electrolysis to extract metals

Biological methods to extract metals

Recycling

Life cycle assessments

Dynamic equilibrium

Le Chatelier’s Principle: Changing Concentration

Calculation with gases

Percentage yield

Atom economy

Choosing a reaction pathway

Typical Properties of Transition Metals

Alloys as Useful Materials

Corrosion & Its Prevention

The Haber Process

Fertilisers

Fuel cells

Group 1 – Alkali metals

Group 7 – Halogens

Halogen displacement reactions

Group 0 - Noble Gases

Rates of reaction

Factors that Affect the Rate of Reaction

Rate experiments involving precipitation

Calculating Rates of Reactions

Collision Theory & Activation Energy

Catalysts

Endothermic and exothermic reactions

Measuring temperature change

Bond energies

Intermolecular forces of attraction

Saturated Hydrocarbons

Unsaturated Hydrocarbons

Pollutants

Cracking & Alkenes

The Atmosphere

Greenhouse Gases

Climate change

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