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Lab Questions On Environmental Solutions

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Jonathan Haas
J3309092
CHM2046L – W730
Week 10: Post lab Questions – Environmental Solutions I (25 points)
Scientists use an instrument called a spectrometer to quantitatively determine the amount of light absorbed by a solution. The primary inner parts of a typical spectrometer are described below. The spectrometer has a light source that emits white light containing a vast mixture of different wavelengths of electromagnetic radiation. The wavelength of interest is then selected using a monochromator (“mono” meaning one and “chromate” meaning color) and an additional exit slit. The separation of white light into different colors (wavelengths) is known as diffraction. The selected light then reaches the sample and depending on how the light interacts with the chemical compound of interest, some of the light is absorbed and some passes straight through. By comparing the amount of light entering the sample (P0) with the amount of light reaching the detector (P), the spectrometer is able to tell how much light is absorbed by the sample.

Define all of the bold words in the previous paragraph. (4 points) Spectrometer – A spectrometer is a device which takes in light and then breaks down light into the various components of the electromagnetic spectrum. Quantitatively – Relating to a measurement or amount of something. Electromagnetic Radiation – A form of energy composed of waves of electric and magnetic changes (from electrically charged particles). It deals with

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