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Balancing equations
Topic Started: Dec 31 2010, 04:34 AM (587 Views)
Michelle
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Can someone help me with this?
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CJ
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A very minor case of serious brain damage

OK, then. I'll go through a simple example:

H2 + O2 --> H2O

Before doing anything else, we count how many atoms of each type we have in total on each side, so let's do that:

Left (reactants): 2 hydrogen, 2 oxygen
Right (products): 2 hydrogen, 1 oxygen

We need to get an extra oxygen atom on the right hand side, and the only way to do that is by doubling the number of water molecules:

H2 + O2 --> 2H2O

Now, once again, we count what we have on each side:

Left (reactants): 2 hydrogen, 2 oxygen
Right (products): 4 hydrogen, 2 oxygen

Now, we have 2 oxygen atoms on both sides. However, we've now got 2 hydrogen atoms on the left, and 4 on the right. We can solve this by doubling the number of hydrogen molecules on the left hand side:

2H2 + O2 --> 2H2O

Now, we count again:

Left (reactants): 4 hydrogen, 2 oxygen
Right (products): 4 hydrogen, 2 oxygen

Now that they're equal, we're done!

(Maybe I should do a video about this....)
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Michelle
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That was kinda confusing but it at least answers my question. Thanks.
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CJ
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A very minor case of serious brain damage

You're welcome.

Would it help if I made a video about this later?
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Michelle
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Yeah, it would, I'd appreciate it.

When people teach something, I prefer it if they were talking while demonstrating.
Edited by Michelle, Jan 5 2011, 05:44 PM.
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CJ
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A very minor case of serious brain damage

Me too. It's a bit difficult to do good demonstrations over the internet.
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Michelle
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I know, it's so true.
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CJ
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A very minor case of serious brain damage

Finally made my video:

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childlimbs
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♡ sad flower ♡

lawlz that vid would've been quite helpful like. a month or two ago. haha.
when we did this i thought it was quite easy. but one of my friends had a lot of trouble with it.
haha idk i just find most chemistry easy.
i'm saying that now...but the midterm is probs gonna killll meeeee
you should also make more chem vids. just saying.
that's probs really off topic but i just wanted to say that. haha. xD
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CJ
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A very minor case of serious brain damage

Thanks! Any specific requests?
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childlimbs
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♡ sad flower ♡

stoichiometry or however you spell it
and limiting and excess reagents...or whatever.
if you can do them. idk i found those topics to be one of the harder parts of chemistry.
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CJ
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A very minor case of serious brain damage

I can vaguely remember....I'd probably have to revise them before making a vid, though.
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Michelle
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...I vaguely get it...


*chemistry melts my brain and makes me look like a *censored*tard*
Edited by Michelle, Jan 20 2011, 03:24 AM.
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CJ
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A very minor case of serious brain damage

OK....

It doesn't really involve any chemistry, actually. There's not really much more to it than counting.
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Michelle
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Oh okay then...
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Michelle
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So yeah... no offence but you failed to mention that it's the valence electrons. No wonder I didn't get this ****.
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