This is the conductivity vs concentration of KCL: It says: y=1.29E+05x+62.8 R^2=

Question

This is the conductivity vs concentration of KCL:

It says: y=1.29E+05x+62.8

R^2= 9.996E-01

And these are our values in the time increments:

20min: 372.2 uS/cm

40min: 704.7 uS/cm

60min: 785.3 uS/cm

80min, 100min, 120min: no data.... could we still get these values somehow?

I just don't really know what to plug my conductivity values into in the KCL equation and what I am solving for... y, x, or E?! What is E? And how to get the ions left the egg in (B)

- Should the rate change with time? And what forces are driving the process?

Edit: For our conductivity vs time graph, y= 11.553x + 99.034 and the R^2 = .9342 if that is what you mean

Explanation / Answer

We will use the relation,

molar conductivity = limiting molar conductivity - Ksq.rt(C)

This is similar to,

y = mx + c

From the above given data,

y=1.29E+05x+62.8

Feed the value for molar conductivity at 20 min

20min: 372.2 uS/cm

372.2 = 1.29 x 10^-5 x +62.8

x = 5.753 x 10^-6 M

Thus, for KCl, it is a strong electrolyte ionizes completely in solution,

KCl -----> K+ + Cl-

molar concentration of [K+] = [Cl-] = 5.753 x 10^-6 M

Similarly we can feed other values into the given equation to find the molar concentration of ions at that particular time.

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