Determine the value of k' from the slope. These graphs were plotted in terms of absorbance, but the rate constant should be in terms of concentration. Beer-Lambert's law and the literature value for the molar absorptivity constant (87,000 M^-1cm^-1 can be used to convert the slope from units of absorbance/s to units of concentration/s. This value is the pseudo rate constant, k'.

k' = (2.0345 × 10⁻⁸) M/s.

Explanation:

Beer-Lambert's law explains that Absorbance is directly proportional to the concentration of the substrate under consideration.

A ∝c

A = εlc

where ε = molar absorptivity constant = 87,000 M⁻¹cm⁻¹

l = path length of the solution that the light passes through in cm = 1 cm for most cases.

c = concentration of the substrate.

In terms of rate terms,

A' = εlc'

where A' has units of Absorbance/s

c' = rate of reaction, units of concentration/s

A' = εlc'

From the graph, the slope of the graph = 0.00177 Absorbance/s

0.00177 = 87000 × 1 × c'

c' = (0.00177/87000)

c' = (2.0345 × 10⁻⁸) M/s.

This value is the pseudo rate constant, k'.

Hope this Helps!!!

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.