'Right, so when you put acid in with base, you get salt and water, and because of the indicator, it changes colour to pink, and thats a sign to stop adding base and measure the liquid levels...'
Titration/Volumetric Analysis, call it what you want, it's easy money...
Except if your Lab Assistant is a complete and utter Screw-up...
I had my practical exams on Friday, Chemistry is just plain simple, because board rules allow the use of the manual during the exam...sort of an Open-book test...
So I got a Titration experiment, find the normality, HCl, NaOH, Yada-Yada-Yada...The usual...
But what was just friggin unusual was when I emptied a burette-full of base into the acid and still couldn't see a color change...
I checked it, double checked it, then decided that it must be a problem with the indicator...I look at my Phenolptalein bottle, and see a piece of chalk floating around...
So I nicked myself another bottle, only to have the same result...
Then I realize that the dude had given me Acid in both beakers, some idiot had filled it into a beaker marked 'base' and then handed it to me, both are colourless, low concentration solutions, and look exactly the same...I go up to the teacher with this, and he doesn't believe me...
His test to see if I'm right? He puts it on his hand...
Yeah...no joke...apparently acid burns differently than base...I can't tell, myself, seeing that I never tried it...He seemingly has a lotta experience with such retarded behaviour...
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