Emergency Chemistry Question

[UrganNagru]

I apologise think i divided instead of multiplying or something along those line, repeated it and got the same as you 0.03, think that a different concentrations might be a good idea to make volume more significant, in which case the of values will all need changing except for volume of acid. Again sorry about that, would stick around and redo it but in need of some kip. Good luck.

 

[Tilda]

Thanks everybody for your help,

We remembered that the 0.03 was in dm^3 and so the volume was quite nice.
Found in her notes that she was being "given" a 250cm^3 flask from which to do 10 titrations and so it all started to fit together nicley. Presumably she "makes up" 250ml acid sol. and then pippettes 10 lots of 25ml
Sorted. Thanks everybody who helped, especially crispy and UrganNagru! If you ever get stuck on law homework () gimmie a yell!

T.

 

[Succi]

pretty sure your meant to get told exactly what to do for a-level coursework

My teachers always gave as much help/direction as they could, due to the grades reflecting back on them

 

[Amildin]

Tilda i did this pretty much same experiment with different chemicals, i can send you my copy via pm if you like, just as something to work from and to see an easy way of setting it out.

For some very useful tips there are forums out there where students all go to talk about the chemistry and biology coursework. And you DO have to work backwards, otherwise your using trial and error which is just silly.

 

[tris-]

seems you got it sussed here tilda.

good job, because titration isnt my strong point

 

[Tilda]

She went to school and asked the teacher about the circular part (ie, you can work out mass if you guess and use 118 RMM, or you can work out 118 if you know the mass, but you're given neither and so you have to guess one or the other) and she said yes she expected people to work backwards from the 118, so its all groovy.

Thanks everybody!

 

[psyco]

She went to school and asked the teacher about the circular part (ie, you can work out mass if you guess and use 118 RMM, or you can work out 118 if you know the mass, but you're given neither and so you have to guess one or the other) and she said yes she expected people to work backwards from the 118, so its all groovy.

Thanks everybody!

*zoom* above my head

 

[old.Tohtori]

and she said yes she expected people to work backwards from the 118,

I always ask the ladies if i too can start working from the backwards, but no such luck

 

[swords]

Decimetres make my eyes bleed, what ever happened to using mg/ml concs? ffs

 

[psyco]

I always ask the ladies if i too can start working from the backwards, but no such luck

rofl

 

[crispy]

Decimetres make my eyes bleed, what ever happened to using mg/ml concs? ffs

Cause decimetres^3 = 1 liter

 

[cHodAX]

I had great fun doing titration calcs at A-Level... thank fuck I can't remember anything about them now. Alcohol made sure of that.

That and the STD's from those dirty Stoke slags

 

[swords]

Cause decimetres^3 = 1 liter

But its less actually writing to use litres Its easier to write 1L than 1dm^3
Time spent labelling = time wasted so my comment stands!

 

[Ludh1]

You guys really don't know anything about Chemistry

 

[UrganNagru]

I don't, if only I saw you message before you were banned so you could of taught me the secrets of the universe

Fucksticks

Sorry just been on that band on one of the other threads, got it stuck in my head now.

 

[tris-]

But its less actually writing to use litres Its easier to write 1L than 1dm^3
Time spent labelling = time wasted so my comment stands!

isnt dm^3 SI unit though,

or some fucking shit?

 

[Huntingtons]

Wow, looking back at your old posts too you really are a tard

well, you see he think he's something coz he thinks he can help and is abusing his 'power'...

 

[megadave]

Must say she's lucky to have such a helping family, never got help like this myself :<

 

[UrganNagru]

I wouldn't of wanted it, pride/laziness got in my way, only problem with that was resulted in shite coursework

 

[Paradroid]

thuh! Bloody kids and their lar-de-da schooling! Coming home with their calculations and such. In my day we used to have to put our backs into it. No fancy equations were around then to help us out. No online superhighway of information and free answers back then. Count the atoms you lazy upstart and weigh the molecules individually. Life's just one big shortcut for you isn't it? Avogadro must be spinning in his grave.

 

[psyco]

thuh! Bloody kids and their lar-de-da schooling! Coming home with their calculations and such. In my day we used to have to put our backs into it. No fancy equations were around then to help us out. No online superhighway of information and free answers back then. Count the atoms you lazy upstart and weigh the molecules individually. Life's just one big shortcut for you isn't it? Avogadro must be spinning in his grave.

i assume things went alot slower in those days... so your probbly getting more for you money

 

[swords]

isnt dm^3 SI unit though,

or some fucking shit?

Well m is an SI unit so it is, but the French are fucking wierd imo.

 

[tris-]

Well m is an SI unit so it is, but the French are fucking wierd imo.

stupid frogs. all our standards have to be what they say :\