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Materials ●LabQuest●LabQuest App ●Vernier pH sensor●HCL, unknown concentration●.1 M NaOH solution●Pipet bulb or pump●250 mL beaker●Vernier drop counter●60 mL reagaent reservoir●5 mL pipet or graduated 10 mL pipet●100 mL beaker ●10 mL graduated cylinder ●Magnetic stirrer ●Wash bottle ●Distilled water●Ring stand●1 utility clampMethods To start the 60 mL reagent reservoir was attached to the ring stand using a utility clamp. It should be known that the bottom valve of the reservoir will be used to open and close the reservoir and the top valve is to adjust the flow rate. 250 mL of NaOH was filled into the reservoir to the tip while connecting the pH sensor to CH 1 to the LabQuest and the drop counter was lowered on the ring stand and connected in to DIG 1 to record the drops in millimeters. A 10 mL graduated cylinder was placed underneath the drop counter, and the reservoir was adjusted to drop once per second until the volume of NaOH solution in the graduated cylinder is between 9 and 10 mL. the number of drops was recorded,
and entered into the LabQuest to properly calibrate the device. The calibration was tested by repeating the process as before except the reservoir valve was closed once the volume reached between 6 and 7 mL and dividing the second value by the actual value in the LabQuest. That value was the conversion factor for the rest of the experiment. By using the pH sensor, the pH was identified and was observed