The Diatomic Elements have two atoms per molecule when they are FREE (that is all by themselves):
H2 O2 N2 Cl2 Br2 I2 F2
The other elements when free are Monatomic. Ex. Fe Zn Cu Co Al
Example of above: Iron + Bromine ---> Ferric bromide, 2Fe + 3Br2 ---> 2FeBr3
Common Acids: Sulfuric H2SO4, Nitric HNO3, Acetic HC2H3O2, Hydrochloric HCl, Phosphoric H3PO4
Write the correct formulae and balance the following reactions:
Watch out for Diatomic Elements and be sure your formulas are correct!!!
*** THEN... CHECK EACH ANSWER BELOW ***
Synthesis reactions--
(Elements combine to form a compound):
1. Sodium + Chlorine ---> Sodium chloride
2. Magnesium + Oxygen ---> Magnesium oxide
3. Iron + Sulfur ---> Ferric sulfide
4. Cobalt + Bromine --->
Decomposition reactions--
(A compound breaks up into its elements):
5. Nickel chloride ---> Nickel + Chlorine
6. Aluminum hydroxide ---> Al + O2 + H2
7. Sulfuric acid --->
8. Ammonium hydroxide --->
Single Displacement--
(An element replaces another from a compound):
9. Aluminum + Cupric nitrate ---> Aluminum nitrate + Copper
10. Zinc + Hydrochloric acid --->
11. Sodium + Water ---> Sodium hydroxide + Hydrogen
12. Cobalt + Calcium sulfide --->
Double displacement--
(Two compounds react and exchange partners):
13. Ferric chloride + Cobalt hydroxide ---> Ferric hydroxide + Cobalt chloride
14. Silver nitrate + Manganese silicate --->
15. Magnesium carbonate + Sulfuric acid --->
.
.
Hydrolysis reactios--
(Add water as HOH):
16. Potassium acetate + Water ---> Potassium hydroxide + Hydrogen acetate
17. Ferrous iodide + Water --->
18. Ammonium sulfate + Water --->
Mixed reactions--
19. Aluminum + Ferric oxide --->
20. Silver sulfate + Copper --> Cupric sulfate +?
21. Mercury + Nitric acid --->
22. Sodium hydroxide + Zinc phosphate --->
23. Potassium + water (HOH) --->
24. Combustion of C8H18 (burn it)
25. Lead nitrate + Sulfuric acid --->
26. Cadmium chromate + Arsenic oxide --->
27. Silver sulfide + Silicon permanganate--->
28. Carbon nitrate + Barium dichromate --->
29. Combustion of C7H16 (burn it)
30. Arsenic cyanide ---->
31. Sodium nitride + Bromine --->
32. Ferrous sulfide + Strontium iodide --->
33. Hydrogen + Oxygen ---> Water
34. Antimony + Lead fluoride --->
35. Aluminum bicarbonate --->
36. Ammonium ferrocyanide + Cobalt oxide --->
37. Silver chromate + Arsenic thiocyanate --->
38. Water --->
39. Nickel nitride + Cobalt hydroxide --->
40. Sodium iodide --->
Answers to Equations Practice
WRITE THEM FIRST!!! , Then check them out
1. 2 Na + Cl2 ---> 2 NaCl
2. 2 Mg + O2 ---> 2 MgO
3. 2 Fe + 3 S ---> Fe2S3
4. Co + Br2 ---> CoBr2
5. NiCl2 ---> Ni + Cl2
6. 2 Al(OH)3 ---> 2 Al + 3 O2 + 3 H2
7. H2SO4 ---> H2 + S + 2 O2
8. 2 NH4OH ---> N2 + 5 H2 + O2
.
9. 2 Al + 3 Cu(NO3)2 ---> 2 Al(NO3)3 + 3 Cu
10. Zn + 2 HCl ---> ZnCl2 + H2
11. 2 Na + 2 HOH ---> 2 NaOH + H2
12. Co + CaS ---> CoS + Ca
13. 2 FeCl3 + 3 Co(OH)2 ---> 2 Fe(OH)3 + 3 CoCl2
14. 4 AgNO3 + Mn2SiO4 ---> Ag4SiO4 + 2Mn(NO3)2
15. MgCO3 + H2SO4 ---> MgSO4 + H2CO3
16. KC2H3O2 + HOH ---> KOH + HC2H3O2
17. FeI2 + 2 HOH ---> Fe(OH)2 + 2 HI
18. (NH4)2SO4 + 2 HOH ---> 2 NH4OH + H2SO4
19. 2 Al + Fe2O3 ---> Al2O3 + 2 Fe
20. Ag2SO4 + Cu ---> CuSO4 + 2 Ag
21. 2 Hg + 2 HNO3 ---> 2 HgNO3 + H2
22. 6 NaOH + Zn3(PO4)2 ---> 3 Zn(OH)2 + 2 Na3PO4
23. 2 K + 2 HOH ---> 2 KOH + H2
24. 2 C8H18 + 25 O2 ---> 16 CO2 + 18 H2O
25. Pb(NO3)2 + H2SO4 ---> PbSO4 + 2 HNO3
26. 3 CdCrO4 + As2O3 ---> As2(CrO4)3 + 3 CdO
27. 2 Ag2S + Si(MnO4)4 ---> 4 AgMnO4 + SiS2
28. C(NO3)4 + 2 BaCr2O7 ---> 2 Ba(NO3)2 + C(Cr2O7)2
29. C7H16 + 11 O2 ---> 7 CO2 + 8 H2O
30. 2 As(CN)3 ---> 2 As + 6 C + 3 N2
31. 2 Na3N + 3 Br2 ---> 6 NaBr + N2
32. FeS + SrI2 ---> FeI2 + SrS
33. 2 H2 + O2 ---> 2 H2O
34. 2 Sb + 3 PbF2 ---> 2 SbF3 + 3 Pb
35. 2 Al(HCO3)3 ---> 2 Al + 3 H2 + 6 C + 9 O2
36. (NH4)4Fe(CN)6 + 2 CoO ---> Co2Fe(CN)6 + 2 (NH4)2O
37. 3 Ag2CrO4 + 2 As(SCN)3 ---> 6 AgSCN + As2(CrO4)3
38. 2 H2O ---> 2 H2 + O2
39. Ni3N2 + 3 Co(OH)2 ---> Co3N2 + 3 Ni(OH)2
40. 2NaI ---> 2 Na + I2