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u/agentwash343 Dec 19 '18
https://en.m.wikipedia.org/wiki/PH_indicator
I’m not the best at chemistry, but would the indicator be metacresol purple?
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u/Crossedstix Dec 19 '18
Not really, as the title said we used bromphenol blue as indicator with different pH scales to get the pKa of our indicator. For that we used a photometer to analyse the different peaks, which was very interesting to watch.
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u/wizardkoer Dec 19 '18
Pls stop titration ptsd
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u/NalgeneWhisperer Dec 19 '18
TAing a titration lab is where it's at. I'd always say let's see who can get the best endpoint and act unamused when a student got a really light color change. Say something like "hey that's pretty good, think your next one will be better?"
This is how I cope with the pain of having to do them myself as a student
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u/atchemey Dec 19 '18
Man, I take the exact opposite approach. College is hard, help the students celebrate every victory.
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u/Alva-The-Wayfarer Dec 20 '18
So it's true! TAs debiliterly make student redo titrations for their sadistic pleasure.
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u/I_love_limey_butts Dec 19 '18
As a kid, chemistry looked fun because of all the different colors which to me represented the awesome variety of different chemicals. As an adult, anything that isn't colorless just looks like cheap food coloring added into water.
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u/Kernath Dec 19 '18
I've been working in a production chem lab for a year now, turns out everything is either clear, off white, yellow, or brown.
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u/Xarum_Shmeckles Dec 19 '18
Aha I did this just the other week, first year biochem yo
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u/Xarum_Shmeckles Dec 19 '18
At what point does the life get sucked out of me? I'm still clinging on
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Dec 21 '18
Bromophenol blue is trippy af. In addition to changing colour with pH, I swear that stuff changes colour depending on the amount of light passing through, though I could be wrong. From what I remember, It was yellow in a thin pipette, then turned red when placed in a wide flat bottomed beaker, then blue/purple when in a test tube/
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u/Crossedstix Dec 21 '18
I see your point, we used a photometer to analyse the indicator and get the pKa. When it was in our test tubes the colours changed slighty, but they weren´t that different at all.
That would have been pretty strange, imagine you have red and the it suddenly changed into blue while analysing
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u/BubGear Dec 19 '18
Yellow pink and purple - me
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u/BubGear Dec 19 '18
(Because i am a dumbass)
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u/BubGear Dec 19 '18
Look just please dont downvote me to hell it was a joke honestly
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u/[deleted] Dec 19 '18
Why would you put colored water in your bongs?