12. Check that the vertical axis has pll scaled from o to 14 plH units. The hor
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12. Check that the vertical axis has pll scaled from o to 14 plH units. The hor eter window shows a pH value between 1.8 and 3.2 3 Turn on the stirring to a medium speed 14. Before adding NaOH titrant, click the green IP Coebutton and monitor pH for 5-10 seconds IS Once te displayed pH reading has stabilized click the blue wheel like Reee button. 16. In the edit box that pops type scaled from 0 to 25 ml. Check to see that the M eN periments up, lype o" (ior O ml. added) Press the ENTER key to store the first data to begin the titration. This process goes faster if one person mani person operates the computer. Others take turns to read the BURET LEVEL pair for this experiment manipulates the buret, ousre now ready 17. You are now while another 18. Position the buret over the beaker of HCI 19. Add some NaOH titrant (enough to raise the pll about o. 20. When the pH stabilizes, again click In the edit box, type the current buret data pair for the experiment the nearest 0.01 ml. PresS ENTER You have now saved the seco Remember that the buret volume is read in a TOP TO BoTTOM direction. buret reading in the edit box after each increment. When a pH value of approximately 3.5 pH units is reached, change to a ONE-DROP 21. Continue adding NaOH solution in increments that raise the phl by about 0.15 units and enter t 22. INCREMENT. Enter a new buret reading after each drop has been added Be watchful for when the pink color appears permanently. Note down the pH 23. volume , when the permanent color change happens. 24 After a pH value of approximately 10 is reached, again add larger increments that raise the pH by about 0.15 pH units, and enter the buret level after each increment. 25. Continue adding NaOH solution until the pH value remains constant. (S-shape graph is symmetric 26. When you have finished collecting data, clicktp an be su 27. Stop the stirring, DONOT DUMP THE CONTENTS of the beaker YET! to save the file. 28. Use the "magnetic wand aka magnetie picker-upper" from the teacher to pick the stirrer bar (th white magnetic pill) out of the beaker 29. Return the stirrer bar (white pill) and the wand to the front table. 30. Dispose the contents of the beaker in the sink and thoroughly wash the beaker Screw on the white plastic bottle that protects the pH probe 32. Save the results and the graph. Share it with you team members. 33, ANYOURS TATIONRETURNMATERIALS WASHYOURHANDSExplanation / Answer
12. Check that the vertical axis has pll scaled from o to 14 plH units. The hor
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