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Mole Coefficients in Chemical Equations

Posted: Thu Oct 04, 2018 11:48 pm
by Jackie Ngo 1C
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?

Re: Mole Coefficients in Chemical Equations

Posted: Thu Oct 04, 2018 11:53 pm
by Jovian Cheung 1K
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!

Re: Mole Coefficients in Chemical Equations

Posted: Thu Oct 04, 2018 11:55 pm
by yaosamantha4F
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.

Re: Mole Coefficients in Chemical Equations

Posted: Fri Oct 05, 2018 12:38 am
by Madeera_Mian_3B
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.

Re: Mole Coefficients in Chemical Equations

Posted: Sun Oct 07, 2018 3:44 pm
by Grace Diaz 3F
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.

Re: Mole Coefficients in Chemical Equations

Posted: Sun Oct 07, 2018 5:04 pm
by Manas Jinka
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.

Re: Mole Coefficients in Chemical Equations

Posted: Sun Oct 14, 2018 3:49 pm
by Abhi4F
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.