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conductivity

 
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Joined: 21 May 2006
Posts: 1
PostPosted: Sun May 21, 2006 8:18 am    Post subject: conductivity Reply with quote
did an experiment about Estimating the Concentration of Total Dissolved Ionizable Soilds by Conductivity , my solution was Nacl
i have 10 solution with different concentration and i measured the conductivity of each of them . I need to calculate the concentration of Cl- ion by this result, How can I >
is it the slope of the graph between conductivity and volume ??
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CynthiaA



Joined: 11 Nov 2006
Posts: 48
Location: Texas
PostPosted: Tue Jan 30, 2007 5:18 am    Post subject: Reply with quote
Are you certain it isn't something like this? (Sorry about the chart. I couldn't get it to line up under the headings in this post):

The molar conductivities (cm2 ohm -1 mol-1) of NaCl, CaCl 2, and LaCl3 at 298 K are tabulated as a function of concentration below:

c/M 0.0002 0.0005 0.001

Λ(NaCl) 125.2 124.5 123.7
Λ(CaCl2) 132.3 130.3 128.0
Λ(LaCl3) 139.0 135.0 130.0

Account for this concentration dependence and determine the limiting molar conductivities at zero concentration.

The limiting conductivity of the Cl- ion at this temperature is 66 cm2 ohm-1 mol-1. Calculate the limiting conductivity of the Na+ ion and compare it with the value of 38.7 cm2 ohm-1 mol -1 for the Li+ ion at this temperature.

The conductivities of both Li+ and Na + increase by 1.75 times between 298 and 328 K.
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