What is the effect of temperature H3O on thr ionic product (kw) of water ? How will it concentration of H3O+ ions in the solution ????
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Answers
Answer:
Kw and pKw
The important equilibrium in water
Water molecules can function as both acids and bases. One water molecule (acting as a base) can accept a hydrogen ion from a second one (acting as an acid). This will be happening anywhere there is even a trace of water - it doesn't have to be pure.
A hydroxonium ion and a hydroxide ion are formed.
However, the hydroxonium ion is a very strong acid, and the hydroxide ion is a very strong base. As fast as they are formed, they react to produce water again.
The net effect is that an equilibrium is set up.
At any one time, there are incredibly small numbers of hydroxonium ions and hydroxide ions present. Further down this page, we shall calculate the concentration of hydroxonium ions present in pure water. It turns out to be 1.00 x 10-7 mol dm-3 at room temperature.
You may well find this equilibrium written in a simplified form:
This is OK provided you remember that H+(aq) actually refers to a hydroxonium ion.
