CaOHC Final Exam (2024) || With Questions & Answers (Graded A+)
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Course
CAOHC
Institution
CAOHC
CaOHC Final Exam (2024) || With Questions & Answers (Graded A+)
CaOHC Final Exam (2024) || With Questions & Answers (Graded A+)
Why is the CaOH spectrum in figure 8-8 much broader than the sodium emission line? - ANSWER - -CaOH is ionic and it can have both (vibrational ↔ rotational states) w...
, CaOHC Final Exam (2024) || With Questions &
Answers (Graded A+)
Why is the CaOH spectrum in figure 8-8 much broader than the sodium emission line? - ANSWER - -
CaOH is ionic and it can have both (vibrational ↔ rotational states) which leads to broader emission
lines
-Since Na is a single element its unable to to exhibit these lines
What is resonance fluorescence? - ANSWER - emitted radiation is of the same wavelength as the
radiation and can be used to excite the fluorescence
Under what conditions could a strokes shift occur? - ANSWER - when an excite atom goes from an
excited state to a lower energy state and fluoresces longer than the wavelength =
What determines natural line widths for atomic emission and absorption lines? - ANSWER - -lifetime of
an excited state
- 10^-5 nm or 10^-4Å
In a hot flame, the emission intensities of the sodium lines at 589.0 and 589.6 nm are greater in a sample
solution that contains KCl than when this compound is absent. Suggest an explanation. - ANSWER -
ionization is suppressed by the high conc of the potassium and that means that there are more sodium
atoms --> so emission intensities will increase.
The intensity of a line for atomic Li is much lower in a natural gas flame, which operates at 1800°C, than
in a hydrogen-oxygen flame, whose temperature is 2700°C. Explain. - ANSWER - -Higher Temp results in a
higher # of EXCITED ELECTRONS
- the more excited the greater the # of particles and emissions
Name a continuous type of atomizer that are used in atomic spectroscopy - ANSWER - inductively
coupled plasma
where signal = CONSTANT
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