bleistift2@sopuli.xyz
on 06 Feb 20:08
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What a high it was when I did titration in high school and managed to get so close that the liquid appeared colorless unless you held a white sheet of paper next to it.
It was tinted, but just barely.
MajorMajormajormajor@lemmy.ca
on 06 Feb 20:31
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The chosen one!
sem@lemmy.blahaj.zone
on 06 Feb 23:58
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I did this once too I was using half drops with a DI water squirter to rinse them into solution
Lemminary@lemmy.world
on 07 Feb 22:54
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Same, but my professor said I needed to keep titrating and that it needed to be a very specific light pink which she never bothered to specify in the entire semester. đ
randint@lemmy.frozeninferno.xyz
on 08 Feb 09:24
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I also managed to did that once, but after a while (20 seconds or so) the color started to fade and we had to add more, and overshooting miserably
Tar_alcaran@sh.itjust.works
on 06 Feb 20:10
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Micropipettes ftw!
BreadOven@lemmy.world
on 07 Feb 21:56
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What about for a 20+ mL titration? Also how would you quantify the exact volume for the endpoint if itâs when the plunger is half depressed?
Quantitative analysis flashbacks form this, I learned the fastest way to figure out how much reactant you need to figure out the tipping point of the ph was to just run quickly adding large jumps of aloquates on the first attempt ,let it turn dark, then on the next one go ahead and add a safe amount of reactant I found from the first attempt then go super slow with the drip rate after. Was pretty consistently one of the first to leave lab
introvertcatto@lemmy.blahaj.zone
on 06 Feb 20:55
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Honestly titration in hs made me not like chemistry. Still think itâs fun to do improvised metal plating with a battery and some salt water though
GrammarPolice@lemmy.world
on 07 Feb 08:07
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I still donât know what titration was about. Only that the solution was supposed to either turn pink or orange in some casesđđ
wolframhydroxide@sh.itjust.works
on 08 Feb 02:07
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Suppose you are trying to determine the concentration of a solution. You could try to boil off the water and figure out how much solid stuff is left over, but what if itâs a mixture, and you just want to know how much, for instance, âHydrochloric Acidâ is in the water. Or, alternatively, some chemicals (such as Hydrochloric acid) evaporate with the water. We need a way to figure out the concentration of this chemical ( weâll call it âChemical Xâ) without trying to pull it out of the solution.
So, you need to know how much Chemical X is in your solution, but you canât really easily separate it from the solution. What do you do? You Titrate! You find some other chemical that reacts with Chemical X, so that this new chemical (which we will call Chemical Y) will get instantly destroyed as long as there is still more Chemical X in solution. So, as long as there is more Chemical X in solution, the Chemical Y will get eaten up instantaneously, reacting with Chemical Y.
Finally, you just need to have some way of detecting whether any Chemical Y exists in the solution, since the moment you see it in solution, you know thereâs no more Chemical X to eat it up.
Now, you titrate: take a specific volume of your sample solution, and add a known concentration of Chemical Y, drop by drop. Once there is any chemical Y left over, you know you have found how much Chemical X was in the solution to start. Congratulations, you now know the concentration of Chemical X in the sample solution.
GrammarPolice@lemmy.world
on 08 Feb 08:54
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Thanks, but Iâm now past the point where this info is useful to me. If this came 3 years ago thoughâŚ
captainlezbian@lemmy.world
on 08 Feb 20:20
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Knowledge always has the capacity to become useful again at some point
i may just have had bad teachers but i to this day have no idea what chemistry at pre-university level were supposed to teach. the labs were all about watching things change, with no explanation as to why. and the theory parts were all about balancing reactions. none of it connected.
fossilesque@mander.xyz
on 07 Feb 08:57
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You ought to get the balance right for things to change the way you like.
Titration is a great example of using the inverse. You get the colour by creating the balance. Then you can calculate the unknown side from the balance with the known side.
