URGENT Titration terms help. (1 Viewer)

Mr_Kap

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I have to hand in a scientific report on a titration i performed.

I recently did a titration where i had an unknown concentration of NaOH which was put into the burette, and then there was a known concentration of HCL in the conical flask. There was also 3 drops phenolphthalein in the conical flask. We poured the NaOH in flask, until the solution in flask was at endpoint etc.... and then we found the value of conecntration NaOH.

Then we put the NaOH (of known concentration from previous part) into the burette again and we had vinegar and 3 drops phenolphthalein in the conical flask.
We wanted to find the amount of acetic acid in the vinegar so we poured in the NaOH until solution in flask reached endpoint. Then we found the concentration of acetic acid in vinegar.


1) What is/are the standard solution/s in this prac?

2) What is/are the primary standard/s in this prac?

3) Is this a Base-Acid titration or Acid-Base titration?
 
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InteGrand

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1) NaOH is the standard solution. See definition of 'standard solution': https://en.wikipedia.org/wiki/Standard_solution.

2) HCl was the primary standard, because this was of a known concentration and we used this to make a (secondary) standard solution of NaOH. (Useful definitions: http://goldbook.iupac.org/S05924.html)

3) I don't think there's a phrase 'base-acid' titration, it seems that 'acid-base' is always used.
 

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