Equilibrium Graphs
We look at graphs of concentration vs time and rate vs time for the Haber process. Consideration of the value of the equilibrium constant as changes are made to the system at equilibrium are included.
Oct 21, 2016•5 min
chemistry - meaghersclasses
These chemistry video podcasts are high school chemistry snippets, from Mt Lawley Senior High School. Check out my YouTube channel https://www.youtube.com/channel/UCDK3TYmYcgTfjrkQ_t_2tCQ
To help make these resources more useful your feedback would be appreciated.
You may also want to check out my physics video podcasts at www.meaghersphysics.podomatic.com.
Thanks,
Richard.
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Episodes
Equilibrium Constant Values
In this episode we consider some values of an equilibrium, and show that even if the raw ratio of reactants to products is reversed when a chemical equilibrium is reestablished the value of the equilibrium constant remains unchanged, so long as the temperature remains constant.
Oct 20, 2016•4 min
Equilibrium
This chemistry video podcast looks at the concept of equilibrium as it applies to chemical systems. (It is an old,ie 2006, episode that I inadvertently deleted when trying to get rid of spam comments!) I really must publish more up to date episodes!! I do intend to get more episodes out this year, along with an epub book on intro chem. Richard
Jan 03, 2011•5 min
Mindocular and the opposing forces (video) jan 15th 2009
This chemistry video podcast looks at electrostatic forces and how they are responsible for holding solids together. All four fundamental forces (ie strong, weak, gravitational and electrostatic) are considered. "Mindocular' is a fictional character who has a 'minds eye' with excellent magnification and resolution and can 'see' individual particles in matter, and determine their behaviour. He looks at metallic, ionic and covalent solids.
Jan 15, 2009•5 min
reactivity of alcohols (video) nov 11th 2008
This chemistry video podcast investigates the reactions of ethanol, 1-butanol (ie butan-1-ol), 2-butanol (ie butan-2-ol) and methyl-2-propanol (ie methylpropan-2-ol) with potassium dichromate, potassium permanganate and sodium metal. We see that tertiary alcohols are less reactive than secondary alcohols, which are less reactive than primary alcohols.
Nov 11, 2008•4 min
Valence Shell Electron Pair Repulsion (video) August 11th 2008
The pairs of electrons that exist in the valence shells of atoms repel each other as far as possible. This repulsion helps determine the shapes of molecules formed in covalent compounds. This chemistry video podcast shows some of these possible shapes and explains their formation. (Some of you have experienced difficulties with the audio on the previous version of this episode. I have re-recorded the soundtrack in this podcast. Let me know if this solves the problem. Richard)
Aug 11, 2008•5 min
preparation and properties of gases - oxygen (video) august 2nd 2008
This chemistry video podcast demonstrates the laboratory production of oxygen gas, using thistle funnel, conical flask, gas jar, pneumatic trough, behive shelf and hydrogen peroxide decomposition (catalysed by manganese dioxide), its collection via the downward displacement of water and the subsequent testing that can be performed by reignition of a glowing wick.
Aug 02, 2008•3 min
reactions of hydroxide and ammonia solutions with salts of metals - (video) june 9 2008
This chemistry video podcast looks at the reactions of basic solutions (ie ammonia solution and hydroxide solutions) with solutions of metal salts (ie Mg, Al, FeII, FeIII, Cu, Zn, Ag, and Cr). As well as displaying the appearance of the resulting products, the chemical equations representing the reactions are shown. Demonstrated are the production of the complex ions aluminate, zincate and chromate from addition of excess hydroxide to solutions of the amphoteric metal salts of Al, Zn and Cr. The...
Jun 08, 2008•6 min
preparation and properties of gases - carbon dioxide (video) may 23 2008
This chemistry video podcast demonstrates the laboratory production of carbon dioxide gas, using thistle funnel, conical flask, gas jar and hydrochloric acid on calcium carbonate, its collection via the upward displacement of air and the subsequent testing that can be performed to illustrate carbon dioxide's properties of density and acidity, as well as the limewater test.
May 25, 2008•3 min
ionic compounds and formulae (video) feb 9 2008
It has been a long time since my last post, holidays and theft of my laptops have conspired against me. I intend to post some episodes of fundamental chemistry principles this year to help those of you in preliminary chemistry courses, or to be used for revision for others. This video chemistry podcast looks at how ionic compounds form, and how we write formulae to represent the relative amounts of ions in ionic compounds.
Feb 09, 2008•8 min
electrochemical cells (video) sept 19 07
This video chemistry podcasts looks at some aspects of electrochemistry as displayed in standard, simple high school chemistry experiments. The episode investigates standard reduction potentials, the concept of metal displacement, and electrochemical cells.
Sep 19, 2007•5 min
electrochemical cells (audio) sept 19 07
This enhanced chemistry podcasts looks at some aspects of electrochemistry as displayed in standard, simple high school chemistry experiments. The episode investigates standard reduction potentials, the concept of metal displacement, and electrochemical cells.