Now you can use the knowledge that your your base/acid is of a certain concentration to get the reaction you want to do right.
As for the specifics, once you get to organic chemistry in Uni it doesnt connect to make sense either, unless you really dive into the deep end of it.
iâm saying i donât understand the reply in the context of what i wrote. it may be a difference in terminology, but when i said âbalance reactionsâ i was talking purely about on paper. we got a bunch of formulas and were to fill in the result like a multiplication table. i donât know if iâve ever had to do that in practice. labs were always just ân moles of chemical a, n moles of chemical b, observe the precipitationâ over and over again. it was only years after school that i realized that precipitation occurs when a solution is saturated.
isolatedscotch@discuss.tchncs.de
on 08 Feb 13:07
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Yup, luckily in my case I got into amateur chemistry (tysm sciencemadness) but it pained me to see my friends not actually knowing anything and just memorizing everything by the letter
0101100101@programming.dev
on 08 Feb 18:51
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amateur chemistry
So⌠cooking meth?
isolatedscotch@discuss.tchncs.de
on 08 Feb 20:09
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nah, thatâs generally frowned upon among the people who do chemistry at home both because itâs not economically viable, will get you in jail and it may cause further restrictions on chemicals, which nobody wants or needs
I mostly do energetics/explosives on a small scale and the occasional organic synthesis
if you want, thereâs an amazing yt channel called Explosions&Fire which perfectly encapsulates the whole spirit of doing chemistry in your shed
Very similar to my experience. It was even worse for organic chemistry where they just parroted out the outcomes/mechanisms with not much explanation. But maybe itâs also difficult to explain chemistry without some solid physics prerequisites
Fredthefishlord@lemmy.blahaj.zone
on 08 Feb 19:30
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AP chem courses had some small value. Frankly I think all of chemistry throughout all years of school would be better taught as a crash course in a year in Middle school, with a refresher in highschool⌠Then teach more bio instead, itâs more valuable to the everyman
captainlezbian@lemmy.world
on 08 Feb 20:14
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My high school chemistry teacher was a professional chemist working as a teacher so sheâd be home when her kids got home, and yeah I think I had a different experience. Several of our labs were more thermodynamics related. One was to create a temperature based can crushing method. But yeah sheâd ask us what we thought would happen and tell us to go figure out. That said we did have the âlearn to titrateâ labs too, but we were told thatâs what was happening.
my first chemistry lab (like actual chemistry, rather than as part of the âsciencesâ subject) involved us mixing three components we were not given the names of in a test tube, then we would go out to the school yard and while we were holding the test tubes with tongs the teacher shoved a match into each of them to show the efficacy of the black powder we had just unknowingly made. there was so much glass everywhere.
like, it was cool, but i donât think anybody learned anything from that other than how to make black powder, which i imagine most people with a dad learn at one point or another.
(Intro)
This speech is my recital, I think itâs very vital
To get it right, the endpointâs whiteâ
Titrate! Titrate! Here we go!
(Chorus)
Itâs tricky to turn it white, to turn it white would be real tight
Letâs titrate! Titrate! Titrate! Titrate!
Itâs tricky to turn it white, to turn it white would be real tight
Titrate! T-t-t-titrate! Titrate!
(Verse 1)
I set up in the lab, a burette in my hand
A flask of acid, now add the base, itâs goinâ just as planned
But if I go too far, then I will lose my star
So I drop it slow, watch it flow, âtil the pink is out that dohâ!
(Chorus)
Itâs tricky to turn it white, to turn it white would be real tight
Lets titrate! Titrate! Titrate! Titrate!
Itâs tricky to turn it white, to turn it white would be real tight
Titrate! T-t-t-titrate! Titrate!
(Verse 2)
In the lab, we gotta grab
some phenolphthalein
One drop too much, the shade will clutch, and wreck the whole routine!
