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WRITE THE FORMULA FOR EACH MATERIAL CORRECTLY AND THEN BALANCE THE EQUATION. THERE ARE SOME REACTIONS THAT REQUIRE COMPLETION. FOR EACH REACTION TELL WHAT TYPE OF REACTION IT IS.

1. sulfur trioxide and water combine to make sulfuric acid.

2. lead II nitrate and sodium iodide react to make lead iodide and sodium nitrate.

3. calcium fluoride and sulfuric acid make calcium sulfate and hydrogen fluoride (Hydrofluoric acid)

4. calcium carbonate will come apart when you heat it to leave calcium oxide and carbon dioxide.

5. ammonia gas when it is pressed into water will make ammonium hydroxide.

6. sodium hydroxide neutralizes carbonic acid

7. zinc sulfide and oxygen become zinc oxide and sulfur.

8. lithium oxide and water make lithium hydroxide

9. aluminum hydroxide and sulfuric acid neutralize to make water and aluminum sulfate.

10. sulfur burns in oxygen to make sulfur dioxide.

11. barium hydroxide and sulfuric acid make water and barium sulfate.

12. aluminum sulfate and calcium hydroxide become aluminum hydroxide and calcium sulfate.

13. copper metal and silver nitrate react to form silver metal and copper II nitrate.

14. sodium metal and chlorine react to make sodium chloride.

15. calcium phosphate and sulfuric acid make calcium sulfate and phosphoric acid.

16. phosphoric acid plus sodium hydroxide.

17. propane burns (with oxygen)

18. zinc and copper II sulfate yield zinc sulfate and copper metal

19. sulfuric acid reacts with zinc

20. acetic acid ionizes.

21. steam methane to get hydrogen and carbon dioxide

22. calcium oxide and aluminum make aluminum oxide and calcium

23. chlorine gas and sodium bromide yield sodium chloride and bromine

ANSWERS TO EQUATIONS

1. SO3 + H2O H2SO4
SYNTHESIS

2. Pb(NO3)2 + 2NaI PbI2 + 2NaNO3
DOUBLE REPLACEMENT (lead II iodide precipitates)

3. CaF2 + H2SO4 CaSO4 + 2 HF
DOUBLE REPLACEMENT (calcium sulfate precipitates)

4. CaCO3 CaO + CO2
DECOMPOSITION

5. NH3 + H2O NH4OH
SYNTHESIS

6. 2 NaOH + H2CO3 Na2CO3 + 2 H2O
DOUBLE REPLACEMENT OR ACID-BASE NEUTRALIZATION

7. 2 ZnS + O2 2 ZnO + 2 S
ANIONIC SINGLE REPLACEMENT

8. Li2O + H2O 2 LiOH
SYNTHESIS

9. 2 Al(OH)3 + 3 H2SO4 6 H2O + Al2(SO4)3
DOUBLE REPLACEMENT OR ACID-BASE NEUTRALIZATION

10. S + O2 SO2
SYNTHESIS

11. Ba(OH)2 + H2SO4 2 H2O + BaSO4
DOUBLE REPLACEMENT OR ACID-BASE NEUTRALIZATION

12. Al2(SO4)3 + 3 Ca(OH)2 2 Al(OH)3 + 3 CaSO4
DOUBLE REPLACEMENT
(BOTH calcium sulfate and aluminum hydroxide are precipitates.)

13. Cu + 2AgNO3 2Ag + Cu(NO3)2
CATIONIC SINGLE REPLACEMENT

14. 2Na + Cl2 2 NaCl
SYNTHESIS

15. Ca3(PO4)2 + 3 H2SO4 3 CaSO4 + 2 H3PO4
DOUBLE REPLACEMENT

16. H3(PO4) + 3 NaOH Na3PO4 + 3 H2O
DOUBLE REPLACEMENT (NEUTRALIZATION)

17. C3H8 + 5 O2 4 H2O + 3 CO2
BURNING OF A HYDROCARBON

18. Zn + CuSO4 ZnSO4 + Cu
CATIONIC SINGLE REPLACEMENT

19. H2SO4 + Zn ZnSO4 + H2
CATIONIC SINGLE REPLACEMENT

20. HC2H3O2 H+ + (C2H3O2)-
IONIZATION (NOTICE THAT IT IS REVERSIBLE)

21. 2 H2O + CH4 4 H2 + CO2

22. 3 CaO + 2 Al Al2O3 + 3 Ca
CATIONIC SINGLE REPLACEMENT

23. Cl2 + 2 NaBr 2 NaCl + Br2
ANIONIC SINGLE REPLACEMENT