Equipment:

- Data collection system

- pH sensor

- Micro stir bar

- Magnetic stirrer (3)

- Ring stand

- Graduated pipet with rubber bulb, 25-mL

- Beaker (2), 100-mL

- Beaker (2), 25-mL

- Anti-Acid Pills

- Erlenmeyer flask (3), 250-mL

- Hot plate 

- Hydrochloric acid, 0.1 M, 70 mL

- Clamp, right-angle

- Sodium hydroxide (NaOH), standardized by student in previous activity, 100 mL

- Buffers, pH 4 and pH 10, 10 mL

- Deionized water, 100 mL

- Wash bottle with deionized water

- Kim wipes

- Titration jar (3), 240-mL

- Automatic titrator

- Volumetric flask, 1-L

- Plastic bottle, 1-L

- Mortar

Procedure:

1. Start recording data

2. Press the "Run" button on the Titrator to start the titration

3. Continue the titration past the equivalence point until the pH curve flattens

4. Stop recording data

5. Repeat the titration procedure with two more HCl samples. Record the mass of the samples.

6. Save your experiment and print the graph

7. Clean the syringe in the Titrator clean up according to your teacher's instructions