• Best of luck to the class of 2024 for their HSC exams. You got this!
    Let us know your thoughts on the HSC exams here
  • YOU can help the next generation of students in the community!
    Share your trial papers and notes on our Notes & Resources page
MedVision ad

acidic enviro dotpoint (1 Viewer)

trinity

Member
Joined
Mar 16, 2003
Messages
80
Location
Sydney
What did everyone do for the dotpoint:

perform a first-hand investigation to determine the concentration of a domestic acidic substance using computer based technologies

i don't think we've done it...

thanks alot! :D:D:D
 

jm1234567890

Premium Member
Joined
Aug 18, 2002
Messages
6,516
Location
Stanford, CA
Gender
Male
HSC
2003
we stuck a pH probe in detergent, vinigar, etc. and looked at the results.

then played solitare on the computer when the teacher left :p
 

trinity

Member
Joined
Mar 16, 2003
Messages
80
Location
Sydney
but is that the pH instead of the concentration of the acid...
you could work out the [H+] from the pH but is that the same as the actual concentration of the acid, as in molarity?
 
N

ND

Guest
Ok to determine concentration of acetic acid in vinegar you titrate the vinegar with a strong standard base (like NaOH). Instead of using an indicator however, use a data logger with a pH attachment. Set the logger to do frequent pH checks, and perform the titration (no indicator) until it's gone way past the equivalence point. Now on the graph of pH vs solution added, the equivalence pt will be where the gradient is steepest.
 

iambored

dum-di-dum
Joined
Apr 27, 2003
Messages
10,862
Location
here
Gender
Undisclosed
HSC
2003
we did what ND did

but withough the data logger... we did calculations or something to work it out
 

thehalford

New Member
Joined
Sep 24, 2003
Messages
19
Location
Here
Originally posted by jm1234567890
we stuck a pH probe in detergent, vinigar, etc. and looked at the results.

then played solitare on the computer when the teacher left :p
Heh, forgot about that. Good times for all.:D
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top