balancing chemical reactions

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Andrea- 3J
Posts: 56
Joined: Tue Nov 14, 2017 3:00 am

balancing chemical reactions

Postby Andrea- 3J » Thu Apr 26, 2018 11:36 pm

_Cu+_HNO3-> _Cu(NO3)2+_NO+_H2O

NabilaNizam-1K
Posts: 30
Joined: Fri Apr 06, 2018 11:04 am

Re: balancing chemical reactions

Postby NabilaNizam-1K » Fri Apr 27, 2018 1:05 pm

Cu + 4HNO3 --> Cu(NO3)2 + 2NO + 2 H2O

Andrea- 3J
Posts: 56
Joined: Tue Nov 14, 2017 3:00 am

Re: balancing chemical reactions

Postby Andrea- 3J » Tue May 01, 2018 11:06 pm

Hi,
I tried it your way but I still got the balancing wrong. With your way the reactants are
Cu:1
H:4
N:4
O:12
while the products are
Cu:1
H:4
N:4
O:10
The oxygens don't match.

EllenRenskoff-1C
Posts: 32
Joined: Fri Apr 06, 2018 11:04 am

Re: balancing chemical reactions

Postby EllenRenskoff-1C » Fri May 04, 2018 7:26 pm

I got 3Cu + 8HNO3 -> 3Cu(NO3)2 + 2NO + 4H2O. I balanced the copper last because it was already balanced to begin with, so I knew that whatever coefficient was in front of the carbon on the reactants side would be the same as the coefficient on the products side for Cu(NO3)2. I tried to balance the hydrogens first because they only are in one product and one reactant.

juliaschreib1A
Posts: 29
Joined: Fri Sep 29, 2017 7:06 am

Re: balancing chemical reactions

Postby juliaschreib1A » Sun May 06, 2018 11:23 pm

Does anyone know an easier way to balance chemical equations? How do you know when and how to use fractions?

Jocelyn1B
Posts: 27
Joined: Fri Apr 06, 2018 11:04 am

Re: balancing chemical reactions

Postby Jocelyn1B » Tue May 08, 2018 2:17 pm

juliaschreib1A wrote:Does anyone know an easier way to balance chemical equations? How do you know when and how to use fractions?

If you look at the topic "trick to balance" that may help you find an easier to way to balance the chemical equations. Hope it helps!

Sonia Aronson 1B
Posts: 30
Joined: Fri Apr 06, 2018 11:01 am

Re: balancing chemical reactions

Postby Sonia Aronson 1B » Wed May 09, 2018 9:17 am

Some textbooks say an easy way is to start balancing with the element that is present in the least number of equations and to balance products/reactants that are just one element last

CMaduno_3D
Posts: 15
Joined: Wed Sep 18, 2019 12:18 am

Re: balancing chemical reactions

Postby CMaduno_3D » Sat Oct 19, 2019 9:19 pm

To add to this most recent comment, an example would be in combustion reactions, where oxygen gas is always by itself on the reactant side of the chemical equation.


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