Mole Coefficients in Chemical Equations

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Jackie Ngo 1C
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Joined: Fri Sep 29, 2017 7:06 am

Mole Coefficients in Chemical Equations

Postby Jackie Ngo 1C » Thu Oct 04, 2018 11:48 pm

for example, in 2Na + 2H2O --> 2NaOH + H2, the formula, in Mole terms is essentially 2 moles + 2 moles --> 2 moles + 1 mole. Why aren't the mole coefficients equal on both sides?

Jovian Cheung 1K
Posts: 48
Joined: Fri Sep 28, 2018 12:16 am

Re: Mole Coefficients in Chemical Equations

Postby Jovian Cheung 1K » Thu Oct 04, 2018 11:53 pm

While the numbers of moles for each element has to be equal, the numbers of moles for molecules etc. in general don't have to be equal on both sides.
Part of the point of balancing is that no atoms spontaneously get created, and no atoms spontaneously disappear. But otherwise they can combine/split to form different numbers of molecules etc. and there's no problem with it!

yaosamantha4F
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Joined: Fri Sep 28, 2018 12:29 am

Re: Mole Coefficients in Chemical Equations

Postby yaosamantha4F » Thu Oct 04, 2018 11:55 pm

The coefficients are used to represent the number of atoms/molecules on each side! With coefficients of 2, 2, 2, and 1, both sides of the reaction end up with 2 atoms of Na, 4 atoms of H, and 2 atoms of O.

Madeera_Mian_3B
Posts: 30
Joined: Fri Sep 28, 2018 12:24 am

Re: Mole Coefficients in Chemical Equations

Postby Madeera_Mian_3B » Fri Oct 05, 2018 12:38 am

It is true that the moles coefficients are not "equal" on both sides. But, the process of balancing the equation is trying to make sure the atoms/elements are the same.

Grace Diaz 3F
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Joined: Fri Sep 28, 2018 12:24 am

Re: Mole Coefficients in Chemical Equations

Postby Grace Diaz 3F » Sun Oct 07, 2018 3:44 pm

The moles are not equal but the number of atoms of each element in both the reactant and product side are. The moles indicate the amount of compounds that can be created from the given atoms.

Manas Jinka
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Joined: Fri Sep 28, 2018 12:26 am

Re: Mole Coefficients in Chemical Equations

Postby Manas Jinka » Sun Oct 07, 2018 5:04 pm

Balancing equations deals simply with making sure that the number of atoms are equal one both sides of the equation. This is based on the law of conservation of mass, which means that atoms can neither be created or destroyed.

Abhi4F
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Joined: Fri Sep 28, 2018 12:28 am

Re: Mole Coefficients in Chemical Equations

Postby Abhi4F » Sun Oct 14, 2018 3:49 pm

While the mole coefficients may not be equal, this does not mean the equation is not balanced. Balancing equations deals with the same number of atoms/elements on the reactant and product side.


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