This is Experiment 5, pH titration, Vesita G acid with sodium carbonyl and calibrating the pH tester. I've got my pH tester right here. I'm going to turn it on. I'm going to put it into a rinse distilled water. Always a good idea before you put it into any solution. I'm only putting it into this level right here, which is all I can go right now. This is distilled water. Then give it all a shake to rinse off any extra water. Not too violent. Keep any extra water coming off. Now I'm going to place it into my pH 6.86 solution. Don't know if you can see that. It's close to 6.86, but not exactly. Again, only putting it into the solution up to the level where the cap covers. Now I'm going to turn it around so I can get the calibration bottom for two seconds. It starts blinking with 6.86. Then it says end. I know that I'm done. I shake off that solution back in there. Rinse off my pH electrode. You can probably rinse with the same distilled water for most of a lab. I don't know. I tend to dip it in 10 or 20 times. Now I'm going to put it into the pH 4.01. It's good to see the recalibrating. Give it all a swirl of 5 to 10 seconds. It says 3.5. I'm going to calibrate it now by holding it down for two seconds. It recognizes this as 4.01. By the time I turn it around, it's ended and it's done. My calibration is complete. Then I rinse it with distilled water. I'm ready to do the rest of the experiment. My pH tester is calibrated for the rest of the semester.