Writing and Balancing Chemical Equations Chemistry 110

Home , Potassium sulfite, Sodium oxide, Zinc sulfate

I] On the line at the left, write the letter corresponding to the reaction type: (A) combination/Synthesis (B) decomposition (C) replacement/single replacement (D) double displacement (E) combustion of an organic fuel PLUS II] Write and balance the following chemical equations..... A. using correct chemical formulas and B. correct physical states for reactants and products { (g),(l),(s), and (aq) }

__E__ 1) Gaseous C4H8 + oxygen gas ---> carbon dioxide + water

C4H8(g) + 6O2(g) ---> 4CO2(g) + 4H2O(g)

__C__ 2) Gaseous chlorine + solid cobalt (III) iodide --> iodine + cobalt (III) chloride

3Cl2(g) + 2CoI3(s) ---> 3I2(s) + 2CoCl3(aq)

__A__ 3) Solid diphosphorus pentoxide + water(l) ---> phosphoric acid

P2O5(s) + 3H2O(l) ---> 2H3PO4(aq)

__D_ 4) Sulfurous Acid + aqueous potassium hydroxide ---> water + potassium sulfite

H2SO3(aq) + KOH(aq) ---> 2H2O(l) + K2SO3(aq)

__D_ 5) Aqueous potassium phosphate + aqueous ferrous chloride ---> potassium chloride + ferrous phosphate

2K3PO4(aq) + 3FeCl2(aq) ---> 6KCl(aq) + Fe3(PO4)2(s)

__E__ 6) Liquid C6H6 + oxygen --> carbon dioxide + water

2C6H6(l) + 15O2(g) ---> 12CO2(g) + 6H2O(g)

__A__ 7) Magnesium metal + nitrogen ---> magnesium nitride

3Mg(s) + N2(g) ---> Mg3N2(s)

__D__ 8) Aqueous sodium sulfate + aqueous lead (II) nitrate--->sodium nitrate + lead (II) sulfate

Na2SO4(aq) + Pb(NO3)2(aq) ---> 2NaNO3(aq) + PbSO4(s)

__C__ 9) Solid potassium bromide + chlorine gas ---> bromine + potassium chloride

2KBr(s) + Cl2(g) --->Br2(l) + 2KCl(s) B __B__ 10) Solid mercury (II) oxide ---> mercury metal + oxygen

2HgO(s) ---> 2Hg(l) + O2(g)

__D__ 11) Phosphoric acid + aqueous barium hydroxide ---> water + barium phosphate

2H3PO4(aq) + 3Ba(OH)2(aq) ---> 6H2O(l) + Ba3(PO4)2(s)

__A__ 12) Solid sodium oxide + water(l) ---> sodium hydroxide

Na2O(s) + H2O(l) ---> 2NaOH(aq)

__B__ 13) Solid aluminum chloride---> aluminum + chlorine

2AlCl3(s) ---> 2Al(s) + 3Cl2(g)

__C__ 14) Zinc metal and aqueous cupric sulfate reacts to form copper plus zinc sulfate

Zn(s) + CuSO4(aq) ---> Cu(s) + ZnSO4(aq)

__A__ 15) Manganese metal reacts with oxygen gas to form manganese (II) oxide

2Mn(s) + O2(g) ---> 2MnO(s)

__D__ 16) Gaseous dihydrogen sulfide is bubbled through aqueous copper (II) nitrate to produce copper (II) sulfide and nitric acid

H2S(g) + Cu(NO3)2(aq) ---> CuS(s) + 2HNO3(aq)

__B__ 17) Solid Iron (III) hydroxide is heated to produce gaseous water and iron (III) oxide

2Fe(OH)3(s) ---> 3H2O(g) + Fe2O3(s)

__E__ 18) Gaseous methane ,CH4, is ignited in oxygen to produce carbon dioxide and water

CH4(g) + 2O2(g) ---> CO2(g) + 2H2O((g)

__B__ 19) Sulfurous acid breaks down into water and sulfur dioxide gas

H2SO3(aq) ---> H2O(l) + SO2(g)

__C__ 20) Calcium metal + water (l) ---> calcium hydroxide + hydrogen

Ca(s) + 2H2O(l) ---> Ca(OH)2(aq) + H2(g)