Effect of Temperature on Solubility

What happens to the solubility of a salt or a gas at constant pressure when the temperature of the solution changes?
This can be treated as just a special case of Le Chatelier's Principle .....

And AUS-e-TUTe has just added new resources to help you understand the effect of temperature on solubility.
AUS-e-TUTE Members should log-in to use the new tutorial (includes a drill), game, test and exam.

If you are not an AUS-e-TUTE member, there is non-interactive "free-to-view" tutorial currently available for evaluation purposes at http://www.ausetute.com.au/solubilitylcp.html


Get a better understanding of concepts in chemistry, and improve your problem solving ..... join AUS-e-TUTE today!

Solutes, Solvents and Solutions

Seems like the science of solutions is simply seething with "s" sounds:

• solute
• solvent
• solution
• solubility
• solvation
• saturated (and unsaturated)

 but what do they mean?

AUS-e-TUTE has just added new resources to help you find out, and, understand the differences!
AUS-e-TUTE Members should log-in to use these new "Solutions Concepts" resources.

Not an AUS-e-TUTE Member?
A free-to-view tutorial is currently available on this topic for evaluation purposes at http://www.ausetute.com.au/solutions.html

When you're serious about learning some chemistry, join us at www.ausetute.com.au

Heat of Solution

Have you ever wondered why some salts dissolve in water to release heat while others absorb energy?

If so, you should take a look at AUS-e-TUTE's new resources on the Molar Enthalpy of Solution (or Molar Heat of Solution).

AUS-e-TUTE members should log-in to view the new tutorial, game, test, exam and homework checker under the heading Thermochemistry, and the topic heading Heat (enthalpy) of Solution.

Not an AUS-e-TUTE Member?
Currently there is a "free-to-view" tutorial available for evaluation purposes at http://www.ausetute.com.au/heatsolution.html

Find out about the benefits of AUS-e-TUTE membership at
http://www.ausetute.com.au/membership.html

then, when you are ready to start improving your chemistry results, you can join AUS-e-TUTE at
http://www.ausetute.com.au/register.html

Chemistry of Cement

What do the Roman Colosseum, the Roman Pantheon, a modern bridge and a modern dam all have in common?

Go to the March 2015 issue of AUS-e-NEWS to find out about the relevance of chemistry to the ancient Romans as well to modern day humans!

If you have not received this issue of AUS-e-NEWS, or, if you would like to subscribe to AUS-e-NEWS, please email us at :

Why Study Science?

Listen to four of the world’s most eminent physicists discuss and deliberate on the biggest challenges facing the science community today.

• Professor Steven Chu was the co-recipient of the 1997 Nobel Prize for Physics. He has devoted his recent scientific career to the search for new solutions to our energy and climate challenges. 
• Professor Schmidt was jointly awarded the 2011 Nobel Prize in Physics for the discovery of the accelerating Universe.
• Professor Lawrence Krauss is theoretical physicist and the author of several bestselling books, including The Physics of Star Trek and A Universe from Nothing. He is an advocate of scientific scepticism, science education and the science of morality.
• Professor Lisa Randall studies theoretical particle physics and cosmology at Harvard University. Her research connects theoretical insights to puzzles in our current understanding of the properties and interactions of matter.

The podcast is about 1.5 hours, but you can select parts of it to listen to.

There is a very nice discussion of what is meant by "good science", there is also some very interesting discussion on "accidental discovery", "experiment to "prove" or "disprove" theory, and the importance of acknowledging that science is not an "absolute" but rather about belief in the "truth" of a scientific theory based on statistical probabilities.

https://soundcloud.com/experience_anu/when_does_science_matter

Henry's Law and the Solubility of Gases

What is the relationship between the solubility of a gas in a solvent, and the pressure of the gas?
What happens to the solubility of gases as the temperature changes?
If you are asking these questions, you need AUS-e-TUTE's new Henry's Law resources!

AUS-e-TUTE Members will find the new resources listed under Gas Laws in the Members Only Test Centre. Where relevant to your syllabus, links to these resources have also been added to your Syllabus Study Guide.

If you are not an AUS-e-TUTE member, there is a "free-to-view" tutorial available for evaluation purposes at http://www.ausetute.com.au/henryslaw.html

Then, when you are ready to start improving your chemistry results, you can join AUS-e-TUTE at
http://www.ausetute.com.au/register.html

Determining Hypochlorite in Bleach

The active ingredient in household bleach is sodium hypochlorite, but just how much hypochlorite will you find in a litre of bleach?
You can easily find out in your school lab, all it takes is a redox titration, which, ofcourse, you will find at AUS-e-TUTE!
AUS-e-TUTE Members should log-in to the Test Centre to use the new tutorial with drill, game and test.

Visit http://www.ausetute.com.au for a complete list of "free" tutorials available for non-members.
Get information about how to improve your chemistry results at http://www.ausetute.com.au/membership.html
Begin improving your chemistry results at http://www.ausetute.com.au/register.html