## Water in Acid-Base Equilibria

J_CHEN 4I
Posts: 54
Joined: Tue Nov 14, 2017 3:01 am

### Water in Acid-Base Equilibria

In lecture, the professor went over a question involving the reaction $CH_{3}COOH(aq) + H_{2}O(l)\leftrightharpoons CHCOO^{-}(aq) + H_{3}O^{+}(aq)$ and used the ICE table. Why is the intial value of H2O zero and not 10-7?

Asha Agarwal 1E
Posts: 51
Joined: Fri Aug 30, 2019 12:16 am

### Re: Water in Acid-Base Equilibria

Water is in such large excess and is the liquid solvent that it is not included in the ICE table at all as it does not effect Ka.

RichBollini4G
Posts: 100
Joined: Wed Sep 18, 2019 12:18 am

### Re: Water in Acid-Base Equilibria

J_CHEN 4I wrote:In lecture, the professor went over a question involving the reaction $CH_{3}COOH(aq) + H_{2}O(l)\leftrightharpoons CHCOO^{-}(aq) + H_{3}O^{+}(aq)$ and used the ICE table. Why is the intial value of H2O zero and not 10-7?

liquids such as water are not included in calculations for Ka or Kb so its not included in the ICE table.

Maya Pakulski 1D
Posts: 105
Joined: Thu Jul 11, 2019 12:17 am

### Re: Water in Acid-Base Equilibria

Liquids and pure solids are never included in equilibrium calculations.