This is the classic "five bottles" experiment, using droppers (Beral pipets) instead of bottles. The student is presented five labelled solutions (the first set of solutions is always the same, after that they are randomly selected from a database of eight solutions). Drops of these solutions are mixed on a 48-well plate, and observations are recorded as "X" (no observations), "G" (gas bubbles), and "W", "Y", or "B" for a white, yellow, or black precipitate. The five solutions are then scrambled and re-labeled with numbers. The goal is to identify the numbered solutions. Results may be checked, and may be printed out to be turned in as an assignment.
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