You had (chemistry) standards 3a, b and c for classwork; standards 4d, e, f and g for homework. Today I placed you in seven groups and asked each group to explain what a particular standard meant. Some of you blew off the assignment. I could see this as I circulated through the room to work with you on understanding the meaning and application.
Tomorrow you will have a lab based on these standards. Starting with a piece of magnesium, you will ignite it. The result is magnesium oxide. How much magnesium oxide do you expect? How much do you actually obtain? Then, you will determine how much hydrochloric acid you need to react with the magnesium oxide to produce magnesium chloride. What is the other product? Finally, you will dry the result and calculate the yield. You need to understand how to determine the molar mass, number of moles and percentages. You will need to know how to use a balance, and how to work in the lab safely.
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