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### How to Balance

Posted: Sat Apr 14, 2018 9:04 pm
Does someone have any tips how to balance complicated chemical equations? Some of the ones on the test were not ones you could figure out the numbers for right away. So I was wondering if someone has a helpful method to solve equations like those ones.

### Re: How to Balance

Posted: Sat Apr 14, 2018 9:33 pm
The regular process to balance a chemical equation consists of counting the amount of atoms in both the reactants and products because the mass on the left must equal the mass on the right. With this being stated, coefficients are used to balance between the elements on the left and right of the equation. However, when the equation is complicated to solve, it is best to tackle each element one by one or use the guess and check method, in which you choose a random number and try equaling out each side based on that mass.

### Re: How to Balance

Posted: Sat Apr 14, 2018 11:38 pm
Haya Rabadi wrote:Does someone have any tips how to balance complicated chemical equations? Some of the ones on the test were not ones you could figure out the numbers for right away. So I was wondering if someone has a helpful method to solve equations like those ones.

I would start with looking at the element that appears most often and then try to balance that element on both sides first, then balance the other elements.

### Re: How to Balance

Posted: Sun Apr 15, 2018 12:00 am
I like to start with the easiest coefficients and then go on from there.

### Re: How to Balance  [ENDORSED]

Posted: Sun Apr 15, 2018 8:45 am
My TA suggested doing a formula like setup where you put a blank in front of each one for example ____CH6 + ___O2-----> _____CO2 + ____H20
then you would assign each blank a letter... I'm going to use a,b,c, and d. so now C: 1a=1c H: 6a=2d O: 2b=2c+d then assign one variable equal to one I'm going to assign a=1 so then we know c =1 then if we plug in a into the hydrogen equation we get 3 and then plugging in c and d into the O equation we get 2.5 now multiply to get a whole number, in this case, multiply everything by 2 so a=2 b=5 c=2 and d=6 soo

2CH6 + 5O2 -----> 2CO2 + 6H20

### Re: How to Balance

Posted: Sun Apr 15, 2018 12:32 pm
A technique for more complex equations. Balance compounds that appear once. Often, it is required to use fractions and then multiply the entire equation by the denominator of the function to cancel out the fraction.