Importance of the State of Molecules

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Laura WM 3I
Posts: 31
Joined: Wed Sep 18, 2019 12:19 am

Importance of the State of Molecules

Postby Laura WM 3I » Sun Oct 06, 2019 2:32 pm

Is it important to include the state (solid/liquid/gas) when writing and balancing reactions? Will we be penalized if they are left off on a test? How does the state of a molecule affect the reaction?

DTingey_1C
Posts: 55
Joined: Fri Aug 30, 2019 12:16 am

Re: Importance of the State of Molecules

Postby DTingey_1C » Sun Oct 06, 2019 2:53 pm

I don't know how the reaction is impacted, but my TA said that you should get in the habit of doing it because it'll be important in the future. So, I'm assuming that it's important to do on tests as well.

Rebecca Epner 4A
Posts: 53
Joined: Sat Aug 17, 2019 12:18 am

Re: Importance of the State of Molecules

Postby Rebecca Epner 4A » Sun Oct 06, 2019 11:40 pm

I asked this question in a Step up session today and the UA told me that in most problems where we have to write chemical equations, the state will be explicitly given. But if it is not just try your best to guess because it may be worth a very small amount of points

Sanjana K - 2F
Posts: 102
Joined: Sat Sep 07, 2019 12:17 am
Been upvoted: 1 time

Re: Importance of the State of Molecules

Postby Sanjana K - 2F » Thu Oct 10, 2019 9:37 pm

The state will usually be given to you in the problem (ex: 25ml of precipitate means solid, NaOH dissolved in water means aqueous). When we do acids/bases and solubility equilibria especially, you'll become familiar with which compounds dissociate in water (nitrates, acetates, compounds with group 1 elements, sulfates, etc.) and which don't (most carbonates and phosphates, etc), so that'll help you distinguish between the states better. For now, just use what's given in the problem.

Ayushi2011
Posts: 101
Joined: Wed Feb 27, 2019 12:17 am

Re: Importance of the State of Molecules

Postby Ayushi2011 » Thu Oct 10, 2019 11:44 pm

Doesn't hurt to write it down because its just additional helpful information!

kristi le 2F
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

Re: Importance of the State of Molecules

Postby kristi le 2F » Fri Oct 25, 2019 11:48 pm

Also, clarifying the state of molecules can be important for molecules like water, that can exist in multiple forms.

Mai V 4L
Posts: 111
Joined: Fri Sep 28, 2018 12:23 am

Re: Importance of the State of Molecules

Postby Mai V 4L » Sun Dec 08, 2019 9:09 am

Does anyone have a video they think is a good reference for this topic?


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