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Double Arrows

Posted: Thu Dec 05, 2019 8:33 pm
by ahuang
I understand that you use a single arrow in an equation to show when a strong acid or base completely dissociates in water, but does that mean you use double arrows for everything that is not a strong acid or base? In the homework, none of the equations used double arrows. Would we be penalized on the final exam if one uses the wrong arrows (-> versus <->)?

Re: Double Arrows

Posted: Thu Dec 05, 2019 8:36 pm
by Kallista McCarty 1C
Double arrows just show that the reaction is reversible! It is a good habit to get into to use them when writing the equations for weak acids and bases but I don't think it is required.

Re: Double Arrows

Posted: Thu Dec 05, 2019 8:41 pm
by andrewcj 2C
It is always used in equilibriums to show a dynamic constant state of simultaneous reaction.

Re: Double Arrows

Posted: Thu Dec 05, 2019 8:48 pm
by Matthew Tsai 2H
Not sure if you will be penalized, but it would probably be best to get used to including double arrows for equilibrium reactions.