Secondary Catalogue

Chemistry


The pH Scale

The pH Scale

Shedding Light on Acids and Bases

In the fourth episode of this series, we take an in-depth look at H⁺ and OH⁻ ions and we explain how the pH scale is used to express how strongly acidic or how strongly basic a particular environment is. We examine how the pH of natural...Show More
Neutralisation

Neutralisation

Shedding Light on Acids and Bases

In the third episode, Neutralisation, we explain what bases are and then take a look at what happens when acids and bases chemically react. We also take a look at acid-base indicators, which are chemicals that change colour depending on whether...Show More
Acids and Carbonates

Acids and Carbonates

Shedding Light on Acids and Bases

In this episode, we describe what carbonates are and explain how they react with acids. If it wasn't for carbonates, our own stomach acid would kill us, acid rain would have destroyed our forests, and—worst of all—our pancakes wouldn't be as...Show More
Acids in Industry

Acids in Industry

Shedding Light on Acids and Bases

In Acids in Industry, we look at what acids are, how they're made, and how they're used in steel making and agriculture. We also take a quick trip back to the 1770s to look at how acids were used by Captain James Cook to save his crew from the...Show More
The Chemical Properties of Elements

The Chemical Properties of Elements

Chemistry: Senior Secondary

If movies have taught us anything, it's that the first person to enter a spooky cave is the first to get in trouble! Will First Mate Phil survive to see the light of day? This lesson will shine a light on the chemical properties of metals,...Show More
Naming Covalent Substances

Naming Covalent Substances

Chemistry: Senior Secondary

This lesson will discuss the rules for writing the names and chemical formulae of covalent molecules and covalent networks.
The Physical Properties of Elements

The Physical Properties of Elements

Chemistry: Senior Secondary

The pirates are off to find more treasure! Will they make it across the stormy seas? This lesson will survey the physical properties of metals, non-metals and metalloids.
Naming Binary Ionic Compounds

Naming Binary Ionic Compounds

Chemistry: Senior Secondary

This lesson will reveal the rules for writing the names and chemical formulae of ionic compounds, by balancing charges and using the cross method.
Naming Hydrated Salts

Naming Hydrated Salts

Chemistry: Senior Secondary

This lesson will explain the differences between hydrated and anhydrous salts, including how to write their names and chemical formulae.
Naming Polyatomic Ions

Naming Polyatomic Ions

Chemistry: Senior Secondary

This lesson will uncover the rules for writing the names and chemical formulae of polyatomic ions and ionic compounds.
Naming Monoatomic Ions

Naming Monoatomic Ions

Chemistry: Senior Secondary

This lesson will introduce the rules for writing the names and chemical formulae of non-metal anions and metal cations, including metals with multiple positive oxidation states.
Mixtures: Tailings Dam Disaster

Mixtures: Tailings Dam Disaster

Introducing Elements, Compounds and Mixtures

The products of mining—metals, minerals, and fuels—are essential to our everyday lives. But the waste by-products from mining processes, called tailings, can be highly toxic. Using the 2014 Mount Polley Mine tailings dam and its catastrophic...Show More
Compounds: Death of a President

Compounds: Death of a President

Introducing Elements, Compounds and Mixtures

From water to table salt, we safely come into contact with countless chemical compounds every day. But compounds can also be deadly. Using Turkish President Turgut Özal’s death and eventual autopsy as real-life context, this video examines the...Show More
Elements: The Hanover Poisoning

Elements: The Hanover Poisoning

Introducing Elements, Compounds and Mixtures

A poisoned umbrella and a forensic investigation … using an unusual and as-yet-unsolved true crime as a launching place, this video shows that the chemistry of matter matters. Elements, as represented on the periodic table, are made up of only...Show More
Gravimetric Analysis: Part 2

Gravimetric Analysis: Part 2

Chemistry: Senior Secondary

Long Jane Silver and Senor Ortega analysed the soil sample and saved the cocoa trees! But something's not right... Did they perform the wrong steps? Was their sample contaminated? This lesson will assess the accuracy, reliability and validity of...Show More
The Periodic Table

The Periodic Table

Chemistry: Senior Secondary

Long Jane Silver buys an antique table, despite an old sailor's warning that it is haunted! Is she ready to discover what lies waiting inside? This lesson will introduce the periodic table of elements and explain how it is organised.
Weird Wonderful Water

Weird Wonderful Water

Life in the Sea

This programme is about seawater. It is the most important liquid on Earth, not only from its sheer volume, but also because it has remarkable qualities. A few of them, like buoyancy, are common to all liquids - but seawater is also the cradle of...Show More
Newton's Third Law of Motion and Gravitation

Newton's Third Law of Motion and Gravitation

Motion and Its Applications

Newton’s Third Law of Motion states that to every action there is an equal and opposite reaction. Newton’s Universal Law of Gravitation is equivalent to his Third Law of Motion in the sense that any two objects in the universe attract each...Show More
The Modern Periodic Table

The Modern Periodic Table

Periodic Classification of Elements

The elements in the Periodic Table are roughly divided into metals, metalloids and non - metals. There are seven periods in the Periodic Table. The vertical columns in a Periodic Table are called groups and there are 18 groups in the Periodic Table.
Rusting and Its Prevention

Rusting and Its Prevention

Physical and Chemical Changes

Rusting damages things made of iron, making the structures weak. Rusting can be prevented by the use of some methods.
Solids

Solids

Matter in Our Surroundings

Solid is that state of matter which retains a fixed shape and volume. The particles in solids are closely packed and hence the interparticle forces are the strongest in it. Solids cannot be compressed and posses rigidity.
Characteristics of Groups: Valence Electrons and Valency

Characteristics of Groups: Valence Electrons and Valency

Periodic Classification of Elements

The groups in the Periodic Table are arranged vertically. There are 18 groups in the Periodic Table. All the elements in one group have the same electronic configuration and hence the same number of valence electrons and the same valency.
Characteristics of Groups: Chemical Reactivity and Nature of Oxides

Characteristics of Groups: Chemical Reactivity and Nature of Oxides

Periodic Classification of Elements

The chemical reactivity of metals increases from the top to the bottom in a group, while the chemical reactivity of non-metals decreases as we move down in the group. On moving down in a group of the Periodic Table, there is no change in the...Show More
Combination Reaction

Combination Reaction

Physical and Chemical Changes

A combination reaction is a reaction, in which two or more elements or compounds combine together to form a single compound. For example, magnesium burns completely on heating, leaving behind a powdery white ash of magnesium oxide.
Physical Properties of Metals

Physical Properties of Metals

Metals and Non-metals

Metals are generally solid, hard and strong, have a metallic lustre and high melting and boiling points. Metals are also malleable, ductile, and good conductors of heat and electricity.