Question

1. In Part C of this lab, which of the following pieces of glassware is used to accurately deliver 10.00 ml of acetic acid into your Erlenmeyer flask? O a. Volumetric pipet. b. Disposable pipet. c. Graduated cylinder. 2. What is the purpose of a titration thief? a. To hold a few milliliters of the analyte in case you overshoot the endpoint. b. To hold a few milliliters of the titrant in case you overshoot the endpoint. c. To use as an indicator when you have reached the equivalence point. 3. What is the proper method for disposing of excess KHP at the end of the lab? a. Place it into the proper waste container in the hood. b. Place it back into the reagent bottle for others to use. O c. Pour it down the drain with copious amounts of water.
need help with question 2

Answer 1

In Titration Thief method , Thief is actually an eyedropper.

In this method we take 0.5ml of the solution to be titrated out of the vessel with the eyedropper. Then titrate the remaining solution to the end point. Then the solution inside the eyedropper will be added to the vessel, which will change the indicator color back to that prior to the end point. After that we can titrate the total vessel contents to the final point.

By doing this we will reduce the chance of error in the end point.