12-24-2025, 10:20 AM
I'm a second-year chemistry student, and while I understand the theory behind acid-base titration, my practical results in the lab are consistently inconsistent, with my calculated molarities varying significantly from the expected values. I'm meticulous with my measurements and technique, but I think my endpoint determination might be off, especially with indicators like phenolphthalein where the color change can be subtle. For those who have mastered this fundamental technique, what are the most common sources of error you've identified beyond the obvious, and what specific steps do you take to ensure precision, from preparing your burette and standard solution to judging the exact moment of equivalence? Are there any particular tips for dealing with weak acid-strong base or strong acid-weak base titrations that are trickier than the standard strong-strong?