Ionic equations: salt formation
I can write balanced ionic equations for the formations of salts, including the ionic equation for water formation (neutralisation) and state symbols.
Ionic equations: salt formation
I can write balanced ionic equations for the formations of salts, including the ionic equation for water formation (neutralisation) and state symbols.
Lesson details
Key learning points
- A chemical equation is used to represent the chemical reaction that occurs during the formation of a compound.
- Ionic equations can be used to show only the chemical species that are changing within a reaction.
- State symbols (s), (l), (g) and (aq), are used in ionic equations to show which substances change.
- The ionic equation for water formation (neutralisation) is H⁺(aq) + OH⁻(aq) → H2O(l).
Common misconception
Ionic equations only include ions involved in the reaction, not all ions in the reaction mixture.
Stress the difference between reacting ions and spectator ions.
Keywords
State symbol - used in chemical equations to indicate the physical state of a substance
Ionic equation - a balanced equation showing all the ions involved in a reaction
Spectator ion - ions not involved in a chemical reaction
Oxidation - a type of reaction in which a substance gains oxygen or loses electrons
Reduction - a type of reaction in which a substance loses oxygen or gains electrons
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
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Starter quiz
6 Questions
-ate compounds -
name ending for a compound with 3 or more elements, one being oxygen
-ide compounds -
name ending for a compound with a metal and singular non–metal
molecular formula -
shows the actual number of atoms of each element in a compound
symbol equation -
equations using chemical formulae and state symbols