Neco Model Questions Vol1 2018 Chemistry Question 1

Practice practical question 1 from the 2018 Neco Model Questions Vol1 Chemistry examination. This question covers Atomic Structure, Spectroscopy, Rydberg constant .

Neco Model Questions Vol1 2018 Chemistry Practical

Topics: Atomic Structure Spectroscopy Rydberg constant

Question 1 NECO_MODEL_QUESTIONS_VOL1 • 2018 • CHEMISTRY • practical

A spectroscope is used to observe the Balmer series lines of hydrogen. The wavelengths recorded are: Hα (n=3→2) = 656.3 nm, Hβ (n=4→2) = 486.1 nm, Hγ (n=5→2) = 434.0 nm.

Question Parts

( a )

Calculate the Rydberg constant (R) for each of the three observed lines using the relation \(\frac{1}{\lambda}=R\left(\frac{1}{2^{2}}-\frac{1}{n^{2}}\right)\).

( b )

Determine the average value of the Rydberg constant from the three results obtained in part (a).

( c )

Using the average Rydberg constant, calculate the wavelength of the transition from n = 6 to n = 2 (Balmer series).

( d )

Comment briefly on the reliability of the average Rydberg constant obtained.

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About This Question

This is Neco Model Questions Vol1 2018 Chemistry Question 1. It is one of the practical questions from the 2018 Neco Model Questions Vol1 Chemistry examination.

The question covers Atomic Structure, Spectroscopy, Rydberg constant .

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