A spectrophotometric method for the determination of Fe (II) is based on the measurement of the red-orange color of its complex with o-phenanthroline. The complex obeys Beer's law for Fe (II) concentrations lower than 9 ppm. It is known that a solution containing 0.100 ppm of Fe(II) in excess of o-phenanthroline produces an absorbance of 0.200 in a cuvette with 1.00 cm of optical path and that an unknown sample gives an absorbance of 0.470 under the same conditions, Calculate: a) The concentration of Fe in the unknown sample in moles/L and ppm. b) The molar absorptivity coefficient of the complex. Fact. Fe = 55.845
Atomic Structure
The basic structure of an atom is defined as the component-level of atomic structure of an atom. Precisely speaking an atom consists of three major subatomic particles which are protons, neutrons, and electrons. Many theories have been stated for explaining the structure of an atom.
Shape of the D Orbital
Shapes of orbitals are an approximate representation of boundaries in space for finding electrons occupied in that respective orbital. D orbitals are known to have a clover leaf shape or dumbbell inside where electrons can be found.
A spectrophotometric method for the determination of Fe (II) is based on the measurement of the red-orange color of its complex with o-phenanthroline. The complex obeys Beer's law for Fe (II) concentrations lower than 9 ppm. It is known that a solution containing 0.100 ppm of Fe(II) in excess of o-phenanthroline produces an absorbance of 0.200 in a cuvette with 1.00 cm of optical path and that an unknown sample gives an absorbance of 0.470 under the same conditions,
Calculate:
a) The concentration of Fe in the unknown sample in moles/L and ppm.
b) The molar absorptivity coefficient of the complex.
Fact. Fe = 55.845
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