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Listed under:  Science  >  Matter  >  Chemical reactions
Collection

VisChem topic1: chemical bonding in pure substances in different states

This web page contains a collection of animations depicting copper, sodium chloride, water and oxygen at the molecular level. The animations show the arrangement of atoms, molecules and ions in solid, liquid and gaseous states as well as illustrating changes of state. Two animations demonstrate alternative methods of representing ...

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VisChem topic 4: energy in chemical reactions

This web page contains a video and animations exploring the distribution of molecular kinetic energy in solid, liquid and gaseous water, as well as the changes in chemical energy during reactions. Four animations depict the reaction mechanisms and energy profiles involved in organic substitution reactions.

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VisChem topic 5: factors affecting the rates of chemical reactions

This website contains seven animations depicting the factors that influence rates of organic chemical reactions. Three animations explore the significance of collision orientation, two the role of activation energy and two the effects of different solvents.

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VisChem topic 9: physical properties of water

This web page contains a video, animations and a student worksheet exploring the influence of structure and bonding on the physical properties of water. Two animations showing structure and bonding in oxygen are provided for comparison.

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VisChem topic 2: dissolution of an ionic salt

This web page contains a video clip, animations and student worksheets exploring the dissolving of ionic solids in water. The video clip has both filmed and animated scenes that compare the dissolving of sodium chloride with melting and show how the dissolving process can be represented by chemical equations. Important ...

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VisChem topic 3: precipitation of an ionic salt

This web page contains a video clip, animations and student worksheets exploring the precipitation of silver chloride. The video has both filmed and animated scenes showing the process at observational and molecular levels. It explains how the reaction can be represented by a chemical equation.

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VisChem topic 6: molecular structure, shape and polarity

This web page contains ten animations of molecules and compound ions as well as nine QTVR objects showing organic molecules. The animations rotate the molecules to show their structure fully. The QTVR objects can be manipulated by the user so that, as well as being rotated, different ways of modelling the molecules can be seen.

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VisChem topic 8: chemical properties of water and aqueous solutions

This web page contains video clips, animations and student worksheets that investigate the chemical properties of water and aqueous solutions. The major topics cover the structure and bonding of water, acids and bases, dissolving, ionic solutions, precipitation and complexation.

Moving Image

Chemical catalysts

Have you ever heard of a catalyst? Watch as the Surfing Scientist, Ruben Meerman, demonstrates the power of a catalyst. He adds one to just two other ingredients to create a chemical reaction with spectacular foaming results - just like elephant toothpaste!

Interactive resource

Chemical reactions

Investigate chemical reactions at a molecular level. Break apart molecules of two substances into their component atoms and rearrange them to make molecules of new substances. For example, explore how methane burns in oxygen to produce carbon dioxide and water. Work out the number of molecules each substance needed to balance ...

Interactive resource

Chemical reactions: combustion

Investigate chemical reactions at a molecular level. Break apart molecules of oxygen and another substance into their component atoms and rearrange them to make molecules of new substances. For example, explore how methane burns in oxygen to produce carbon dioxide and water. Work out the number of molecules of each substance ...

Interactive resource

Chemical reactions: non-combustion

Investigate chemical reactions at a molecular level. Break apart molecules of two substances into their component atoms and rearrange them to make molecules of new substances. For example, explore how sulfur reacts with hydrogen to produce hydrogen sulfide. Work out the number of molecules of each substance needed to balance ...

Interactive resource

Chemical reactions: balancing equations

Investigate chemical reactions at a molecular level. Balance chemical equations. For example, explore how nitrogen combines with hydrogen to produce ammonia. Work out the number of molecules of each substance needed to balance the chemical equation. This learning object is one in a series of six objects. The series is also ...

Interactive resource

Chemical reactions: energy

Investigate chemical reactions at a molecular level. Break apart molecules of two substances into their component atoms and rearrange them to make molecules of new substances. For example, explore how nitric oxide combines with oxygen to produce nitrogen dioxide. Work out the number of molecules of each substance needed ...

Interactive resource

Chemical reactions: energy released by fuel

Investigate chemical reactions at a molecular level. Break apart molecules of oxygen and a fuel into their component atoms and rearrange them to make molecules of new substances. For example, explore how glucose burns in oxygen to produce carbon dioxide and water. Work out the number of molecules of each substance needed ...

Interactive resource

Chemical reactions: reaction reshuffles

Investigate chemical reactions at a molecular level. Examine collisions between molecules of two reactants. Adjust the ratios of the reactants and compare the outcomes. Identify the number of molecules involved in a balanced reaction. For example, two A molecules combine with a B2 molecule to form a molecule of A2B2. This ...

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VisChem topic 7: intermolecular forces

This web page contains animations demonstrating situations in which dispersion forces, ion-dipole forces and hydrogen bonding occur. Several animations show hydrated ions, and the effect of hydration on dissolving and reaction rates is discussed in explanatory text. A document containing lesson plans and student worksheets ...

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VisChem topic 10: reactions of carbon compounds

This web page contains animations showing reaction mechanisms for organic substitution, addition and elimination reactions. For most reactions there are two animations, one showing molecular models, and the other showing structural formulas with movement of electrons as bonds are rearranged.

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VisChem topic 11: dynamic chemical equilibrium

This web page contains a video, animations and a student worksheet investigating the dynamic equilibrium associated with the iron(III) thiocyanate complex. The animations show important molecular-level segments from the video.

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VisChem topic 13: redox reactions

This web page contains a video, animations and a student worksheet investigating the redox reaction between copper metal and silver ions. The animations show important molecular-level segments from the video.