Double Arrows

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Double Arrows

Postby ahuang » Thu Dec 05, 2019 8:33 pm

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 <->)?

Kallista McCarty 1C
Posts: 212
Joined: Wed Sep 18, 2019 12:18 am

Re: Double Arrows

Postby Kallista McCarty 1C » Thu Dec 05, 2019 8:36 pm

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.

andrewcj 2C
Posts: 102
Joined: Thu Jul 11, 2019 12:17 am

Re: Double Arrows

Postby andrewcj 2C » Thu Dec 05, 2019 8:41 pm

It is always used in equilibriums to show a dynamic constant state of simultaneous reaction.

Matthew Tsai 2H
Posts: 101
Joined: Wed Sep 18, 2019 12:20 am

Re: Double Arrows

Postby Matthew Tsai 2H » Thu Dec 05, 2019 8:48 pm

Not sure if you will be penalized, but it would probably be best to get used to including double arrows for equilibrium reactions.

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