Starter quiz
- What is an ionic compound?
- A substance made of molecules with covalent bonds.
- A substance composed of positively and negatively charged ions. ✓
- A type of metal that is highly conductive.
- A compound formed by sharing electrons equally.
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- What is solubility?
- The ability of a substance to dissolve in a solvent. ✓
- The ability of a substance to conduct electricity.
- The measure of a substance's density.
- The temperature at which a substance melts.
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- What does the periodic table display?
- The properties of chemical reactions.
- An arrangement of elements by their atomic number. ✓
- The states of matter of various substances.
- The list of all known compounds.
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- What is a chemical reaction?
- A change in state from solid to liquid.
- A change in colour without forming new substances.
- A process where substances combine or break apart to form new substances. ✓
- A physical change in the shape of an object.
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- What are physical properties?
- Characteristics observed during a chemical reaction.
- Properties that only appear in solution.
- Traits that describe the reactivity of a substance.
- Features of a substance that can be measured. ✓
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- What is a mixture?
- A substance with a fixed composition that can't be separated into its components
- A combination of two or more substances that are not chemically bonded. ✓
- A type of chemical reaction producing a new substance.
- A single pure substance with uniform properties.
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Exit quiz
- What is solubility?
- The ability of a substance to dissolve in a solvent. ✓
- The speed at which a substance dissolves.
- The ability of a substance to conduct electricity.
- The temperature at which a substance melts.
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- What is a precipitate?
- A gas that dissolves in water.
- A substance that evaporates from a liquid.
- A solid that forms and settles out of a liquid mixture. ✓
- A chemical that accelerates a reaction.
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- Which ionic compounds are generally soluble?
- All compounds containing metals.
- Most chlorides, sulfates, and nitrates. ✓
- Most oxides, hydroxides, and carbonates.
- All ionic compounds are soluble
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- What is an exception to the solubility of chlorides?
- sodium chloride
- lead (II) chloride ✓
- potassium chloride
- ammonium chloride
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- What is a precipitation reaction?
- A reaction where a gas is formed.
- A reaction where two soluble salts form an insoluble solid. ✓
- A reaction where two liquids combine to form water.
- A reaction where energy is released as light.
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- How can solubility rules help in predicting reactions?
- They help predict the speed of reactions.
- They help predict which compounds will dissolve or form a precipitate. ✓
- They help predict whether a gas will be formed.
- They help determine the energy released in a reaction.
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Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- There are a list of general rules which describe the solubility of common types of substances in water.
- Reactions that form insoluble products are called precipitation reactions; the solids formed are called the precipitate.
- When two soluble salts are mixed together, sometimes they will rearrange to create an insoluble salt.
- Solubility rules can be used to identify which two solutions are needed to mix in order to create an insoluble salt.
Common misconception
All salts are either completely soluble or completely insoluble in water.
Not all salts follow a strict 'soluble' or 'insoluble' rule. Some salts have limited solubility, meaning they dissolve only to a certain extent. Solubility rules help us predict the solubility of common salts, but there are always exceptions.
Keywords
Solubility - The ability of a substance to dissolve in a particular solvent creating a solution; how well a solute dissolves in a solvent.
Salt - An ionic compound, usually formed by neutralisation of an acid by a base.
Soluble - When a substance dissolves in a liquid, it is described as soluble in that liquid.
Precipitate - An insoluble solid formed when two solutions react together.
Insoluble - When a substance does not dissolve in a liquid, it is described as insoluble in that liquid.
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