Titration+of+Vinegar+-+Titration+Time

9) Remove the cap from the pH probe containing the electrolyte solution. 10) Rinse the pH probe with deionized water over your sink. 11) Insert the pH probe through the electrode support or drop counter so that the entire glass bulb is sumberged in the vinegar. 12) Plug the pH probe into a USB port in your computer. 13) Launch Logger Pro. Check to see that the pH reading is below 7 14) Set the time interval for data collection to 5 minutes (300 seconds) and the sampling rate to 1 sample every second. ( In Logger Pro : Experiment Menu > Data Collection).


 * Let the titration begin!**

15) Click the Collect button in Logger Pro 16) Open the valve and allow NaOH to drain into the vinegar, allowing it to go quickly at first. Make sure to turn on the stirring or swirl the beaker gently to allow the acid and base to mix and react quickly. 17) When you notice the pink color takes longer to disappear, slow down the flow of NaOH. Continue to slowly add NaOH, eventually dropwise, until you reach the point that one drop causes the color to change to pink and remain pink (it doesn't have to be dark).

RECORD THE VOLUME ON THE BURET IN YOUR DATA TABLE WHEN THE COLOR CHANGE TO PINK PERSISTS

18) Wait a few seconds so a small horizontal mark appears on the graph, and continue to add NaOH slowly, dropwise at first, until the graph levels out. 19) Click the Stop Button in Logger Pro. 20) Remove the pH probe from the titration solution, rinse over the sink with deionized water, and put the electrolyte solution cap back on the end.

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