Exp4_Equilibrium-Constant-online-su21.pdf

87525 Assignment
1.
a) Equilibrium constant =
b) =
c)
d)
e)
2.
Equilbrium constant =

3. A calibration curve, also known as a standard curve, is a method generally used to determine the concentration of a substance in an unknown sample by comparing the unknown to a set of standard samples of known concentration.
Mainly used to find out the concentration of substance in unknown sample by comparison tests.
Experiment vs equi…
1. The data given is graphed as follows:
L = length of light path = width of cuvette
We have absorbance = A =
i.e. C1/C2 =
Initial concentration is 0 but let us take for calculations purpose as 0.00001
0.00001/C2 = 0.00001/1 divided by 0.420/2
i.e. C2 = 0.21
Since absorption and concentration are linearly related we have
A1/A2 = C1/C2 always
Using this we fill the table
For A-4 we have A1/A2 = C1/C2
A2 = 2 *C2
Hence C4 =...