Adding Water

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Orly Termeie 3I
Posts: 94
Joined: Fri Sep 25, 2015 3:00 am

Adding Water

Postby Orly Termeie 3I » Sun Nov 15, 2015 3:37 pm

Hello! When does the addition of water to a reaction at equilibrium affect concentration? Also, when computing the K value when are aqueous molecules included?

Amy Dao 3K
Posts: 21
Joined: Fri Sep 25, 2015 3:00 am

Re: Adding Water

Postby Amy Dao 3K » Sun Nov 15, 2015 9:15 pm

Water will affect the concentration so long as it is not in a liquid (or I guess solid form either), because when water is a liquid, it is by definition present at unit concentration, so changing the amount of water will not affect the reaction. Also, I believe that aqueous molecules are always included in K calculations. Someone please correct me if I'm wrong in any way in answering this!

Jana Sandhu 3J
Posts: 25
Joined: Fri Sep 25, 2015 3:00 am

Re: Adding Water

Postby Jana Sandhu 3J » Fri Nov 20, 2015 5:05 pm

Hi! Adding water could reduce concentration because there would be the same amount of moles of a substance but in a larger volume of solution. However it all depends on the problem, and usually information will be given that would allow you to determine the new initial concentrations to put into the ICE box.

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