Procedure
This experiment requires attention to detail to give very good results. Therefore, you must use
time wisely. For the most efficient use of time, make solutions as needed; making all solutions
before they are needed wastes time and glassware. If you must continue the experiment
through a second week, save your materials in a stoppered flask. Be sure to label the flask
clearly. The cleaved solution can also be left to cool and used the following week with any
uncleaved dilutions left from the first week. Be sure that the laboratory instructor knows you
have stored materials for use (to prevent things from being thrown away!!).