Chemistry Reference
In-Depth Information
Part II—Fill in the Blank
Determine the missing substance (element or compound) in each of
the following balanced equations.
6.
_____ + 2O
2
CO
2
+ 2H
2
O
N
2
+ 3H
2
8. Br
2
+ 2_____
2KBr + I
2
9. 2Mg + O
2
2_____
10. _____ + Na
2
SO
4
BaSO
4
+ 2NaNO
3
11. Zn + 2_____
7.
2_____
ZnCl
2
+ H
2
Part III—Classification
Classify each of the following as one of the five main types of chemical
reactions.
12. H
2
O
2H
2
+ O
2
________________________________________
13. K + NaCl
KCl + Na ___________________________________
14. 2C
2
H
6
+ 7O
2
4CO
2
+ 6H
2
O _____________________________
15. 2CO + O
2
2CO
2
_______________________________________
16. element + compound
compound ________________________
Part IV—Balancing Equations
Balance each of the following chemical equations. If an equation is
already balanced, then the correct response is “already balanced.”
17. AlPO
4
+ Ca(OH)
2
Al(OH)
3
+ Ca
3
(PO
4
)
2
18. C
2
H
4
+ O
2
CO
2
+ H
2
O
19. Fe
3
O
4
+ H
2
Fe + H
2
O
20. Al(OH)
3
Al
2
O
3
+ H
2
O
Part V—Redox Reactions
Assign oxidation numbers to each of the elements in the following
reactions.
21. H
2
+ Cl
2
2HCl
22. AgNO
3
+ Cu
Cu(NO
3
)
2
+ Ag
