Balancing Procedure

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Celeste 1I
Posts: 44
Joined: Fri Sep 28, 2018 12:18 am

Balancing Procedure

Postby Celeste 1I » Thu Oct 04, 2018 9:27 pm

Question h.1 asks why you can't just add an extra O molecule to balance the equation? Why wouldn't we be able to do that?

Kathryn 1F
Posts: 66
Joined: Fri Sep 28, 2018 12:19 am

Re: Balancing Procedure

Postby Kathryn 1F » Thu Oct 04, 2018 9:29 pm

Hi!
I think because singular oxygen atoms are not a proper "product" of the equation, you can't just add them on to make the equation balanced. Even though it may appear balanced, they have changed the equation when you only need to change the ratios, making the eqn incorrect.
Last edited by Kathryn 1F on Thu Oct 04, 2018 9:33 pm, edited 1 time in total.

Celeste 1I
Posts: 44
Joined: Fri Sep 28, 2018 12:18 am

Re: Balancing Procedure

Postby Celeste 1I » Thu Oct 04, 2018 9:32 pm

I thought it might of been because of conservation of mass. We can't create nor destroy mass so adding it would be like creating mass?

SummerLee1F
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Joined: Fri Sep 28, 2018 12:16 am

Re: Balancing Procedure

Postby SummerLee1F » Thu Oct 04, 2018 9:32 pm

You cannot add "O" because you would essentially be inputting a different element that isn't actually produced in the chemical reaction. How I like to look at is that adding an extra "+ ___" is never okay.

Kathryn 1F
Posts: 66
Joined: Fri Sep 28, 2018 12:19 am

Re: Balancing Procedure

Postby Kathryn 1F » Thu Oct 04, 2018 9:38 pm

Celeste 1C wrote:I thought it might of been because of conservation of mass. We can't create nor destroy mass so adding it would be like creating mass?


I think that's the original issue with unbalanced eqns, that there is unequal mass/numbers of elements on both sides, so by balancing them, you make it equal. in the eqn in question, Cu+SO2--> CuO+S, there are 2 "O"s on the left, but only one on the right, so that's what makes it unequal.

Hilda Sauceda 3C
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Joined: Fri Sep 28, 2018 12:24 am

Re: Balancing Procedure

Postby Hilda Sauceda 3C » Sun Oct 07, 2018 8:22 pm

Celeste 1C wrote:Question h.1 asks why you can't just add an extra O molecule to balance the equation? Why wouldn't we be able to do that?

I remember that in lecture Dr. Lavelle said that atoms were not created nor destroyed.

shaunajava2e
Posts: 66
Joined: Fri Sep 28, 2018 12:26 am

Re: Balancing Procedure

Postby shaunajava2e » Sun Oct 07, 2018 8:37 pm

adding an O atom would change the composition of the molecule and therefore change the substance

Rehan Chinoy 1K
Posts: 67
Joined: Fri Sep 28, 2018 12:25 am

Re: Balancing Procedure

Postby Rehan Chinoy 1K » Tue Oct 09, 2018 10:54 am

Yes, you can't throw in an extra O atom because of the law of conservation of mass. Instead, manipulate stoichiometric coefficients such that the chemical equation is balanced, or that each side of the equation has the same number of atoms of each element.


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