10/11 warm up
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10/11 Warm Up. SWOD: Conservation of Mass pg L-58 (look at Figure 9) Finish your green lab sheet from yesterday if it’s not completed yet Pull out notebook, title it “Chemical Equations”. It’s the Law Lab. What was the purpose? - PowerPoint PPT PresentationTRANSCRIPT
10/11 Warm Up
• SWOD: Conservation of Mass pg L-58 (look at Figure 9)
• Finish your green lab sheet from yesterday if it’s not completed yet
• Pull out notebook, title it
“Chemical Equations”
It’s the Law Lab
• What was the purpose?
•How did the mass of the BS & V compare before and after it reacted?
It’s the Law Lab
•How did the mass compare before & after it was opened?
It’s the Law Lab
•So does gas have mass?
Conservation of Mass
2 H2O2 → 2 H2O + O2
110g + 10g + 3g123g
In notebook, title “Chemical Equations”
• Reactant + reactant product + product• product + product reactant + reactant
Example 1 - Water(Don’t write) H + O H2O
1. How many atoms are on the reactant side? ___ H + ___ O 2. How many atoms are on the product side?___ H + ___ O 3. Are there the same amount of H atoms on both
sides?4. Are there the same amount of O atoms on both
sides?5. Are we balanced?
Example 1 - Water
H + O H2O
Balance the equation…
H2 + O2 H2O
H2 + O2 H2O
Mass of reactants = mass of products?
4 (H) + 2(O) =2 (H2O)
In notebook write:
• Ex 1: 2H2 + O2 2 H2O
• Circle the reactants & box the products
Ex 2: Salt
Na + Cl NaCl
In Notebooks:Na + Cl NaClCircle the reactantsBox the products
Example 3: Photosynthesis
6 (CO2) + 6(H2O) C6H12O6 + 6 (O2 )
Example 3: Photosynthesis
6 CO2 + 6 H20 C6H12O6 + 6 O2
carbon dioxide + water sugar + oxygenIn notebooks: Circle the reactants:Box the products:
Example 4: Respiration
C6H12O6 + 6 O2 6 CO2 + 6 H20 + ATP
sugar + oxygen carbon + water + energydioxide
Circle the reactants:Box the products:Answer: C6H12O6 + 6 O2 6 CO2 + 6 H20 + energy
Example 5: Fire
Oxygen + Fuel (carbon) + ignition FIRE
Which of the following is a product of fire?
a. O2
b. Wood
c. spark
d. ash
Example 6: Rust
Fe + O2 + H20 Rust
What are the reactants and products?
With a partner at your table, answer the questions from the handout in
your notebook.
*Do NOT write on the paper, please*