The pH curve is steeper when youâre near that equivalence point
So add it slowâjust one more drop moâ,
and then weâre out this joint!
(Chorus)
Itâs tricky to turn it white, to turn it white would be real tight
Letâs titrate! Titrate! Titrate! Titrate!
Itâs tricky to turn it white, to turn it white would be real tight
Titrate! T-t-t-titrate! Titrate! Titrate!
(Outro)
We donât quit, yâall, keep that pipette
Keep on drop-drop-drippinâ
'Cause this is it!
threaded - newest
What a high it was when I did titration in high school and managed to get so close that the liquid appeared colorless unless you held a white sheet of paper next to it.
It was tinted, but just barely.
The chosen one!
I did this once too I was using half drops with a DI water squirter to rinse them into solution
Same, but my professor said I needed to keep titrating and that it needed to be a very specific light pink which she never bothered to specify in the entire semester. đ
I also managed to did that once, but after a while (20 seconds or so) the color started to fade and we had to add more, and overshooting miserably
Micropipettes ftw!
What about for a 20+ mL titration? Also how would you quantify the exact volume for the endpoint if itâs when the plunger is half depressed?
using mouth pipettes for dimethylmercury
To quote an old teacher âa little benzene never killed anyone, and itâs great for cleaning lab tablesâ
Turned out that actually, he was half right.
hplc ftw
Quantitative analysis flashbacks form this, I learned the fastest way to figure out how much reactant you need to figure out the tipping point of the ph was to just run quickly adding large jumps of aloquates on the first attempt ,let it turn dark, then on the next one go ahead and add a safe amount of reactant I found from the first attempt then go super slow with the drip rate after. Was pretty consistently one of the first to leave lab
Its not really hard how boring it is.
Honestly titration in hs made me not like chemistry. Still think itâs fun to do improvised metal plating with a battery and some salt water though
I still donât know what titration was about. Only that the solution was supposed to either turn pink or orange in some casesđđ
Suppose you are trying to determine the concentration of a solution. You could try to boil off the water and figure out how much solid stuff is left over, but what if itâs a mixture, and you just want to know how much, for instance, âHydrochloric Acidâ is in the water. Or, alternatively, some chemicals (such as Hydrochloric acid) evaporate with the water. We need a way to figure out the concentration of this chemical ( weâll call it âChemical Xâ) without trying to pull it out of the solution.
So, you need to know how much Chemical X is in your solution, but you canât really easily separate it from the solution. What do you do? You Titrate! You find some other chemical that reacts with Chemical X, so that this new chemical (which we will call Chemical Y) will get instantly destroyed as long as there is still more Chemical X in solution. So, as long as there is more Chemical X in solution, the Chemical Y will get eaten up instantaneously, reacting with Chemical Y.
Finally, you just need to have some way of detecting whether any Chemical Y exists in the solution, since the moment you see it in solution, you know thereâs no more Chemical X to eat it up.
Now, you titrate: take a specific volume of your sample solution, and add a known concentration of Chemical Y, drop by drop. Once there is any chemical Y left over, you know you have found how much Chemical X was in the solution to start. Congratulations, you now know the concentration of Chemical X in the sample solution.
Thanks, but Iâm now past the point where this info is useful to me. If this came 3 years ago thoughâŚ
Knowledge always has the capacity to become useful again at some point
i may just have had bad teachers but i to this day have no idea what chemistry at pre-university level were supposed to teach. the labs were all about watching things change, with no explanation as to why. and the theory parts were all about balancing reactions. none of it connected.
Yea, this articulates my experience as well.
.
You ought to get the balance right for things to change the way you like.
Titration is a great example of using the inverse. You get the colour by creating the balance. Then you can calculate the unknown side from the balance with the known side.
Now you can use the knowledge that your your base/acid is of a certain concentration to get the reaction you want to do right.
As for the specifics, once you get to organic chemistry in Uni it doesnt connect to make sense either, unless you really dive into the deep end of it.
i donât understand this reply.
