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
Friday, December 27, 2019
Sunday, December 15, 2019
Acid + Carbonate
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
Sunday, November 24, 2019
acid + base
When an acid and a base are mixed together they react to produce a salt and water.
The general word equation for this type of acid-base reaction is:
The general word equation for this type of acid-base reaction is:
acid + base → salt + water
But can you write the word equation for the reaction between a specific acid, for example hydrochloric acid , and specific base, say sodium hydroxide?
AUS-e-TUTE is here to help!
We've just added new learning resources; a tutorial, game, test and exam to help our members write acid + base word equations. We even have a worksheet wizard that lets teachers make their own printable worksheet or quiz on this topic.
You can join AUS-e-TUTE today at https://www.ausetute.com.au/register.html
If you would like to a view a read-only tutorial for free, you can at https://www.ausetute.com.au/weacidbase.html
Saturday, November 9, 2019
acid + metal
When you add an acid to a metal you expect a chemical reaction to occur in which you produce a salt and hydrogen gas.
Your teacher expects you to be able to write a word equation to describe this chemical reaction.
AUS-e-TUTE has just added a new tutorial, game, test, and exam to help you write word equations for the chemical reaction between an acid and a metal.
AUS-e-TUTE Members should log-in to use these new resources.
If you are not a Member of AUS-e-TUTE, you can access the "free-to-view" tutorial : https://www.ausetute.com.au/weacidmetal.html
Your teacher expects you to be able to write a word equation to describe this chemical reaction.
AUS-e-TUTE has just added a new tutorial, game, test, and exam to help you write word equations for the chemical reaction between an acid and a metal.
AUS-e-TUTE Members should log-in to use these new resources.
If you are not a Member of AUS-e-TUTE, you can access the "free-to-view" tutorial : https://www.ausetute.com.au/weacidmetal.html
Thursday, October 24, 2019
World Teachers' Day
How would you describe your Chemistry teacher? Inspirational? Boring? Caring? A bully? Compassionate? Dedicated? Disinterested?
How would your Chemistry teacher describe you?
In common with all your other teachers, your Chemistry teacher's greatest desire is to inspire you and to help you achieve success in your studies. (Yes, I am serious!)
Your Chemistry teacher will be disappointed when you don't attempt your homework, hand in your lab reports and assessments on time, and when you are distracted in class or lack concentration. Your teacher will try to help you, sometimes this might feel like a teacher "picking on you", harassing you or bullying you, but your teacher just wants to get you focused and trying to do the work required to the best of your ability.
Teachers get frustrated when capable students don't submit work that reflects their abilities, and when students try to "look up" or "find" the answer rather than think through a problem and arrive at a solution through their own efforts. Teachers get excited when students "get it", when they achieve results better than expected, when they display interest, and when they try to solve problems through their own efforts (especially when the student finds the work difficult).
Teachers will make allowances for student "mis"-behaviour when they know you are not feeling well or are feeling stressed, when assessments are due, during exams, etc. But do you make similar allowances for your teacher's "mis"-behaviour ... yes... teachers get sick and stressed too (they are only human after all)! Assessments and exams to mark, reports to write, lessons to plan, whole teaching programs to revise and/or write, not to mention thinking about new ways to present concepts to students who have failed to understand them.
You are probably at school because you "need to be", you view it as a stepping-stone to your career goal or future aspirations. Have you ever wondered why your teacher is at school?
Your Chemistry teacher is at school because they want to share their love of Chemistry with you and to help you understand Chemistry so that you will also enjoy it and achieve the best results you can.
On International Teachers' Day, take a moment to think about how your Chemistry teacher might see you as a student, and, think about how you might help your teacher to help you.
International "World Teachers' Day" is held annually on the 5th October .... unless you are in Australia where this date usually falls in the school holidays, so the Australian version of "Teachers' Day" is held on the last Friday in October (25th October 2019).
How would your Chemistry teacher describe you?
In common with all your other teachers, your Chemistry teacher's greatest desire is to inspire you and to help you achieve success in your studies. (Yes, I am serious!)
Your Chemistry teacher will be disappointed when you don't attempt your homework, hand in your lab reports and assessments on time, and when you are distracted in class or lack concentration. Your teacher will try to help you, sometimes this might feel like a teacher "picking on you", harassing you or bullying you, but your teacher just wants to get you focused and trying to do the work required to the best of your ability.
Teachers get frustrated when capable students don't submit work that reflects their abilities, and when students try to "look up" or "find" the answer rather than think through a problem and arrive at a solution through their own efforts. Teachers get excited when students "get it", when they achieve results better than expected, when they display interest, and when they try to solve problems through their own efforts (especially when the student finds the work difficult).
Teachers will make allowances for student "mis"-behaviour when they know you are not feeling well or are feeling stressed, when assessments are due, during exams, etc. But do you make similar allowances for your teacher's "mis"-behaviour ... yes... teachers get sick and stressed too (they are only human after all)! Assessments and exams to mark, reports to write, lessons to plan, whole teaching programs to revise and/or write, not to mention thinking about new ways to present concepts to students who have failed to understand them.
You are probably at school because you "need to be", you view it as a stepping-stone to your career goal or future aspirations. Have you ever wondered why your teacher is at school?
Your Chemistry teacher is at school because they want to share their love of Chemistry with you and to help you understand Chemistry so that you will also enjoy it and achieve the best results you can.
On International Teachers' Day, take a moment to think about how your Chemistry teacher might see you as a student, and, think about how you might help your teacher to help you.
International "World Teachers' Day" is held annually on the 5th October .... unless you are in Australia where this date usually falls in the school holidays, so the Australian version of "Teachers' Day" is held on the last Friday in October (25th October 2019).
Saturday, October 19, 2019
Naming Nitriles
How do you name a molecule like H-C≡N?
If you are an inorganic chemist you might call it:
AUS-e-TUTE has a new tutorial, game and test to help our members understand and apply IUPAC naming rules to nitriles. Members should log-in to use these new resources.
If you are not a member of AUS-e-TUTE you can access a "free-to-view" tutorial on naming nitriles at https://www.ausetute.com.au/namnitrile.html
If you are an inorganic chemist you might call it:
- hydrogen cyanide (hydrogen name)
- hydridonitridocarbon (additive name)
- methylidyneazane (substitutive name)
- hydrogen cyanide (functional class name)
- formonitrile (preferred IUPAC name)
- methanenitrile (substitutive name)
AUS-e-TUTE has a new tutorial, game and test to help our members understand and apply IUPAC naming rules to nitriles. Members should log-in to use these new resources.
If you are not a member of AUS-e-TUTE you can access a "free-to-view" tutorial on naming nitriles at https://www.ausetute.com.au/namnitrile.html
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