1. Atomic Chemistry Unit 2o11
DIGI: AC6 and AC7

2. AC6: I can describe how the properties of a compound may differ from the elements from which it was chemically formed.
Fe CuSO4  Cu FeSO4
(iron) (copper sulfate) (copper) (iron sulfate)
Identify the reactants and products in the equation above.
Is the following statement true? Use one of the reactions you’ve seen in class to support your argument.
“In a chemical reaction, the properties of the products must be exactly the same as the properties of the reactants.”
Reactions you’ve seen in class:
Fe + O  FeO Fe + S  FeS Zn + HCl  ZnCl + H2
3. (Extension) Describe the products and reactants for a reaction that is not listed above (you don’t need to know symbols).

3. AC7: I can predict changes in mass in open and closed systems after physical and chemical changes.
CaCO3  CaO + CO2 (gas) 4. The reaction above takes place in an open beaker. What do you think will happen to the mass of the beaker after the reaction has happened? Use evidence from the equation to support your answer. 5. The reaction is performed again, but this time in a tightly sealed beaker. What do you think will happen to the mass of the beaker after the reaction has taken place? Explain your answer.