Leaving Cert. Chemistry

grinds

Anyone know any good leaving cert chemistry revision sites?

dynamot

you should try the Khan Academy, some of his lessons are very good

Victoria.

Look for Chemguy on youtube.
He's great for any topic but especially stoichiometry and organic chem.

grinds

Thanks for the suggestions... Also found a site called thebigtest.ie Good way to revise chemistry short answer questions.

Chuchoter

Any body any good places to learn how to do chemical bonding and formulae? Having great trouble doing the dot and cross diagrams for bonding the big compounds like CH3CHO.

grinds

Run a search on youtube... There are some good tutorials there that you could use

jumpguy

crayolastereo wrote: »

Any body any good places to learn how to do chemical bonding and formulae? Having great trouble doing the dot and cross diagrams for bonding the big compounds like CH3CHO.

We have to know dot and cross diagrams for...CH3CHO? Surely not!

EDIT: Just looked it up and apparently that's ethanal, which we haven't done yet. Maybe you do...but I doubt it.

grinds

You won't need it for organic chemistry.

Fizzical

crayolastereo wrote: »

Any body any good places to learn how to do chemical bonding and formulae? Having great trouble doing the dot and cross diagrams for bonding the big compounds like CH3CHO.

The main thing here is to remember that the carbon atoms are always linked in a chain and the others are attached in the order that theyre written. Also carbon must have four bonds, oxygen must have two and hydrogen must have one.

[Thats if you count a double bond as two and a triple as three...not exact but I hope you know what I mean...]

So the above is C to C with a single bond. Then three Hs to the first C [so the C has four bonds]. And the second C has a single bond to the next H and a double bond to the O.

Draw a line for each single bond, a double line for a double bond etc.
And then every line consists of two electrons, one dot and one cross.

grinds

For the organic questions you just need to remember that every carbon has 4 bonds, every hydrogen 2 bonds and every oxygen 1 bond. After drawing a structure like CH3CHO check to ensure that every atom has the correct number of connecting bonds

Eva213

Eircom study hub has some good tutorials, if you're with Eircom.
Does anyone know any website that has videos on Biology, Physics or Chemistry mandatory experiments?

YoursSincerely

Eva213 wrote: »

Eircom study hub has some good tutorials, if you're with Eircom.
Does anyone know any website that has videos on Biology, Physics or Chemistry mandatory experiments?

http://chemistry.slss.ie/resource_category/view/1268

This is like a teachers website which i came across their stuff for experiments is pretty good and the physics page is pretty good as well

Sunny!!

YoursSincerely wrote: »

http://chemistry.slss.ie/resource_category/view/1268

This is like a teachers website which i came across their stuff for experiments is pretty good and the physics page is pretty good as well

The link up above is excellent for the experiments.

- chemistry live!
- rapid revision chemistry
- exam edge
- exam papers

your sorted!!

Eva213

YoursSincerely wrote: »

http://chemistry.slss.ie/resource_category/view/1268

This is like a teachers website which i came across their stuff for experiments is pretty good and the physics page is pretty good as well

Cheers!