Acid-base titration
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- Determine the unknown concentration from acid-base titration results:
A solution of KOH of unknown concentration was titrated by 0.3 M hydrochloric acid. The results below show the volume of HCl required to titrate 25cm3 of the KOH solution:
Run:
Titre volume (cm3)
1
18.60
2
18.35
3
18.40
- Use an acid-base titration to calculate percentage purity of a sample.
1.17g of sodium hydroxide pellets were used to make a 250mL solution of NaOH. 25.00 mL of this solution was titrated by 0.096 M HNO3, with an average titre of 27.75 mL.
Use this information to find the percentage purity of the sodium hydroxide sample.