Honors Chemistry I
Reaction Prediction Worksheet
For the following reactants: (1) tell the type of reaction; (2) predict the products (if no reaction, write
NR);
(3) write the net ionic equation for all ppt. reactions. Make sure to include the proper state of
matter for all rectants and products. If no state is indicated for compounds, they are assumed to be in
aqueous solution (aq).
1. mixing solutions of lead nitrate and potassium chloride
DR
Pb+2(aq) + 2 Cl-1(aq)
 PbCl2(s)
2. dropping solid magnesium metal into hydrochloric acid
SR
Mg(s) + 2 H+1(aq)
 Mg+2(aq) +
H2(g)
3. adding solid tin to sulfuric acid
SR
Sn(s) + 2 H+1(aq)
 Sn+2(aq) +
H2(g)
4. bubbling chlorine gas into hydrobromic acid
SR
Cl2(g) + 2 Br-1(aq)
 2 Cl-1(aq) +
Br2(liq)
5. passing sulfur dioxide gas over solid calcium oxide
SYN
SO2(g)
+ CaO(s)  CaSO3(s)
6. putting solid lithium oxide into water
SYN
Li2O(s)
+ H2O(liq)  2 Li+1(aq) +
2 OH-1(aq) or 2LiOH(aq)
7. heating silver oxide
DEC
2 Ag2O(s)

4 Ag(s) +
O2(g)
8. heating sodium oxide
DEC
No Reaction I-A oxides are too stable
9. heating strontium sulfate
DEC
No Reaction II-A sulfates are too stable
10. combining barium with iodine and heating
SYN
Ba(s)
+ I2(s)  BaI2(s)

-211. adding platinum metal to phosphoric acid
No Reaction Pt is less active than hydrogen.
SR
12. dropping calcium metal into hot water (steam)
SR
+ H2O(g) 
Ca(s)
CaO(s)
+
H2(g)
13. heating calcium carbonate
CaCO3(s) 
DEC
CaO(s) + CO2(g)
14. running A.C. current through a solution of silver acetate
DEC
No Reaction Electrolysis requires direct current - D.C. because the reduction process needs a steady stream of electrons
15. mixing solutions of sodium carbonate and potassium chlorate
DR
No Reaction No evidence of a reaction.
16. adding zinc metal to a solution of magnesium chloride
SR
No Reaction
Zinc is less active than magnesium.
17. mixing solutions of nickel(II) nitrate and barium sulfate
DR
No Reaction
18. mixing solutions of silver nitrate and sodium hydroxide
DR
Ag(aq)+1 +
OH-1(aq)
 AgOH(s)
19. bubbling dinitrogen pentoxide through water
SYN
N2O5(g)
+ H2O(liq) 
2 HNO3(aq)  2 H+1(aq) + 2 NO3-1(aq)
20. passing oxygen gas over solid sulfur
SYN
O2(g)
+ S(s)  SO2(g)
21. heating solid ferric nitrate
DEC
4Fe(NO3)3(s)  2Fe2O3(s) + 3O2(g) +
Fe(NO3)3(s)  FeO(s) + O2(g) + 3NO2(g)
12NO2(g)
-322. mixing solutions of potassium nitrate and zinc phosphate
DR
No Reaction
Zinc phosphate is insoluble; need both reactants
to be soluble to exchange ions.
23. combining solid silver and barium
SYN
No Reaction Two metals do not chemically combine;
they only physically combine to make an alloy.
24. zinc carbonate heated
DEC
ZnCO3(s)  ZnO(s) +
CO2(g)
25. adding solid silver to a solution of mercurous nitrate
SR
No Reaction. Ag is less active than Hg+1
26. mixing solutions of plumbous chlorate and sodium sulfide
DR
Pb(aq)+2 + S-2(aq)
 PbS(s)
27. mixing solutions of ferric hydroxide and nitric acid
DR
Fe(OH)3(s) + H+1(aq)
 Fe(aq)+3 + H2O(liq)
28. passing neon gas over solid potassium
SYN
No Reaction Inert gases do not react - at least the light ones.
(The heavy ones only react under extremes conditions!)
29. mixing solutions of ammonium acetate and ferrous chloride
DR
No Reaction
No evidence of a reaction.
30. adding solid strontium carbonate to concentrated hydrochloric acid
DR
SrCO3(s) + 2H+1(aq)
 Sr(aq)+2 + H2O(liq) +
CO2(g)
31. dropping solid silver into dilute nitric acid
SR
No Reaction
Ag is less active than hydrogen.
32. adding solid iodine to water
SR
No Reaction
I2 is less active than oxygen.
-433. a solution of nickel (II) chlorate has hydrogen sulfide gas bubbled into it
Ni(aq)+2 + H2S(g)
DR
 NiS(s) + 2 H+1(aq)
34. electrolyzing water
DEC
2 H2O(liq)
2 H2(g) +
DC
O2(g)
35. solid cobalt (II) chloride is added to water
DR
No Reaction
This is a simple dissolution - no chemical rxn.
36. solid mercuric sulfide is added to a hydrochloric acid solution
DR
No Reaction HgS is insoluble - even in acids; need both
reactants to be soluble to exchange ions.
37. solutions of potassium dichromate and hydrochloric acid are mixed
DR
No Reaction
No evidence of a reaction.
38. solutions of hydriodic acid and perchloric acid are mixed
DR
No Reaction This is a simple dissolution - no chemical rxn.
39. solid potassium iodate has hydrogen gas passed over it
SR
No Reaction H2 is less active than potassium.
40. solid molybdenum(VI) oxide is added to a solution of sulfuric acid
DR
MoO3(s) + H+1(aq)
 Mo(aq)+6
+
H2O(liq)
41. carbon monoxide gas and oxygen gas are mixed at a high temperature
SYN
2 CO(g)
+
O2(g)
 2 CO2(g)
42. running D.C. current through molten potassium iodide (a liquid form)
DEC
2 KI(liq)
DC
2 K(s) + I2(s)