Acids and Bases Flashcards
Arrhenius Theory
An acid is a substance that ionises in water to produce hydrogen ions.
A base is a substance that dissociates in water to produce hydroxide ions.
Bronsted-Lowry Theory
An acid is a proton (H+) donor.
A base is a proton (H+) acceptor.
Strong acids
An acid that ionises completely in aqueous solution
Strong base
A base that dissociates completely in aqueous solution
Weak acid
An acid that only ionises partially in an aqueous solution
Weak base
A base that only dissociates/ionises partially in an aqueous solution
Concentrated Acid
A large amount of solute dissolved in a small amount of water
Dilute Acid
A small amount of solute dissolved in a large amount of water
Salt
A substance in which the hydrogen of an acid has been replaced by a cation
Neutralisation
The point where an acid and base have reacted so neither is in excess. Also called the equivalence point.
Indicators
A substance that changes colour depending on the pH of the solution
Solution
A homogenous mixture of solute and solvent
Standard solution
A solution of known concentration and it will remain constant for a while
Amphoteric/Amphiprotic substance
A substance that can act as either an acid or base.
pH
A number that indicates the degree of the acidity of a solution