You know how old scales worked by putting weights you know on one side, until things got balanced with the weight of the item you want to measure?
You do the same, but with acid and base, where you know the âweightâ of one side of it.
iâm saying i donât understand the reply in the context of what i wrote. it may be a difference in terminology, but when i said âbalance reactionsâ i was talking purely about on paper. we got a bunch of formulas and were to fill in the result like a multiplication table. i donât know if iâve ever had to do that in practice. labs were always just ân moles of chemical a, n moles of chemical b, observe the precipitationâ over and over again. it was only years after school that i realized that precipitation occurs when a solution is saturated.
Yup, luckily in my case I got into amateur chemistry (tysm sciencemadness) but it pained me to see my friends not actually knowing anything and just memorizing everything by the letter
So⌠cooking meth?
nah, thatâs generally frowned upon among the people who do chemistry at home both because itâs not economically viable, will get you in jail and it may cause further restrictions on chemicals, which nobody wants or needs
I mostly do energetics/explosives on a small scale and the occasional organic synthesis
if you want, thereâs an amazing yt channel called Explosions&Fire which perfectly encapsulates the whole spirit of doing chemistry in your shed
Very similar to my experience. It was even worse for organic chemistry where they just parroted out the outcomes/mechanisms with not much explanation. But maybe itâs also difficult to explain chemistry without some solid physics prerequisites
AP chem courses had some small value. Frankly I think all of chemistry throughout all years of school would be better taught as a crash course in a year in Middle school, with a refresher in highschool⌠Then teach more bio instead, itâs more valuable to the everyman
My high school chemistry teacher was a professional chemist working as a teacher so sheâd be home when her kids got home, and yeah I think I had a different experience. Several of our labs were more thermodynamics related. One was to create a temperature based can crushing method. But yeah sheâd ask us what we thought would happen and tell us to go figure out. That said we did have the âlearn to titrateâ labs too, but we were told thatâs what was happening.
my first chemistry lab (like actual chemistry, rather than as part of the âsciencesâ subject) involved us mixing three components we were not given the names of in a test tube, then we would go out to the school yard and while we were holding the test tubes with tongs the teacher shoved a match into each of them to show the efficacy of the black powder we had just unknowingly made. there was so much glass everywhere.
like, it was cool, but i donât think anybody learned anything from that other than how to make black powder, which i imagine most people with a dad learn at one point or another.
(Intro) This speech is my recital, I think itâs very vital To get it right, the endpointâs whiteâ Titrate! Titrate! Here we go!
(Chorus) Itâs tricky to turn it white, to turn it white would be real tight Letâs titrate! Titrate! Titrate! Titrate! Itâs tricky to turn it white, to turn it white would be real tight Titrate! T-t-t-titrate! Titrate!
(Verse 1) I set up in the lab, a burette in my hand A flask of acid, now add the base, itâs goinâ just as planned But if I go too far, then I will lose my star So I drop it slow, watch it flow, âtil the pink is out that dohâ!
(Chorus) Itâs tricky to turn it white, to turn it white would be real tight Lets titrate! Titrate! Titrate! Titrate! Itâs tricky to turn it white, to turn it white would be real tight Titrate! T-t-t-titrate! Titrate!
(Verse 2) In the lab, we gotta grab some phenolphthalein One drop too much, the shade will clutch, and wreck the whole routine! The pH curve is steeper when youâre near that equivalence point So add it slowâjust one more drop moâ, and then weâre out this joint!
(Chorus) Itâs tricky to turn it white, to turn it white would be real tight Letâs titrate! Titrate! Titrate! Titrate! Itâs tricky to turn it white, to turn it white would be real tight Titrate! T-t-t-titrate! Titrate! Titrate!
(Outro) We donât quit, yâall, keep that pipette Keep on drop-drop-drippinâ 'Cause this is it!
Glorious
Reverse titration?