BCA part two

Half way through the unit.  One thing we’ve noticed about BCA is that it is much easier to find the misconception that students have about what goes on in a reaction and correct it right away.

Lab on Monday.  I like to blend the old with the new and have, therefore, dusted off an oldie.  Mixing two solutions together to form a precipitate and filter.  From the mass of the precipitate, they have to find the Molarity of the original limiting reactant.

As this is my first time with BCA, every time a student comes in with a question, I’m making a note of what to change for next year.  the latest one is to remember to stress “subtract reactants” and “Add products”

bce example

I’ll see how the lab goes on Monday.

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