spectrometer

spectrometer - Abstract: To utilize spectrophotometry to...

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Abstract: To utilize spectrophotometry to obtain transmitted light percentages in a solution. Percentage of light transmitted was found by creating two different concentrations of Cr(NO3)3 each with different molarities. Solutions were then tested in a spectrophotometer showing the readings of .43 absorbance and 37.1% transmittance for solution 1 (concentrated) and .11 absorbance and 77.0% transmittance for solution 2 (diluted). Final results lead to the conclusion that the lower the molarity of a solution the higher the light transmittance. Introduction: Unique to substances is the substance’s ability to absorb light and specific wavelengths thus determining the nature of an unknown substance. However, scientists can not measure light absorbed and instead must use transmitted light. In order to measure transmitted light a spectrophotometer is used which utilizes a light source and refracts it into wavelengths which are then passed through the solution. The amount of light then passed through the sample and read on the detector is considered the transmittance (T). Absorbency is based on Beer’s Law which states that any substance is linearly dependent
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This note was uploaded on 04/28/2011 for the course CHEM 152 taught by Professor Solula during the Spring '11 term at Mesa CC.

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spectrometer - Abstract: To utilize spectrophotometry to...

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