CHAPTER 6 WRITING AND BALANCING CHEMICAL EQUATIONS

Tetracarbon decoxide vapor burns in air to produce carbon dioxide gas and water vapor.

2C₄H₁₀(g) + 13O₂(g) → 8CO₂(g) + 10H₂O(g)

Hydrogen gas reacts with oxygen gas to produce dihydrogen monoxide vapor.

2H₂ (g) + O₂ (g) → 2H₂O (g)

__BaCl₂(aq) + __Na₂SO₄(aq) --> __NaCl(aq) + __BaSO₄(s)

Aqueous barium chloride reacts with aqueous sodium sulfate to form sodium chloride solution and a precipitate of barium sulfate. 1, 1, 2, 1

__CaO + __H₂O --> __Ca(OH)₂

Calcium oxide reacts with water to form calcium hydroxide. 1, 1, 1

Solid silver oxide decomposes to produce solid silver metal and oxygen gas.

2Ag₂O(s) → 4Ag(s) + O₂ (g)

A piece of potassium metal reacts violently when placed in water. Hydrogen gas and an aqueous solution of potassium hydroxide are produced.

2K(s) + 2H₂O(L) → 2KOH(aq) + H₂(g)

Potassium phosphate solution mixes with barium chloride solution to produce aqueous potassium chloride and a precipitate of barium phosphate.

2K₃PO₄(aq) + 3BaCl₂(aq) →6KCl(aq) + Ba₃(PO₄)₂(s)

Magnesium burns in air to produce solid magnesium oxide.

2Mg(s) + O₂(g) → 2MgO(s)

When exposed to the air, a piece of iron metal converts to iron (III) oxide.

4Fe (s) + 3O₂ (g) → 2 Fe₂O₃ (s)

A piece of copper metal is dropped into hydrochloric acid solution to produce aqueous copper (II) chloride and hydrogen gas.

Cu(s) + 2HCl(aq) → CuCl₂(aq) + H₂(g)

__MgO + __SO₃ --> __MgSO₄

Magnesium oxide reacts with sulfur trioxide to form magnesium sulfate. Balanced as is.

Magnesium metal reacts with chlorine gas to produce solid magnesium chloride.

Mg(s) + Cl₂(g) → MgCl₂

__Na + __F₂ --> __NaF

Sodium reacts with fluorine to form sodium fluoride. 2, 1, 2