Advice for Stoichiometry???

[Cofo]

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I need some help on stoichiometry. I mean I REEEEEEEALLY need some advice quickly, I am taking the summer course for chem 1 right now. ANy tips on how to do this kinda stuff?

 

[Ething]

Yes. Read the chapter in the book on it and your notes. If that doesn't work, get a tutor. If that doesn't work, repeat the process.

 

[burgler09]

when in doubt, convert to moles

if you want to pm me the problems I'll do what I can to solve them and explain how to do them. I am leaving to go to work so i wont be home until 10:30 though

 

[HenryH]

Whatever units you have on the top left must always be carried to the bottom right. For example:

1 mole Hydrogen X 1 gram Hydrogen/1 mole Hydrogen

or...

3 grams H2O/5 grams Oxygen X 1 mole H2O/18 grams H2O

It is hard to see it over the computer; write out the equations above on paper, but use a straight bar for the fractions (not a "/"). You will see what I'm talking about when I say that the units from the top left have to transfer and be the units on the bottom right. This rule is ALWAYS used. Once you figure this out, you can do almost any stoichiometry problem without hardly even thinking about it.

 

[Fuji]

For the basic concept of stoichiometry, try to use analogies that you can relate to. If you like cars, for example, you know that one car has 4 wheels. If each wheel has 5 lug nuts, then you can convert from cars to lug nuts by multiplying the number of cars by 4 (wheels/car) and then by 5 (lug nuts/wheel). The cars and wheels cancel, leaving you with lug nuts.

 

[Danny289]

If you learn (know) the concepts, you never will be in trouble. Don't memorize. Get the concept, What is the Mol? what is molar mass?
what and why 22.4 Lit for gases and....

 

[chrisvocker]

Yep, I second Danny

Don't memorize. Get the concept, What is the Mol? what is molar mass?

Also, at some point you should realize that you are just dealing with mathematical proportions except your're on chemistry's playground. Stoichiometry is just math ratios in a chemical context.

 

[burgler09]

good advice from everyone, take it all in and itll definetly help you out.

 

[LNinlove]

Here is a little picture to help you visualize what Fuji was saying. I hope it comes through ok...
What I did when I started gchem1 was go in and talk with my prof. He was pretty helpful and understanding. I didn't have a clue what a mole was or what stoichiometry was either. Just put a lot of time into it...get help from the science learning center or something...just get help, it will click then it will be easy for you. Good luck!

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