02 Chem Rxn-Rearrange.docx - Chemistry – Unit 7 Chemical...

Chemistry – Unit 7 Chemical Reactions
Rearranging Atoms
Background
Describe what you already know about each of these ideas. Give an example in
each of the last 4 items.
Features of Our Current Model of Matter
Conservation of Mass
Chemical Formula
Subscripts in formulas
Coefficient (Hint: what is the function of a coefficient in math?)
Procedure
:
1. Use your atom model kit to construct the reactant molecules for each chemical
change below. Then rearrange the atoms to form the product molecules. Add more
reactant molecules as needed to form complete product molecules with no left-overs.
2. Draw particle diagrams for each reactant molecule used and each product molecule
produced under the reaction.
3. Determine the number of each reactant molecule you needed in order to make the
product(s) with no leftovers (a complete reaction) and record each number as a
coefficient in front of its reactant formula.
4. Determine how many product molecules you would get from the complete reaction.
Write that number as a coefficient in front of each product formula.
©Modeling Instruction – AMTA 2013 1 U7 rearrange v2.0