The reason for the 30% more absorption for a solution containing 50% ethanol than the solution containing no ethanol needs to be explained, if both the solution contains the same amount of nickel. Concept introduction: Spectral lines are lines which help identify atoms and molecules. These are a result of absorption or emission of light in a comparatively narrower frequency range compared to the frequencies nearby. In a defined space, the amount of a substance gives its concentration. The capacity of a substance to absorb a specific wavelength of light gives its absorbance.

Question

I) Diamond crystallises in a face-centred cubic structure with a = 3.5625 Å. Calculate the d-spacing and peak position of the first allowed peak (i.e. the peak with the lowest hkl value that meets the selection rules) using a wavelength of 0.71073 Å. II) A solvothermal synthesis gave rise to a mixture of two crystalline phases: one phase consists of 50-65 μm octahedral crystallites while the other phase consists of 150-180 μm hexagonal plates. Identify a separation technique that would likely be effective in separating these materials.

Answer 1

Question

Chapter 9, Problem 9.6QAP

Interpretation Introduction

Interpretation:

The reason for the 30% more absorption for a solution containing 50% ethanol than the solution containing no ethanol needs to be explained, if both the solution contains the same amount of nickel.

Concept introduction:

Spectral lines are lines which help identify atoms and molecules. These are a result of absorption or emission of light in a comparatively narrower frequency range compared to the frequencies nearby.

In a defined space, the amount of a substance gives its concentration. The capacity of a substance to absorb a specific wavelength of light gives its absorbance.

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I) Diamond crystallises in a face-centred cubic structure with a = 3.5625 Å. Calculate the d-spacing and peak position of the first allowed peak (i.e. the peak with the lowest hkl value that meets the selection rules) using a wavelength of 0.71073 Å. II) A solvothermal synthesis gave rise to a mixture of two crystalline phases: one phase consists of 50-65 μm octahedral crystallites while the other phase consists of 150-180 μm hexagonal plates. Identify a separation technique that would likely be effective in separating these materials.

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