Thickness of nickel foil required for the transmission of 35.8 % power of incident beam of Cu kα line needs to be calculated where 8.90g/cm 3 is the density of nickel. And the mass absorption coefficient of nickel is 49.2 cm 2 /g measured by Cu kα line. Concept introduction: Beer’s law will be used for the calculation of thickness of Ni foil. This formula is given as- ln P o P = μ M ρ x Where, P o = transmitted beam power P = incident beam power µ M = mass absorption coefficient ρ = density x = sample thickness

Question

A student combines Fe(NO3)3 solution and KSCN solution to produce a solution in which the initial concentrations of Fe3+(aq) and SCN–(aq) are both 7.9 × 10–3 M. The absorbance of this solution is measured, and the equilibrium FeSCN2+(aq) concentration is found to be 1.8 × 10–3 M. Fe3+ + SCN- <=> FeSCN2+ Determine the equilibrium constant for the above reaction

Answer 1

Question

Chapter 12, Problem 12.5QAP

Interpretation Introduction

Interpretation:

Thickness of nickel foil required for the transmission of 35.8 % power of incident beam

of Cu kα line needs to be calculated where 8.90g/cm³ is the density of nickel. And the mass absorption coefficient of nickel is 49.2 cm²/g measured by Cu kα line.

Concept introduction:

Beer’s law will be used for the calculation of thickness of Ni foil. This formula is given as-

lnPoP=μMρx

Where,

P_o= transmitted beam power

P = incident beam power

µ_M = mass absorption coefficient

ρ = density

x = sample thickness

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