Question

Neutralization understanding:
We have a TITRATION lab, with Acetic Acid, NaOH, and HCl
First we're titrating the Acetic Acid, but I need some understanding:
"Calculate the Equivalence point when 50.0 mL of 0.10M Acetic Acid is neutralized by 0.10 M NaOH"

On that problem

Answer 1

Find But some of my classmates keep on telling me that the equivalence point IS the Neutralization point, but I don't understand: Acetic Acid is a weak acid, and the Molarity and the Volume of the NaOH and Acetic Acid are both equal, therefore their moles are equal. SO if their moles are equal... and Acetic Acid will dissolve in few quantity, and give off less H+, how is it neutralized? At that point, won't there be way more OH- than H+? In fact, all of the H+ will be consumed and the solution would be basic and pH will be higher than 7! Am I missing something here about Neutralization Reactions and Equivalence point or something else? Please help!

Answer 2

Hey, do me a favor. Next time you have a titration lab, mix HNO3 and HCL at a ratio of 1:3. Your teacher will give you an A @iPwnBunnies

Answer 3

@happytales so it produces something that will melt gold? Well, I have no gold coins and my teacher is only grading us on the lab... I dunno how he would be giving me a random A.

ALso, I kind of figured it out?? Equivalence point is just the stoichimetric ratio, but what about Neutralization???

Answer 4

While thinking of an acid base reaction,you dont have to consider whether the acid is strong or not, it will react completely to form the salt.Its the salt which reacts with water to create H+ OR OH- ions, which determine pH.

And the question might be "calculate the pH at equivalence point" because equivalence point is not a number or ratio- equivalence point is when the acid and base completely reacted.

Answer 5

It's a joke lololol. And I doubt a high school would have concentrate nitric n hydrochloric acid to create royal water.

Answer 6

@ sre Well... That uh, I dunno. The wyould react completel? how would they do that though if the weawk acid doesn't ionize?? Isn't it the Water that dissolves the acid and bases??

Answer 7

Good question ... think of it like this, the weak acid dissociated a little and produced H+ ions.But there are OH- ions in the solution too - formed by the dissociation of base.These two ions will react forming H2O and now both the ions(H+ AND OH-) are no longer there, so the salt will dissociate further to produce H+ ...why ? because according to the equilibrium constant, there will always be an equilibrium between acid and its conjugate base, IF H+ ions are consumed ,the acid will dissociate more making more H+ to maintain equilibrium.

Answer 8

it is something to do with the Pka values of indicator when change in color shows the end of the reaction before it should stop :P