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Showing revision 5
Initial Procedures
- Separate into groups of 2 with 1 group of 3 if needed.
- Each group needs to obtain a bag labelled A and one labelled B.
- Each group get a balance and make sure it is zeroed.
- Mass each bag and put masses in following blanks.
Mass of A: __________________ g Mass of B: ______________
Background Information and more procedures
We are going to use two Substance (A and B) as our reactants. These reactants will form products (actually different groupings of A & B) by the following chemical reaction:
4 A + 3 B --> 1 A2B1 + 2 A1B2
Question: With your knowledge of the mass of each bag (do not do any counting) and how these material are going to combine (from above chemical reaction),
Which Substance A or B with run out first (write guess in here): _____________________
- Now open each bag and count how many items are in each bag and record that number here
Number of A in bag: ___________________ A Number of B in bag: _____________________B
Question: Again without calculating and now your knowledge of how many items you have of each (and chemical reaction),
Which Substance A or B will run out first (write guess here): ________________