A titration experiment was performed to determine the concentration of sulfuric acid using a known concentration of potassium hydroxide. 100 mL of sulfuric acid was placed in a conical flask and a few drops of phenolphthalein indicator were added. A 0.6 M solution of potassium hydroxide was then slowly added into the conical flask. The amount of potassium hydroxide added and any observations were recorded.
|Volume of Added (mL)||35.4||35.6||35.8||36.0||36.2||36.4||36.6||36.8||37.0||37.2||37.4||37.6|
|Observations||Colorless||Colorless||Colorless||Pink color that fades quickly to colorless||Pink color that fades quickly to colorless||Pink color that fades slowly to colorless||Pink color that fades slowly to colorless||Pink color that lasts ~30 seconds||Pink||Pink||Pink||Pink|
At what volume was the end point of the reaction reached?
What was the concentration of the sulfuric acid? Give your answer to 3 decimal places.