Sep 19, 2007•5 min
ionic equations (video) june 5 07
A simple concept that causes difficulties for students. ie using ionic equations to represent chemical reactions. This chemistry video podcast explains why spectator ions should not be included in a chemical equation.
Jun 05, 2007•20 sec
detergents (video) march 4 07
This short video chemistry podcast investigates the function of detegent molecules. It answers the questions "How can we wash greasy dishes?" and "Why is milk like 'fatty sweat'??!!"
Mar 04, 2007•4 min
detergents (audio) march 4 07
This audio chemistry podcast is the soundtrack for the video podcast 'detergents (video) march 4 07'. It investigates the function of detegent molecules.
Mar 04, 2007•4 min
intermolecular forces (video) feb 25 07
This chemistry video podcast looks at the intermolecular forces; dipole-dipole interactions and dispersion forces; that occur between covalent molecules. (There is another episode posted last year that looks at hydrogen bonding.)
Feb 25, 2007•31 sec
intermolecular forces (audio) feb 25 07
This file is the audio track for the video podcast 'intermolecular forces (video) feb 25 07'. It looks at dipole-dipole interactions and dispersion (london) forces.
Feb 25, 2007•6 min
molecular polarity (video) feb 18 07
This chemistry video podcast looks how electronegativity determines the type of bond that exists between two atoms, and how the symmetry of the resultant molecule will influence its overall dipole potential.
Feb 18, 2007•2 min
molecular polarity (audio) feb 18 07
This is the audiotrack of the chemistry video podcast 'molecular polarity (video) feb 18 07'. It looks at the concpt of electronegativity and how it influences bond and molecular polarity.
Feb 17, 2007•7 min
ionisation energy (video) feb 11 07
This chemistry video podcast looks at defining ionisation energy and explaining trends and periodicity of values for ionisation energy in the periodic table. I look at factors which influence the ease with which electrons may be removed from atoms.
Feb 11, 2007•3 min
ionisation energy (audio) feb 11 07
This chemistry podcast is the audio track for my video podcast 'Ionisation Energy (video) feb 11 07'. It looks at defining ionisation energy and explaining trends and periodicity of values for ionisation energy in the periodic table.
Feb 11, 2007•8 min
I'm Excited! (video) Feb 4 07
This podcast looks at how the modern model of the atom was developed.
Feb 04, 2007•8 min
valence shell electron pair repulsion (video) jan 27 07
The pairs of electrons that exist in the valence shells of atoms repel each other as far as possible. This repulsion helps determine the shapes of molecules formed in covalent compounds. This podcast shows some of these possible shapes and explains their formation.
Jan 27, 2007•5 min
valence shell electron pair repulsion (audio) jan 27 07
Hi, this audio file is a copy of the soundtrack from the podcast 'valence shell electron pair repulsion (video) jan 27 07'. I hope that these audio files prove useful. Please let me know, one way or another.
Jan 27, 2007•1 min
the first 20 elements (audio file) (jan 23 07)
Hi, this audio file is a copy of the soundtrack for the previous podcast (ie the first 20 elements (video file) (jan 23 07)). I hope that these audio files prove useful. Please let me know, one way or another.
Jan 23, 2007•3 min
the first 20 elements (video file) (jan 23 07)
Hi, and welcome back to this year's chemistry podcasts. We'll start the year simply with an acronym to help you remember the first twenty elements in order. I will try to post a separate audio file (ie the sound track for the video podcast) for each episode this year, so that if your mp3 player doesn't have video capabilities, you can still listen to the episodes when you are out and about. Please let me know if you think these audio files are useful.
Jan 23, 2007•3 min
pH and Kw
In this podcast I look at how pH is determined, what it means, some examples, and some important equilibria.
Nov 14, 2006•6 min
hydrogen bonds
I won't be able to put up another episode for a couple of weeks as all my spare time will be taken up marking TEE papers! This podcast looks at hydrogen bonds, how they form, what effects they have and their importance to life on Earth.
Nov 06, 2006•6 min
a few hindenburg facts
This podcast follows up the previous one on hydrogen fuel cells. In it I mentioned the Hindenburg airship, but have been contacted by a few people who didn't know about it. I've put together a few facts, pics and video of it (including one of its safe landings in the US) as a starting point if you want to research it.
Nov 04, 2006•5 min
hydrogen fuel cells
Hydrogen fuel cells offer a possible solution to mankind's future energy needs. This video podcast gives a brief introduction. These cells like all electrochemical cells are essentially reliant on a redox reaction ie exchange of electrons. In Western Australia, along with other parts of the world, hydrogen fuel celled buses are being trialled. I have written a lot of educational materials for teachers and students based on the Western Australian trial. These materials have been used by teachers ...
Oct 24, 2006•5 min
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