Titration Curves

[Carolina Gomez 2G]

What do titration curves represent and what is the significance of the stoichiometric point?

[keely_bales_1f]

I believe that Professor Lavelle will go into more detail about titrations in Chem 14B. But based on the last lecture in 14A, the graph he depicted was a titration curve. It showed us the volume of the titrant on the x-axis and the pH on the y-axis. This graph also tells us the stoichiometric or equivalent point. Hope this helped!

[Simrah_Ahmed1J]

Titration curves basically show the different volumes of an acid, or the titrant, being added to to the concentration of base in the solution. In a graph, you have volume of acid on the x-axis and pH on the y-axis.
The significance of the stoichiometric point is that it shows the amount of added titrant necessary for the concentration (think moles) of acid to equal exactly the concentration of base in solution. At that point it is similar to salts in water, with dissociated ions.
When you have ions coming from strong acids and bases, they are going to be completely dissociated and neurtal. Therefore, that exact same concentration of acid and base makes the pH=7, or neutral.
This is why you have volume of acid on the x-axis and pH on the y-axis. Then, the point at which pH=7 is often the stoichiometric point.