## ICE Tables

Andrea_Torres
Posts: 98
Joined: Sun Sep 15, 2019 12:15 am

### ICE Tables

Why is it that H2O gets cancelled out when doing ice tables?

Matthew Chan 1B
Posts: 111
Joined: Sat Sep 07, 2019 12:16 am

### Re: ICE Tables

It's usually because H2O is in excess, which means that we cancel it out, since there's no real change to it. I think Lavelle gave the analogy: If someone has one million dollars, and they give ten dollars to someone else, we don't say that they have \$999,990. We just say that they have about a million dollars, since they have money "in excess". I hope that helps.

Viviana Velasquez
Posts: 97
Joined: Sat Jul 20, 2019 12:15 am

### Re: ICE Tables

It's usually because it is in liquid form, but you only include H2O when it is aqueous or gas form.

kausalya_1k
Posts: 50
Joined: Wed Nov 14, 2018 12:23 am

### Re: ICE Tables

It's because H2O is usually provided in excess during experimental conditions. Also, since it's a liquid, it will have a concentration of 1 always.

Christine Honda 2I
Posts: 116
Joined: Sat Sep 14, 2019 12:17 am

### Re: ICE Tables

H2O is often not included because it is a liquid, or solvent in the solution. Therefore, it is not included in the K expression or in the ICE table.

Ashley Nguyen 2L
Posts: 103
Joined: Sat Aug 17, 2019 12:18 am
Been upvoted: 1 time

### Re: ICE Tables

H2O is usually not included in its liquid form because it has a concentration of 1 at all times.

Louise Lin 2B
Posts: 97
Joined: Sat Aug 17, 2019 12:15 am

### Re: ICE Tables

H2O isn't usually included because it is provided in excess in experiments, and is usually in liquid form. Liquid and solids are not supposed to be included in ICE tables.

Eesha Sohail 1D
Posts: 100
Joined: Sat Aug 17, 2019 12:16 am

### Re: ICE Tables

I understand the logic of the excess analogy, but how does the concept of chemical "activities" factor into this concept?

IScarvie 1E
Posts: 66
Joined: Sat Aug 17, 2019 12:16 am

### Re: ICE Tables

H2O is in excess, so the change in concentration is negligible

Nuoya Jiang
Posts: 99
Joined: Sat Sep 14, 2019 12:17 am

### Re: ICE Tables

Is it the same reason that we do not include it when we are calculating the equilibrium constant?

Jesse Anderson-Ramirez 3I
Posts: 54
Joined: Thu Sep 26, 2019 12:18 am

### Re: ICE Tables

H20 is not included when it is in liquid form.

Owen-Koetters-4I
Posts: 50
Joined: Fri Sep 28, 2018 12:16 am

### Re: ICE Tables

Oftentimes H2O is in excess. Also if it H2O were to be in liquid or solid form we wouldn't include it in the ICE table, as its activity would simply be 1.

SimranSangha4I
Posts: 99
Joined: Sat Sep 14, 2019 12:17 am

### Re: ICE Tables

H2O would have the concentration of 1 as well as it is normally in excess.

Nare Nazaryan 1F
Posts: 101
Joined: Fri Aug 09, 2019 12:17 am

### Re: ICE Tables

Because it's a liquid and because it's in excess (as a solvent), it is not included.