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Reactions of acids key terms
Study Reactions of acids with curriculum-aligned Key Terms resources, practice links, and exam-focused support.
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key terms
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Reactions of acids
Key terms
ionic equation
A chemical equation that shows the ions involved in a reaction, particularly in acid-base neutralisation.
neutralisation
The reaction between an acid and a base that produces salt and water. In The pH scale and neutralisation, this term helps explain write the ionic equation H+ + OH- -> H2O for neutralisation for AQA GCSE Chemistry 8462 Unit 4.4.
pH
A measure of the acidity or alkalinity of a solution, on a scale from 0 to 14. In The pH scale and neutralisation, this term helps explain explain why pH increases when an acid is neutralised by an alkali for AQA GCSE Chemistry 8462 Unit 4.4.
neutralisation
The chemical reaction between an acid and a base or alkali, resulting in the formation of salt and water.
pH
A measure of the acidity or alkalinity of a solution, where lower values indicate higher acidity.
neutralisation
The chemical reaction between an acid and a base or alkali, resulting in the formation of water and a salt.
pH scale
A numerical scale used to specify the acidity or alkalinity of a solution, ranging from 0 (acidic) to 14 (alkaline), with 7 being neutral.
acidic solution
A solution with a pH less than 7, indicating a higher concentration of hydrogen ions (H+).
strong acid
An acid that is completely ionised in aqueous solution. In Strong and weak acids (HT only), this term helps explain (HT only) Describe a strong acid as completely ionised in aqueous solution for AQA GCSE Chemistry 8462 Unit 4.4.
aqueous solution
A solution in which water is the solvent. In Strong and weak acids (HT only), this term helps explain (HT only) Describe a strong acid as completely ionised in aqueous solution for AQA GCSE Chemistry 8462 Unit 4.4.
weak acid
An acid that is only partially ionised in aqueous solution. In Strong and weak acids (HT only), this term helps explain (HT only) Describe a weak acid as only partially ionised in aqueous solution for AQA GCSE Chemistry 8462 Unit 4.4.
partial ionisation
The process by which only some molecules of a weak acid dissociate into ions in water.
Ionisation
The process by which an acid dissociates into ions in solution. In Strong and weak acids (HT only), this term helps explain (HT only) Explain that acids of the same concentration can have different pH values because of different degrees of ionisation for AQA GCSE Chemistry 8462 Unit 4.4.
pH value
A measure of the acidity or alkalinity of a solution, determined by the concentration of hydrogen ions.
pH
A measure of the acidity or alkalinity of a solution, where lower values indicate higher hydrogen ion concentration.
hydrogen ion concentration
The amount of hydrogen ions (H+) present in a solution, which determines its acidity and is inversely related to pH.
pH
A measure of the acidity or alkalinity of a solution, where lower values indicate higher hydrogen ion concentration.
hydrogen ion concentration
The amount of hydrogen ions (H+) present in a solution, which determines its acidity.
Acid strength
The extent to which an acid dissociates into hydrogen ions in aqueous solution, independent of its concentration.
Acid concentration
The amount of acid present in a given volume of solution, typically expressed as molarity (mol L⁻¹).
pH
A logarithmic scale that quantifies the hydrogen ion concentration in a solution, where lower values indicate higher acidity.
Dilution
The process of reducing the concentration of a solution by adding solvent, which can alter the pH depending on acid strength.
hydrogen ion concentration
The amount of hydrogen ions (H+) present in a solution, which determines its acidity.
pH scale
A logarithmic scale used to measure the acidity or alkalinity of a solution, ranging from 0 (acidic) to 14 (alkaline).
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