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ScotlandChemistry

Area 1: Chemical Changes and Structure

6 dot points across 6 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

What makes a solution acidic or alkaline, and what happens when they react?

Acids and bases: the pH scale and the effect of dilution, forming acids and alkalis from oxides, neutralisation and naming salts, spectator ions, and titration calculations.
An SQA National 5 Chemistry answer on acids and bases, covering the pH scale and dilution, how non-metal and metal oxides form acids and alkalis, neutralisation and naming salts, spectator ions, and titration calculations using the mole.
12 min answer →

What is an atom made of, and how do we describe its particles?

Atomic structure: protons, neutrons and electrons; atomic number and mass number; electron arrangement of the first 20 elements; isotopes and relative atomic mass.
An SQA National 5 Chemistry answer on atomic structure, covering protons, neutrons and electrons, atomic number and mass number, electron arrangements of the first 20 elements, isotopes, and how relative atomic mass is a weighted average of isotope masses.
10 min answer →

How does the bonding and structure of a material explain its properties?

Bonding and properties: covalent bonding (molecular and network), ionic bonding, and how each structure explains melting point, conductivity and solubility.
An SQA National 5 Chemistry answer on bonding and properties, covering covalent molecular, covalent network and ionic substances, how each forms, and how the structure explains melting point, electrical conductivity and solubility.
11 min answer →

How do the key areas of Area 1 fit together into the quantitative and structural core of the course?

Overview of Area 1 Chemical Changes and Structure: how rates of reaction, atomic structure, bonding and properties, formulae and reacting quantities, and acids and bases connect.
An SQA National 5 Chemistry overview of Area 1 Chemical Changes and Structure, linking rates of reaction, atomic structure, bonding and properties, formulae and reacting quantities, and acids and bases into the quantitative and structural core of the course.
9 min answer →

How do we write formulae and work out the quantities that react?

Formulae and reacting quantities: chemical formulae using valency and the data booklet, balanced equations with state symbols, the mole and gram formula mass, and concentration of solutions.
An SQA National 5 Chemistry answer on formulae and reacting quantities, covering writing chemical formulae from valency and the data booklet, balancing equations with state symbols, the mole and gram formula mass, and calculating the concentration of a solution.
12 min answer →

What controls how fast a chemical reaction goes, and how do we measure it?

Rates of reaction: following the course of a reaction, calculating average rate, and explaining the effects of concentration, particle size, temperature and catalysts using the idea of collisions.
An SQA National 5 Chemistry answer on rates of reaction, covering how a reaction is followed, calculating average rate from data, reading rate graphs, and explaining the effects of concentration, particle size, temperature and catalysts in terms of collisions.
11 min answer →