(a)
Interpretation:
The minimum tube voltage needs to be calculated for the excitation of K lines for Ca (3.064).
Concept introduction:
Calculation of minimum tube voltage for the excitation of k lines for Ca is done by using the following formula-
Where,
λo = wavelength
Vmin = minimum tube voltage
(b)
Interpretation:
The minimum tube voltage needs to be calculated for the excitation of La lines for As (9.370).
Concept introduction:
Calculation of minimum tube voltage for the excitation of k lines for Ca is done by using the following formula-
Where,
λo = wavelength
Vmin = minimum tube voltage
(c)
Interpretation:
The minimum tube voltage needs to be calculated for the excitation of Lß lines for U (0.592).
Concept introduction:
Calculation of minimum tube voltage for the excitation of k lines for Ca is done by using the following formula-
Where,
λo = wavelength
Vmin = minimum tube voltage
(d)
Interpretation:
The minimum tube voltage needs to be calculated for the excitation of Lß lines for U (0.496).
Concept introduction:
Calculation of minimum tube voltage for the excitation of k lines for Ca is done by using the following formula-
Where,
λo = wavelength
Vmin = minimum tube voltage
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Chapter 12 Solutions
Principles of Instrumental Analysis, 6th Edition
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- Atomic spectroscopy is a type of spectroscopic technique that is used for both quantitative and qualitative analysis of an element present in a sample. The atomic absorption lines are very narrow and the line emitted by the radiation source must be the same as the element to be analyzed. (i) (ii) Name two types of line sources that are commonly used in atomic absorption spectroscopy. Suggest two elements that can be determined by each type of the line sources as mentioned in part (a)(i) above.arrow_forwardFish-liver oil is a good source of vitamin A, which is mea-sured spectrophotometrically, after correcting for background, ata wavelength of 329 nm.(a) Suggest a reason for using this wavelength.(b) In what region of the spectrum does this wavelength lie?(c) When 0.1232 g of fish-liver oil is dissolved in 500. mL of sol-vent, the absorbance is 0.724 units. When 1.67X10⁻³g of vita-min A is dissolved in 250. mL of solvent, the absorbance is 1.018 units. Calculate the vitamin A concentration in the fish-liver oilarrow_forwardA solution containing 1.00mg iron (as the thiocyanate complex) in 100mL was observed to transmit 70.0% ofthe incident light compared to an appropriate blank. (a) What is the absorbance of the solution at thiswavelength? (b) What fraction of light would be transmitted by a solution of iron four times as concentrated?arrow_forward
- ii) Calculate the screening constant (sigma) on a 2p electron of N- and N and for each species. deduce the values of Z* iv) What do you conclude about the relative sizes of N3- and N from the values of Z*?arrow_forwardI understand that n is the energy level, l is the type of orbital (s,p,d,f) and how ms is related to the spin; but what about ml ? I know its equal to -l to +l; however, what does having a specific ml value mean?arrow_forward(d) Where electrons are more likely to be found justify your answers with specific reason [1] b x→ ....arrow_forward
- 18.1 An electron in the ground-state He* ion undergoes a transition to a state specified by the quantum numbers n= 4, 1=1, m,=+1. (a) Describe the transition using term symbols. (b) Calculate the wavelength, frequency, and wavenumber of the transition. (c) By how much does the mean radius of the electron change due to the transition? You need to know that the mean radius of a hydrogenic orbital is n’a 1+회 I(1+1) 1-arrow_forwardHow do you convert 435.835 λ(nm) to v (s-1)arrow_forward(a) The surface of a metal is illuminated with light of wavelength 590nm. A PD of 0.15V is applied between the metal surface and the collecting electrodes in order to prevent the collection of electrons. Calculate:(i) The work function of the metal.(ii.) The work done against the most energetic photoelectrons.(iii.) The speed of the most energetic electrons. (b.) Light of varying frequencies is incident on the surface of three different metals x, y and z. The work functions wo of the metals are such that w0x < w0y < w0z. Sketch on the same axes graphs to show how the maximum kinetic energies of photoelectrons vary with frequency.arrow_forward
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