Chemistry 100 - Balancing Drill & Practice

Dr. Gergens - San Diego Mesa College

1) Write a balanced reaction for the reaction that appears.

a) balance oxygen atoms last
b) balance hydrogen atoms second to last
c) use place holder "1"
d) use lowest whole number molar coefficients
e) identify physical state
f) identify reaction type
g) identify driving force

2) Write a sentence to describe the reaction; include physical state.

3) Predict the reaction type: 

a) combination/synthesis
b) decomposition
c) combustion; 
d) double replacement; 
e) single replacement;
f) acid-base-neutrallization.
4) Identify the driving force(s) in the reaction; there may be more than one.

a) gas formation
b) liquid formation
c) solid formation
d) the exchange/transfer of electrons (REDOX)

5) For videos on balancing (click here)

1. Balance:    Mg (s)   +    O2 (g) ______>      MgO (s)
 
2. Balance: KClO3 (s)  -------->  KCl (s) +   O2 (g)
 
3. Balance:  Cu (s) +  AgNO3 (aq)     -------->  Cu(NO3)2 (aq)    +    Ag (s)
 
4. Balance:        Al (s) +  S (s) -------->  Al2S3 (s) 
 
5. Balance:        Na2CO3 (aq) + CaCl2 (aq)  --------> CaCO3 (s)  +   NaCl (aq)
 
6. Balance:         Fe (s) +   Cl2 (g)  -------->   FeCl3 (s)
 
7. Balance:         Na3PO4 (aq) +  BaCl2 (aq) --------> Ba3(PO4)2 (s) + NaCl (aq)
 
8. Balance:         NaOH (aq) + CuSO4 (aq) -------->   Na2SO4 (aq) + Cu(OH)2 (s) 
 
9. Balance:        Mg(OH)2 (s)  + H2SO4 (aq) --------> MgSO4 (aq) +  H2O (l) 
 
10. Balance:         Al (s)  +   HCl (aq) -------->   AlCl3 (aq) +   H2 (g) 
 
11. Balance:   Mg (s) +   H3PO4 (l)   -------->  Mg3(PO4)2 (s) +   H2 (g) 
 
12. Balance:       Br2 (l)   +   CuI (aq)   -------->    CuBr (aq)  +  I2 (s) 
 
13. Balance:        NaOH (aq) + FeCl3 (aq)  --------> NaCl (aq) + Fe(OH)3 (s) 
 
14. Balance:        KBr (aq) + Pb(NO3)2 (aq) -------->    KNO3 (aq) + PbBr2 (s) 
 
15. Balance:        AlCl3 (aq) +   H2SO4(aq)-------->   Al2(SO4)3 (s)  +   HCl (aq)
 
16. Balance:        Al2(SO4)3 (aq)  + 3 BaCl2 (aq) --------> BaSO4 (s) + AlCl3 (aq)
 
17. Balance:        Cd(NO3)2 (aq)     +    H2S (l) -------->  CdS (s) +  HNO3 (aq)
 
18. Balance:         NaCl (aq) +  AgNO3 (aq) -------->   NaNO3 (aq) +    AgCl (s) 
 
19. Balance:      BaCl2 (aq) +    H2SO4 (aq) -------->   BaSO4 (s) +  HCl (aq)
 
20. Balance:          NaOH (aq) +   HCl (aq) -------->   NaCl (aq) +   H2O (l) 
 
21. Balance:     Na2CO3 (aq) +   HCl (aq) -------->   NaCl (aq)    +     H2O (l) +   CO2 (g) 
 
22. Balance:   1 H2SO4 (aq) + 2 NaOH (aq) --------> 2 H2O (l) + Na2SO4 (aq) 
 
23. Balance:         FeCl3 (aq) +   KOH (aq) -------->    Fe(OH)3 (s) +    KCl (aq)
 
24. Balance:          Na2SO3 (aq) +   HCl (aq) -------->   NaCl (aq) +  H2SO3 (l) 
 
25. Balance:        K2CrO4 (aq) + Pb(NO3)2 (aq) -------->   KNO3 (aq) + PbCrO4 (s) 
 
26. Balance:       NaC2H3O2 (aq) + HNO3 (aq) --------> HC2H3O2 (l) + NaNO3 (aq) 
 
27. Balance:       NaOH (aq) + NH4Cl (aq) --------> NaCl (aq) + NH3 (g)  +   H2O (l) 
 
28. Balance:        BiCl3 (aq) +   H2S (l) --------> Bi2S3 (s) +  HCl (aq) 
 
29. Balance:     K2C2O4 (aq) +   HCl (aq) -------->   KCl (aq) +  H2C2O4 (l) 
 
30. Balance:   H3PO4 (l) +   Ca(OH)2 (aq) -------->   H2O (l) +   Ca3(PO4)2 (s)
 
31.. Balance:    (NH4)2CO3 (aq) +   HBr (aq) -------->   NH4Br(aq) + H2O (l) +  CO2 (g) 
 
32. Balance:       (NH4)2CO3 (aq) + CaCl2 (aq) -------->  NH4Cl (aq) + CaCO3 (s)
 
xxxxxxx. Balance:        xxxxxxxx ______>   xxxxxxx 
 
xxxxxxx. Balance:        xxxxxxxx ______>   xxxxxxx 
 
xxxxxxx. Balance:        xxxxxxxx ______>   xxxxxxx 
 
xxxxxxx. Balance:        xxxxxxxx ______>   xxxxxxx 
 
xxxxxxx. Balance:        xxxxxxxx ______>   xxxxxxx 
 
xxxxxxx. Balance:        xxxxxxxx ______>   xxxxxxx 
 
xxxxxxx. Balance:        xxxxxxxx ______>   xxxxxxx 
 
xxxxxxx. Balance:        xxxxxxxx ______>   xxxxxxx 
 
xxxxxxx. Balance:        xxxxxxxx ______>   xxxxxxx 
 

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