Friday, January 31, 2020
Monday, January 27, 2020
Properties of Aldehydes and Ketones
Aldehydes and ketones contain the same functional group, for example, butanal and butanone both contain the same carbonyl functional group (C=O). So how would you tell if a substance was butanal or butanone?
AUS-e-TUTE has just added new resources to help you understand the similarities and differences in the chemical and physical properties of aldehydes and ketones (as represented by alkanals and alkanones). AUS-e-TUTE Members should log-in to use the new tutorial, game, test and exam with worked solutions.
If you are not an AUS-e-TUTE member there is currently a "free-to-view" tutorial on this topic at https://www.ausetute.com.au/ketones.html
AUS-e-TUTE has just added new resources to help you understand the similarities and differences in the chemical and physical properties of aldehydes and ketones (as represented by alkanals and alkanones). AUS-e-TUTE Members should log-in to use the new tutorial, game, test and exam with worked solutions.
If you are not an AUS-e-TUTE member there is currently a "free-to-view" tutorial on this topic at https://www.ausetute.com.au/ketones.html
Saturday, January 25, 2020
How to write half-equations for aqueous solutions under basic conditions
Lots of common batteries like alkaline batteries and NiCad batteries use oxidation and reduction reactions in alkaline, or basic, conditions.
Learn how to write half-equations for these reactions at https://www.ausetute.com.au/halfeqtnb.html
AUS-e-TUTE Members should log-in to access the new tutorial, game and test with worked solutions to help you learn how to write these half-equations for basic conditions.
Learn how to write half-equations for these reactions at https://www.ausetute.com.au/halfeqtnb.html
AUS-e-TUTE Members should log-in to access the new tutorial, game and test with worked solutions to help you learn how to write these half-equations for basic conditions.
Thursday, January 23, 2020
How to write half-equations for aqueous solutions under acidic conditions
Some batteries, like lead-acid batteries used in cars, and some fuel cells like those that use alcohols, rely on oxidation and reduction reactions that occur in aqueous solution under acidic conditions.
You will need to be able to write half-equations for these reactions.
How do you write balanced chemical half-equations for these reactions?
Go to https://www.ausetute.com.au/halfeqtn.html to find out!
AUS-e-TUTE Members should log-in to use the Members ONLY tutorial, game, test and exam (with worked solutions).
You will need to be able to write half-equations for these reactions.
How do you write balanced chemical half-equations for these reactions?
Go to https://www.ausetute.com.au/halfeqtn.html to find out!
AUS-e-TUTE Members should log-in to use the Members ONLY tutorial, game, test and exam (with worked solutions).
Friday, December 27, 2019
Hydrolysis of Acids and Bases
If you want to find the value of the acid dissociation constant for a weak acid you look up tables of values. For example, the value of Ka for acetic acid (ethanoic acid) is always tabulated.
But what if you want the value of a base dissociation constant? What if you want the value of Kb for the acetate ion (ethanoate ion)? You won't find this value in a table, you'll have to know how to calculate it!
AUS-e-TUTE has just added new resources to help you understand and apply the concept of acid and base hydrolysis including calculations. AUS-e-TUTE Members should log-in to access the new tutorial, game, test, exam (with worked solutions), and teacher members can access the worksheet wizard to make printable worksheets and quizzes (with answers).
If you are not an AUS-e-TUTE Member, the "free-to-view" tutorial is currently available at
https://www.ausetute.com.au/kakbkw.html
But what if you want the value of a base dissociation constant? What if you want the value of Kb for the acetate ion (ethanoate ion)? You won't find this value in a table, you'll have to know how to calculate it!
AUS-e-TUTE has just added new resources to help you understand and apply the concept of acid and base hydrolysis including calculations. AUS-e-TUTE Members should log-in to access the new tutorial, game, test, exam (with worked solutions), and teacher members can access the worksheet wizard to make printable worksheets and quizzes (with answers).
If you are not an AUS-e-TUTE Member, the "free-to-view" tutorial is currently available at
https://www.ausetute.com.au/kakbkw.html
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Sunday, December 15, 2019
Acid + Carbonate
Carbonate is found in lots of rock-forming minerals as well as in egg shells, corals and oyster shells. It is a major component of limestone, and of marble.
What happens when carbonate minerals, shells, corals and marble statues meet acids?
AUS-e-TUTE has just added a new tutorial, game, test and exam to help you write word equations for carbonate and acid chemical reactions. AUS-e-TUTE members should log-in to use these new resources.
A "free-to-view" tutorial is currently available to non-members at
https://www.ausetute.com.au/weacidcarbonate.html
What happens when carbonate minerals, shells, corals and marble statues meet acids?
AUS-e-TUTE has just added a new tutorial, game, test and exam to help you write word equations for carbonate and acid chemical reactions. AUS-e-TUTE members should log-in to use these new resources.
A "free-to-view" tutorial is currently available to non-members at
https://www.ausetute.com.au/weacidcarbonate.html
Wednesday, December 4, 2019
Lithium-ion batteries
When you walk around having a chat to your friends on your mobile
phone, or watch a show on your tablet, or do your homework on your laptop in a
cosy cafe, have you ever stopped to wonder about the amazing revolution in
chemistry that allows you to do these "every day" things?
Batteries that are small, that can store enough electrical energy
so that they can be used continuously for hours, can be quickly recharged, and
can be discharged and recharged many, many times, are a very recent
development. Without these batteries your life-style would be a lot less
mobile!
What makes these batteries so special?
Find out in the December 2019 issue of AUS-e-NEWS
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