Stoichiometric point

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Darlene Luu 1H
Posts: 50
Joined: Fri Sep 24, 2021 7:31 am

Stoichiometric point

Postby Darlene Luu 1H » Wed Dec 01, 2021 3:45 pm

What is stoichiometric point, and what does that show/explain?

Lynne Xu 3K
Posts: 102
Joined: Fri Sep 24, 2021 6:08 am

Re: Stoichiometric point

Postby Lynne Xu 3K » Wed Dec 01, 2021 3:48 pm

The stoichiometric point in a titration is when the moles of acid = moles of base.

tim_villasenor 1k
Posts: 101
Joined: Fri Sep 24, 2021 7:04 am

Re: Stoichiometric point

Postby tim_villasenor 1k » Wed Dec 01, 2021 4:00 pm

In class, the stoichiometric point (equivalence point) was at 7 because it was when the moles of a strong acid equaled the moles of a weak acid. What is cool is when there is a strong acid and a weak base is titrated in. Now, the equivalence point would be less than 7 because the acid is overpowering the weak base. I assume this is to come in 14B.

Daniel Tabibian 3K
Posts: 107
Joined: Fri Sep 24, 2021 5:02 am

Re: Stoichiometric point

Postby Daniel Tabibian 3K » Wed Dec 01, 2021 8:07 pm

The stoichiometric point is where the moles of acid match the moles of base in the solution. This would be when the pH hits 7, but the pH may differ after that depending on the nature of the salt that is formed.

Aida Fraser 2I
Posts: 61
Joined: Fri Sep 24, 2021 5:32 am

Re: Stoichiometric point

Postby Aida Fraser 2I » Thu Dec 02, 2021 11:43 am

Can someone help me with this problem?
For the following titration, predict the pH (= 7, < 7, > 7) at the stoichiometric point. Justify your answer by writing chemical equation(s) or using words.
Pyridine (C5H5N) and HCl

Aida Fraser 2I
Posts: 61
Joined: Fri Sep 24, 2021 5:32 am

Re: Stoichiometric point

Postby Aida Fraser 2I » Thu Dec 02, 2021 11:56 am

Is the stoichiometric point achieved by neutralization?

Brooke Gushiken 1B
Posts: 101
Joined: Fri Sep 24, 2021 6:48 am

Re: Stoichiometric point

Postby Brooke Gushiken 1B » Thu Dec 02, 2021 3:21 pm

The stoichiometric point occurs during a titration, and it's the point at which the moles of acid = moles of base in the solution. Since this means the acid and base are completely neutralized, the pH will be 7 at the stoichiometric point as well.


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