OKay I learned in class that equivalence point is the moment of neutralization, wbelow the # of moles of acids and base current is in equivalence/very same amount.

Now I was also told that Half equivalence point is when = , the concentration of a weak acid = concentration of conjugate base.

You are watching: Difference between half equivalence point and equivalence point

Problem: I"m acquiring a little bit confused as to the distinctions. I"ve check out around and am finding interpretations that don"t really melted any kind of light on the differences in between them. What is the distinction in between a fifty percent equivalence and an equivalence point?

Based on what i have actually been told, they sound the same to me.


acid-base ph titration
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asked Feb 23 "20 at 3:32
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MERcurialKGMERcurialKG
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The equivalence point is wbelow the amount of moles of acid and also base are equal, resulting a solution of only salt and also water. If you are titrating an acid against a base, the half equivalence suggest will certainly be the point at which half the acid has been neutralised by the base. For instance, if you have 1 mole of acid and also you add 0.5 mole of base, specifically half of the acid will certainly have actually been neutralised. The solution staying will be half salt and half acid.


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edited Apr 25 "20 at 10:56
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Karsten Theis
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answered Feb 23 "20 at 16:42
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Now I was also told that Half equivalence suggest is as soon as = , the concentration of a weak acid = concentration of conjugate base.

That is correct. You make the weak acid in situ as soon as you titprice a weak base through a strong acid, or as soon as you titrate a weak acid through a strong base. At the fifty percent equivalence suggest, the pH is about equal to the pKa of the weak acid.

What is the difference between a half equivalence and also an equivalence point?

The equivalence suggest is what it constantly is. The point once you added stoichiometric amounts of titrant to the analyte. In the weak acid / strong base situation, it suggests that you have quantitatively turned the weak acid right into weak base, and don"t have any kind of excess of solid base (all was neutralized). The pH would certainly be that of the weak base. In the weak base / solid acid instance, it suggests that you have actually quantitatively turned the weak base right into weak acid, and do not have actually any kind of excess of strong acid (all was neutralized). The pH would certainly be that of the weak acid.

Based on what i have been told, they sound the exact same to me.

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Compared to the equivalence suggest, you have to include fifty percent the titrant to reach the fifty percent equivalence point, so they are various.