Chemistry: Lesson 8 Acids, Bases And Buffers

Front 1

Define the term Hydronium ion

Back 1

The H₃O⁺ ion (combination of H⁺ ion and H₂O molecule)

Front 2

Define the term Arrhenius acid-base theory

Back 2

Acid - substance that produces H₃O⁺ ions in aqueous solution;

Base - substance that produces OH⁻ ions in aqueous solution.

Front 3

Define the term Bronsted Lowry acid-base theory

Back 3

An acid is a proton donor

A base is a proton acceptor

Front 4

Define the term pH

Back 4

pH is the general measure of acidity (the power of Hydrogen)

Front 5

Define the term Acid

Back 5

Substances which produce H⁺ ions when they dissolve in water.

Front 6

Define the term Base

Back 6

Substances which produce OH⁻ ions in aqueous solutions.

Front 7

Define the term Buffer

Back 7

A buffer is an amphoteric substance that mops up excess H⁺ or OH⁻ ions in solutions. They are very important in maintaining pH homeostasis (defend against fluctuations in pH).

Front 8

Define the term Salt

Back 8

Substances which when dissolved produce cations and anions neither of which are H⁺ nor OH⁻.

Front 9

Define the term Amphoteric

Back 9

Compounds that can act as either acids or bases

Front 10

Define the term Neutralisation Reaction

Back 10

A chemical reaction when an acid and a base interact to form a salt.