Write your procedure out before setting up your experiment. You can make changes to it if need be. Use the 0.1M NaOH standard solution as your titrant. This pre-made stock solution can be found in the Strong Bases Supply Closet. Use a 50 mL burette to dispense the titrant into the Erlenmeyer flask containing the unknown acid. Accurately tack the addition of the titrant and record how the pH changes as its added. When you click on the Unknown Acid Flask, the pH meter is found in the bottom right. The table below will help guide you here. Since we dont know what time of acid this is (weak or strong) we will need a titration curve to determine the equivalence point. Pay attention to sig figs when recording data. Complete at least 3 trials.

ANALYSIS QUESTIONS 1. Create a sample titration curve from your best data set. 2. Is the unknown acid a strong acid or a weak acid? How do you know? 3. What is the concentration of the unknown acid solution? Support your answer with calculations. 4. What is the Ka of the unknown acid? Support your answer with calculations. 5. List 3 indicators which could have been used for this titration.

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