Answer:
8000 L/ mol cm is the value of the molar absorptivity coefficient.
Explanation:
The slope of the absorbance- concentration graph is equal to the product of path length and molar absorptivity coefficient.
[tex]\frac{dA}{dc}=\epsilon l[/tex]
[tex]\frac{dA}{dc}[/tex]= Rate of change of absorbance with respect to concentration
[tex]\epsilon [/tex] = molar absorptivity coefficient
l = Path-length
Given the slope of graph of absorbance vs procaine hydrochloride concentration.
y = 240000 x (linear equation)
Path length of cuvette = 3 cm
[tex]A=240000 c[/tex]
[tex]A=\epsilon c\times l=(\epsilon l)\times c[/tex]
[tex]240000=\epsilon \times 3[/tex]
[tex]\epsilon =\frac{24000}{3}=8000[/tex]
The units of [tex]\epsilon = 8000 l/mol cm[/tex]
8000 L/ mol cm is the value of the molar absorptivity coefficient.
