Which of the following statements DOES NOT describe the real limitation of Beer’s Law?     At the concentration below 0.01 M deviations can be encountered if the molecules are big enough to alter the refractive index solution     The concentration of non-absorbers does not cause any deviation from Beers Law.     The absorbance of sample solution is directly proportional to the concentration at analyte concentration of < 0.01 M     The interaction of absorbing molecules causes the shift in absorption band

Using words and/or pictures and/or equations, explain how the use of a deuterium (D2) lamp can correct for spectral interference in flame atomic absorption spectrophotometry (background absorption/scattering by non- specific absorbers).

Define the following terms: spectrophotometer, absorbance, pathlength, & (also known as molar absorptivity), concentration, transmittance, Beer's law. RODUCTION:

A student prepared an equilibrium system using Fe(NO3)3 and KSCN, which reacted to produce iron(III) thiocyanate by the balanced reaction shown below. Fe3+ + SCN' + FESCN2+ Previously the student prepared a Beer's Law calibration plot of absorbance (y-axis) versus FESCN2+ (x-axis) and calculated a trendline with the equation of y = 3229x. The student then prepared another equilibrium mixture using the following amounts. 0.00200 M Fe(NOa)a (mL) 0.00200 M KSCN (mL) 0.1 M HNO3 (mL) Absorbance 6.00 3.00 16.00 0.258 Use the above data to find initial and equilibrium concentrations of each species and use an ICE table to calculate Keg. [ Fe+ ] initial: [ SCN' ] initial: [ FESCN2+ ] initial: [Fe3+ ] at equilibrium: [ SCN' ] at equilibrium: [ FESCN2+ ] at equilibrium: Keg =