Neco 2024 Chemistry Question 1

Practice practical question 1 from the 2024 Neco Chemistry examination. This question covers Atomic Structure .

Neco 2024 Chemistry Practical

Topic: Atomic Structure

Question 1 NECO • 2024 • CHEMISTRY • practical

A diffraction grating with 5000 lines cm\(^{-1}\) is used to observe the first line of the Balmer series of hydrogen (transition n = 3 \(\rightarrow\) n = 2). The angle between the incident beam and the first‑order diffracted beam is measured as 20.0°. (a) Calculate the wavelength of this Balmer line. (b) Using the Balmer formula \(\frac{1}{\lambda}=R\left(\frac{1}{2^{2}}-\frac{1}{n^{2}}\right)\) with \(n = 3\), determine the experimental value of the Rydberg constant \(R\). (c) Comment briefly on the accuracy of your experimental \(R\) value compared with the accepted value \(R = 1.097\times10^{7}\,\text{m}^{-1}\).

( a )

Calculate the wavelength of this Balmer line.

( b )

Using the Balmer formula with n = 3, determine the experimental Rydberg constant R.

( c )

Comment briefly on the accuracy of your experimental R value compared with the accepted value \(1.097\times10^{7}\,\text{m}^{-1}\).

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This is Neco 2024 Chemistry Question 1. It is one of the practical questions from the 2024 Neco Chemistry examination.

The question covers Atomic Structure .

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