Question

Question 2 2 pts To study the emission lines from different elements, we cannot use a spectrometer like the Spec 20 used in lab that shines light through the sample. What can a Spec 20 be used for? Select all that apply. Colorless solids Colorless liquids Colorless gases Measuring an absorption spectrum Colored liquids Colored gases Measuring an emission spectrum Colored solids

Answer 1

Spec 20 is a spectrophotometer,which measures the intensity of a a light beam before and after it passes through a sample and it compares the two intensities.it also measures the transmittance and absorbance over a range of wavelengths.Spec 20 works under the principle of how much a chemical substance absorbs light by measuring the intensity of light as a beam of light passes through the sample.Absorbtion spectrum can be determined by this technique.It can be applicable to both coloured and colorless compounds.Spectrophotometres measures the absorbance of coloured and colourless compounds.When visible light passes through a coloured solution,some wavelenghts are transmitted and others are absorbed

Spectrometer can be applicable to;

• colourless  liquids
• colourless solids
• coloured liquid
• Measuring an absorbtion spectrum
• coloured solids.