Starter quiz
- What is the chemical name for the salt CaCl?
- calcium carbonate
- calcium chloride ✓
- calcium hydroxide
- calcium oxide
- calcium sulfate
-
- Match the following key terms to their definitions.
- -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 ✓
- Which of the following are examples of salts with names ending with -ide?
- CaCl ✓
- CaCO
- CaSO
- CaO ✓
-
- Which of the following are examples of salts with names ending with -ate?
- CaCl
- CO
- CaSO ✓
- CaO
- CaCO ✓
-
- What types of salts are formed when sulfuric acid reacts with a metal oxide?
- a metal carbonate
- a metal nitrate
- a metal sulfide
- a metal sulfate ✓
-
- What types of salts are formed when hydrochloric acid reacts with a metal oxide?
- a metal chlorate
- a metal chloride ✓
- a metal hydrogen chlorate
- a metal hydrogen chloride
-
Exit quiz
- What does the subscript number 4 in HSO represent?
- 4 molecules of sulfuric acid
- 4 atoms of sulfur and 4 atoms of oxygen
- 4 atoms of oxygen ✓
- 4 atoms of sulfur
-
- 5Al(SO) is written down as part of a balanced chemical equation. Which number is the coefficient?
- the 2
- the 3
- the 4
- the 5 ✓
-
- Potassium iodide can be represented as KI in a chemical equation. What does tell us about the potassium iodide?
- It is water.
- It contains water.
- It can dissolve in water.
- It is dissolved in water. ✓
-
- In a solution there may be several types of ions, of which some react together and others do not. What is the name of the ions that stay in solution and do not react?
- dissolved ions
- observer ions
- passive ions
- spectator ions ✓
-
- What is the correct ionic equation for the formation of barium sulfate?
- barium chloride + sodium sulfate → barium sulfate + sodium chloride
- BaCl₂ (aq) + Na₂SO₄ (aq) → BaSO₄ (s) + 2NaCl (aq)
- Ba²⁺(aq)+2Cl⁻(aq)+2Na⁺(aq)+SO₄²⁻(aq) → Ba²⁺(aq)+SO₄²⁻(aq)+2Na⁺(aq)+2Cl⁻(aq)
- Ba²⁺ (aq) + SO₄²⁻ (aq) → BaSO₄ (s) ✓
- H⁺ (aq) + OH⁻ (aq) → H₂O (l)
-
- Which ions react in the neutralisation reaction between sulfuric acid and potassium hydroxide?
- hydrogen ions, H ✓
- hydroxide ions, OH ✓
- potassium ions, K
- sulfate ions, SO
-
Worksheet
Loading worksheet ...
Presentation
Loading presentation ...
Video
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
+