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Equilibrium Arrow

Posted: Fri Jan 18, 2019 1:38 am
by Meigan Wu 2E
Do only reactions using weak acids and bases use an equilibrium arrow?

Re: Equilibrium Arrow

Posted: Fri Jan 18, 2019 1:45 am
by Mona Lee 4L
For reactions involving a strong acid and base, you can assume 100% protonation / deprotonation, and the single arrow represents the heavy skew towards products.

Re: Equilibrium Arrow

Posted: Fri Jan 18, 2019 2:50 am
by MadisonB
Moreover, you use two arrows for weak acids and bases because there will be some sort of equilibrium where not everything is disassociated.

Re: Equilibrium Arrow

Posted: Sat Jan 19, 2019 11:41 pm
by Aili Ye 4L
Yes, only weak acids and bases use the equilibrium arrow. Strong acids and bases are considered 100% ionization in water thus only use one arrow

Re: Equilibrium Arrow

Posted: Sun Jan 20, 2019 12:37 am
by Saman Andalib 1H
As Dr. Lavelle depicted in class, the arrow in the chemical equation for any reaction involving a strong acid or a strong base is simplified as being one arrow because of the overwhelming skew it has to one side of the reaction. This does not mean that the reverse reaction is not occurring, but only that it is occurring at a much lesser rate.

Re: Equilibrium Arrow

Posted: Sun Jan 20, 2019 10:32 am
by Vanadium Wang 4H
The two way arrow is used for chemical reactions that are in equilibrium. However, when an arrow is only pointing in one direction, that indicates that the equilibrium is favoring either product or reactant.

Re: Equilibrium Arrow

Posted: Sun Jan 20, 2019 3:44 pm
by Simmi Diwanji 2B
The equilibrium arrows should be used for all reactions in equilibrium, no matter if it is a strong or weak acid or base. However, if the reaction favors one side, the products or the reactants, than the lengths of the arrows become skewed in the respective directions.

Re: Equilibrium Arrow

Posted: Sun Jan 20, 2019 5:05 pm
by 904914909
If a rxn completely dissociates, ie a strong acid or base, then an equilibrium arrow is not used