One extra drop of titrant was all it took…
That day, I entered the lab like I always did. I put on my lab coat, wore my goggles, and slipped on my gloves. I checked the equipment on my desk: Erlenmeyer flask, burette, beaker, indicator and, of course, the titrant solution. I had read the titration procedure multiple times. Everything felt under control. I carefully set up the burette, prepared the solutions and started the experiment. Everything was going smoothly – until that final moment.