1. Launch: 11/18
Grab your binder and immediately take a seat!
Place homework (practice questions) on desk.
Balance the following equations showing all 3-steps
in your work!
1. __Na + __Cl2 __NaCl
2. __CH4 + __O2 __CO2 + __H2
4. How are equations balanced?
There is a 3-step process for balancing
equations:
1. Count the atoms on both sides
2. Change a coefficient & multiply out
3. Check tally (and repeat)
Only one rule: you can’t change the subscripts
10. Balancing Buffet
Grab a menu and “order” your 100 point “dinner”
Appetizers = 5 points
Entrees = 10 points
Desserts = 15 points
Write questions on a piece of binder paper
Balance the equation showing all of your work!
1. Count the atoms
2. Add a coefficient
3. Check tally (and repeat)
11. Exit Slip
1. In a balanced equation
a. the reactant atoms are destroyed to make the
products
b. the number of atoms on the reactants side of the
equation is equal to the number of atoms on the
products
c. the number of atoms on the reactants side of the
equation is not equal to the number of atoms on the
products
d. all compounds have a coefficient of at least 2
12. Exit Slip
H2 + Cl2 HCl
2. Is the above equation balanced?
a. No, because H2 has a coefficient of 2.
b. No, because the number of Cl and H atoms are not
equal.
c. Yes, because the number of H atoms is not equal on
both sides.
d. Yes, because there are equal numbers of atoms on
both sides of the equation.
13. Exit Slip
4K + O2 2K2O
3. In the already balanced reaction above, what is the
coefficient for O2?
a. 0
b. 1
c. 2
d. 4
14. Exit Slip
__C + __Br2 __CBr4
4. When the equation above is completely balanced,
the coefficient for Br2 would be
a. 0
b. 1
c. 2
d. 4
15. Exit Slip
__Na + __H2O __NaOH + __H2
5. When the above equation is completely balanced,
the coefficient for NaOH would be
a. 1.
b. 2.
c. 4.
d. 8.
