Journal Entry:

What other data could be used to determine concentration of an unknown using light besides absorbance?

Learning Intentions

• 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 interpret the results of an experiment regarding the absorption and transmittance of light to determine the concentration of an absorbing species in a solution.

• We will learn how to determine mass of a substance from concentration.

• We will learn how concepts from our labs could show up on AP FRQ questions.

Closing Task:

You can apply concepts from our recent labs to AP FRQ questions.

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)