A charged particle formed when an atom or molecule gains or loses electrons.

An equation that shows only the ions and molecules directly involved in a chemical reaction, excluding spectator ions.

An ion that remains unchanged during a chemical reaction and does not participate in the formation of the product.

Any chemical entity, such as atoms, ions, or molecules involved in a chemical process.

An incorrect test result indicating the presence of a substance or condition that is actually absent.

Ionic equations: aqueous ion tests

Chemistry

Instrumental analysis and flame tests: including barium

Chemical tests: aqueous ions

Identifying unknown substances (including barium)

In the Groups of the Periodic Table unit, pupils learned about the properties and reactivity of elements in the same group.

This unit covers tests to identify aqueous cations and anions, including flame tests for metal ions like lithium, sodium, and copper. It explains the benefits of instrumental analysis, such as sensitivity and accuracy, and focuses on interpreting results from charts, tables, and spectroscopy data.

Chemical analysis

An ion that does not participate in the chemical reaction and remains unchanged.

An ion that participates in the reaction and changes.

What must be conserved in a balanced ionic equation?

What is the first step in writing an ionic equation?

Ba²⁺(aq) + SO₄²⁻(aq) → BaSO₄(s) 

BaCl₂(aq) + Na₂SO₄(aq) → BaSO₄(s) + 2NaCl(aq)

What is the net ionic equation for the reaction: BaCl₂(aq) + Na₂SO₄(aq) → BaSO₄(s) + NaCl(aq)

2AgNO₃(aq) + 2NaCl(aq) → 2AgCl(s) + 2NaNO₃(aq)

What is the net ionic equation for the reaction: AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq)

What must be included when balancing ionic equations?

What is required for an atom to become an ion?

They dissociate into their constituent ions.

What happens to ionic compounds when they dissolve in water?

Ensure the same number of each type of atom on both sides. 

Which of the following is a common cation?

Ionic equations: aqueous ion tests

Lesson outcome