1. Bell ringer # 2 :
How many grams of CaC2 are needed to produce 78.0 g of acetylene?
CaC2(s) + 2 H2O(l) → C2H2(g) + Ca(OH)2(aq)
TIME’S UP!
START TIMER 5 4 1 3 2

2. Bell Ringer # 2 (Stoichiometry):
How many grams of CaC2 are needed to produce 78.0 g of acetylene?
CaC2(s) + 2 H2O(l) → C2H2(g) + Ca(OH)2(aq)

3. CaC2(s) + 2 H2O(l) → C2H2(g) + Ca(OH)2(aq)
 How many grams of CaC2 are needed to produce 78.0 g of acetylene?
____ _____
CaC2(s) + 2 H2O(l) → C2H2(g) + Ca(OH)2(aq)

4. CaC2(s) + 2 H2O(l) → C2H2(g) + Ca(OH)2(aq)
 How many grams of CaC2 are needed to produce 78.0 g of acetylene?
X g g
CaC2(s) + 2 H2O(l) → C2H2(g) + Ca(OH)2(aq)

5. CaC2(s) + 2 H2O(l) → C2H2(g) + Ca(OH)2(aq)
 How many grams of CaC2 are needed to produce 78.0 g of acetylene?
X g g
CaC2(s) + 2 H2O(l) → C2H2(g) + Ca(OH)2(aq)
64.11 g g 

6. CaC2(s) + 2 H2O(l) → C2H2(g) + Ca(OH)2(aq)
How many grams of CaC2 are needed to produce 78.0 g of acetylene? 
X g g
CaC2(s) + 2 H2O(l) → C2H2(g) + Ca(OH)2(aq)
64.11 g g   =

7. CaC2(s) + 2 H2O(l) → C2H2(g) + Ca(OH)2(aq)
How many grams of CaC2 are needed to produce 78.0 g of acetylene? 
X g g
CaC2(s) + 2 H2O(l) → C2H2(g) + Ca(OH)2(aq)
64.11 g g   =

8. CaC2(s) + 2 H2O(l) → C2H2(g) + Ca(OH)2(aq)
How many grams of CaC2 are needed to produce 78.0 g of acetylene? 
X g g
CaC2(s) + 2 H2O(l) → C2H2(g) + Ca(OH)2(aq)
64.11 g g  =
X = = 192 g CaC2

9. ACTIVITIES:
Bell ringer #2.
Review (exercises from the WS).
QUIZ: Stoichiometric Problems.
Homework: Online Quiz: Stoichiometry Moe &
Mass.
Code: