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Listed under:  Science  >  Matter  >  Chemical reactions  >  Bonding (Chemistry)
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 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.

Collection

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.

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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 ...

Collection

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.

Collection

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 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 14: structure and properties of carbon compounds

This web page contains QTVR objects showing aspects of the structure of selected organic molecules. 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.

Image

Water molecule showing polarity

This is a colour graphic representation of a water molecule. It depicts the structural formula of water superimposed on a space-filling model and an electron-density isosurface. The diagram is colour-coded to show the dipole nature of the molecule.

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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 12: acid-base reactions

This web page contains a video, animations and a student worksheet examining the proton-transfer reactions of acids and bases. Self-ionisation of water, acidity of hydrated metal ions, proton gain by ammonia molecules and proton loss from acetic acid are depicted. The animations show important molecular-level segments from ...

Collection

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.

Teacher resource

Chemical reactions and organic compounds: learning sequence

In this structured sequence of learning, there are five teaching and learning sessions that include example stimulus questions, images, interactive simulations, video footage and experiments. Chemical reactions and some formulas of organic compounds are introduced to students. Activities investigate chemical bonds and the ...

Image

Water molecule

This is a colour image of a model of a molecule of water, H₂O. In this model, atoms are represented by coloured spheres held together by grey rods, representing covalent bonds. The water molecule contains one oxygen atom (the red sphere) and two hydrogen atoms (the grey-white spheres).

Image

Hydrogen peroxide molecule

This is a colour image of a model of a molecule of hydrogen peroxide, H₂O₂. In this model, atoms are represented by coloured spheres held together by grey rods, representing covalent bonds. The hydrogen peroxide molecule consists of two oxygen atoms (the red spheres) and two hydrogen atoms (the grey-white spheres).

Image

Hydrogen sulfide molecule

This is a colour image of a model of a molecule of hydrogen sulfide, H₂S. In this model, atoms are represented by coloured spheres held together by grey rods, representing covalent bonds. The hydrogen sulfide molecule consists of one sulfur atom (the yellow sphere) and two hydrogen atoms (the grey-white spheres).

Image

Disulfane molecule

This is a colour image of a model of a molecule of disulfane, H₂S₂. In this model, atoms are represented by coloured spheres held together by grey rods, representing covalent bonds. The disulfane molecule consists of two sulfur atoms (the yellow spheres) and two hydrogen atoms (the grey-white spheres).

Image

Trisulfane molecule

This is a colour image of a model of a molecule of trisulfane, H₂S₃. In this model, atoms are represented by coloured spheres held together by grey rods, representing covalent bonds. The trisulfane molecule consists of three sulfur atoms (the yellow spheres) and two hydrogen atoms (the grey-white spheres).

Image

Ammonia molecule

This is a colour image of a model of a molecule of ammonia, NH₃. In this model, atoms are represented by coloured spheres held together by grey rods, representing covalent bonds. The ammonia molecule consists of one nitrogen atom (the blue sphere) and three hydrogen atoms (the grey-white spheres).