[dun13203171]

Hi guys,
           I missed last weeks chemistry class due to having to cram work in to finish a project. I have been given the following task, its due for monday and I have no contact for the tutor over the weekend so hoping some of you guys may be able to highlight what I should do.

Use  results to determine Λο for the related salts CH3COONa, HCl and NaCl and then use some linear subtractions to yield Λο for CH3COOH.

I am not sure about what they want her, does a graph need to be plotted and extrapolated?

Produce a set of standard results to illustrate the determination of these conductance constants

thanks for your time

[Enthalpy]

The measure sums the effects of each ion type maybe? So knowing the ion composition of the first three, you could deduce the fourth?

[dun13203171]

I have found a document where this question must have been taken from. It states.

"Measure the conductivity of each of the solutions at least three (3) times, and take  the  average  value  and  determine  the  mean temperatureof  your solutions    for    which    the    conductivities    apply. Tabulate    the    solutionconcentration  c,  c1/2
,  the  conductivity  and  the  molar  conductivity  for  each  of
the preparations using the table 1(a)


(iii)
Draw a graph mΛ vs. c1/2 for each of the electrolytes
using your experimental data  and  determine οΛ(using  (3))  by   
extrapolating  to 0=cfor  each  of the electrolytes and compare the values of οΛderived from experiment to the ones  from  literature  (
table  2
 
The  method  fails  for  one of  the  electrolytes. Identify the electrode and why?"

I have all my tables prepared, so I just plot average molar conductivity over the square route of the concentration of the solution? Then extrapolate to zero....?

[dun13203171]

Hi guys,
             I have plotted my graphs but they do not look in any way correct compared to what im seeing on google images.

Heres my data

Conc. Of HCL soln (c)   0.02 molcm-3   0.01 molcm-3   0.005 molcm-3   0.0025 molcm-3   0.001 molcm-3

Conductivity (ᴧ)   6.47, 6.46, 6.46   3.26, 3.23, 3.22   1.78, 1.76, 1.75   1.7, 1.67, 1.66   0.27, 0.26, 0.26

Average Conductivity (ᴧ)   0.00646   0.00323   0.00176   0.00167   0.00026

M cond. ᴧm= ᴧ/c   0.323     0.323   0.352   0.668   0.26
C1/2           0.5683 0.5683   0.5933   0.8173   0.5099

Sorry its a bit all over the place, how is C1/2 calculated, I think I may have calculated it wrongly?

thanks

[dun13203171]

scrap that, ive realised what ive done!