Links I found helpful with dilutions:
Friday, January 8, 2016
Aqueous Solutions Lab
Today in class we performed a lab in order to see how the concentrations of each solution change in a serial dilution. We started out with a solution containing 10.0 mL of water and 20 drops of blue food coloring. Between each solution we took 1.0 mL from the previous solution and added 9.0 mL of water, doing this until blue coloring was no longer visible. After diluting the color out of the solutions, we calculated the concentration of solution B, solution C, and solution H. In order to make these calculations we started with the formula (2.0)(1.0) = M2(10.0). As we continue through the solutions in the serial dilution, however, the first number in the formula becomes the result of the last calculation. These calculations show the concentration of the solutions in drops.
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Erin, I like how you clearly explained the lab and showed its relevance to our unit. In addition, I like how you displayed your calculations, showing others how to solve similar problems. Lastly, your pictures clearly represent a dilution's effects on a solution.
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