titration prac (1 Viewer)

[paper cup]

Ok so my room is a warzone and I can't find this prac sheet, does anyone have notes on it - we did oxalic acid and NaOH -
argh
please help thank you

 

[Dreamerish*~]

We usually do NaOH and CH₃COOH.

What kind of notes do you need? The procedure, calculations, safety precautions, cleaning of equipment, all of the above?

 

[paper cup]

We usually do NaOH and CH₃COOH.

What kind of notes do you need? The procedure, calculations, safety precautions, cleaning of equipment, all of the above?

pretty much, it was all on that sheet :/
oh also, we don't need to know how to draw titration graphs do we?

 

[Dreamerish*~]

pretty much, it was all on that sheet :/
oh also, we don't need to know how to draw titration graphs do we?

Oh, I doubt it.

But you do know how strong and weak acids react with strong and weak bases, right? If you do, then even if they do ask for titration graphs, you'll be fine.

Remember that for weak acids reacting with weak bases, the equivalence point isn't clear. The graph is curved and does not have the sudden decrease or increase in pH.

 

[KYKYJ]

arrrgggh h h h canu help me wit molar calculations??!?! lol a few days 2 go and i'm still strugllin!!!

 

[paper cup]

Oh, I doubt it.

But you do know how strong and weak acids react with strong and weak bases, right? If you do, then even if they do ask for titration graphs, you'll be fine.

Remember that for weak acids reacting with weak bases, the equivalence point isn't clear. The graph is curved and does not have the sudden decrease or increase in pH.

Ok thanks I need to work on chem...do you think you could give me the procedure, any glaring safety thingos and the calculations please?

 

[richz]

arrrgggh h h h canu help me wit molar calculations??!?! lol a few days 2 go and i'm still strugllin!!!

well the last advice i wud give u is to work with units.

eg. to get moles from moles/L * by litres etc etc

 

[Dreamerish*~]

Ok thanks I need to work on chem...do you think you could give me the procedure, any glaring safety thingos and the calculations please?

Hmm, let me think.

With procedures, it's quite clear what you have to do, but there are a few important factors, mostly associated with cleaning:

• Wash the burette once with distilled water, then twice with the solution which it will hold.
• Wash the pipette once with distilled water, then twice with the solution which it will hold.
• Wash the conical flask with distilled water only.
• Ensure that there are no air bubbles at the bottom of the burette.
• Fill the burette with the solution until the bottom of the meniscus reaches the zero mark.
• Remove the filter funnel before you do the previous step.
• Do not blow or tap the last drops out of the pipette.

Safety precautious:

• Do not suck solution into the pipette. Use a pipette filler.
• Don't drink the chemicals?

Lol, that's all I can think of.

As for calculations, you use the C₁V₁ = C₂V₂ formula.

 

[jamesy_1988]

you should be able to find my prac report at

http://www.geocities.com/jamesyscience_chemistry/hsc/tae/exp.html

Andrew