ICE Chart  [ENDORSED]

Moderators: Chem_Mod, Chem_Admin

Nha Dang 2I
Posts: 53
Joined: Fri Sep 29, 2017 7:07 am

ICE Chart

Postby Nha Dang 2I » Wed Dec 06, 2017 7:48 am

When using an ICE chart, do you only you use it for weak acids/bases where there's an equilibrium reaction? Why?

Jasmine Wu 1L
Posts: 55
Joined: Thu Jul 27, 2017 3:00 am
Been upvoted: 1 time

Re: ICE Chart

Postby Jasmine Wu 1L » Wed Dec 06, 2017 8:16 am

Strong acids/bases are completely ionized in solution, but weak acids/bases are not. So you would need to calculate the concentrations, which is what the ICE box is for.

Guadalupe T 1E
Posts: 58
Joined: Fri Sep 29, 2017 7:04 am

Re: ICE Chart

Postby Guadalupe T 1E » Wed Dec 06, 2017 9:21 am

When there are problems where we have to use ice boxes, are the acids and bases automatically weak?

JamesAntonios 1E
Posts: 70
Joined: Fri Sep 29, 2017 7:04 am

Re: ICE Chart

Postby JamesAntonios 1E » Wed Dec 06, 2017 9:46 am

It's okay to use an ICE chart whenever there is a reaction. It just depends what you put for the starting and change values. For a strong base/acid, the change will cause the reactant base/acid to go to 0 while for weak base/acid, there will be some reactant still left over.

Cali Rauk1D
Posts: 51
Joined: Fri Sep 29, 2017 7:03 am

Re: ICE Chart

Postby Cali Rauk1D » Wed Dec 06, 2017 11:30 am

How do you tell which way the reaction is going and where to put the + or - X

Alissa Stanley 3G
Posts: 22
Joined: Fri Sep 29, 2017 7:06 am
Been upvoted: 1 time

Re: ICE Chart  [ENDORSED]

Postby Alissa Stanley 3G » Wed Dec 06, 2017 12:48 pm

The general rule for this is that the reactants will have a -X and the products will have a +X. This makes sense because the products are initially starting with 0, so they have to have something added.

Chem_Mod
Posts: 17949
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 406 times

Re: ICE Chart

Postby Chem_Mod » Wed Dec 06, 2017 1:26 pm

Additionally, the wording in the question will give you context regarding which direction the reaction will proceed, and thus which species will have "-x" or "+x" in the "change" portion of the ICE box.

It's also possible that a question gives you the current concentrations of all species as well as the K value, in which case you'd have to calculate the reaction quotient, Q, and compare it with K to see which direction the reaction will proceed.

Radha Patel 1D
Posts: 25
Joined: Sat Jul 22, 2017 3:00 am

Re: ICE Chart

Postby Radha Patel 1D » Wed Dec 06, 2017 4:13 pm

Will questions generally give you how much of a reactant is left over in the case that it is a weak acid or base? Or do we just have to calculate it using the change x variable and the initial concentration?

diangelosoriano
Posts: 49
Joined: Fri Sep 29, 2017 7:07 am

Re: ICE Chart

Postby diangelosoriano » Wed Dec 06, 2017 4:29 pm

Is it possible to use an ICE chart if there are more than 2 reactants / products?

PranithaPrasad
Posts: 58
Joined: Fri Sep 29, 2017 7:06 am
Been upvoted: 1 time

Re: ICE Chart

Postby PranithaPrasad » Wed Dec 06, 2017 5:28 pm

We can, but I don't think we will have a problem with more than 2 products and 2 reactants mainly because it would get complicated.


Return to “Calculating pH or pOH for Strong & Weak Acids & Bases”

Who is online

Users browsing this forum: No registered users and 2 guests