Journal Entry:

Draw a particle view picture of two solutions of different concentrations. How could you identify concentrations of different solutions experimentally?    

Learning Intentions

• We will learn what absorbance and transmittance is and what scientific equipment you can use to measure these to determine concentration of an unknown.

• We will learn how to create a calibration curve using a number of dilution of a stock solution, determining the transmittance for each dilution and graphing the data to find a relationship between the two.

• We will learn how to design and/or interpret the results of an experiment regarding the absorption and transmittance of light to determine the concentration of an absorbing species in a solution.

Content Standards being covered:

 The interaction of electromagnetic waves or light with matter is a powerful means to probe the structure of atoms and molecules, and to measure their concentration. (EK 1.D.3)