37 terms

# Ch.7-Writing and balancing chemical equations and precipitation reaction equations

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During photosynthesis plants use carbon dioxide and water to make glucose and release oxygen. The equation for this reaction is:
6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂
When methane (CH₄) is burned on a stove in produces carbon dioxide and water. The equation for this reaction is:
CH₄(g) + 2 O₂(g) → CO₂(g) + 2 H₂O(g)
The reaction between solid silicon dioxide and solid carbon produces solid silicon carbide and carbon monoxide gas. The equation for this reaction is:
SiO₂(s) + 3 C(s) → SiC(s) + 2 CO(g)
The combustion of liquid octane (C₈H₁₈) produces gaseous carbon dioxide and water. The equation for this reaction is:
2 C₈H₁₈(l) + 25 O₂(g) → 16 CO₂(g) + 18 H₂O
The reaction between solid chromium(III) oxide and solid carbon produced solid chromium and carbon dioxide gas. The equation for this reaction is:
2 Cr₂O₃(s) + 3 C(s) → 4 Cr(s) + 3 CO₂(g)
Solid aluminum reacts with aqueous sulfuric acid to form aqueous aluminum sulfate and hydrogen gas. The equation for this reaction is:
2 Al(s) + 3 H₂SO₄ → Al₂(SO₄)₃ + 3 H₂
Solid iron reacts with aqueous hydrochloric acid to form aqueous iron(III) chloride and hydrogen gas. The equation for this reaction is:
2 Fe(s) + 6 HCl(aq) → 2 FeCl₃(aq) + 3 H₂(g)
Balance this chemical equation:
HCl(g) + O₂(g) → H₂O(l) + Cl₂
4 HCl(g) + O₂ → 2 H₂O + 2 Cl₂
Write an equation for when sodium carbonate ad copper(II) chloride are mixed. Does a precipitation reaction occur?
Na₂CO₃(aq) + CuCl₂(aq) → 2 NaCl(aq) + CuCO₃(s)
Write an equation for the reaction that occurs when lead(II) acetate and sodium sulfate are mixed. Does a precipitation reaction occur?
Pb(C₂H₃O₂)₂(aq) + Na₂SO₄(aq) → PbSO₄(s) + 2 Na(C₂H₃O₂)(aq)
Write an equation for the reaction that occurs when potassium hydroxide and nickel(II) bromide solutions are mixed. Does a precipitation reaction occur?
2 KOH(aq)+NiBr₂(aq) → Ni(OH)₂(s)+2 KBr(aq)
Write an equation for the reaction that occurs when solutions of ammonium chloride and iron(III) nitrate are mixed. Does a precipitation reaction occur?
3 NH₄Cl(aq) + Fe(NO₃)₃(aq) → 3 NH₄NO₃(aq) + FeCl₃(aq)
Write an equation for the reaction that occurs when solutions of potassium sulfate and strontium nitrate are mixed. Does a precipitation reaction occur?
K₂SO₄(aq) + Sr(NO₃)₂(aq) → 2 KNO₃(aq) + SrSO₄(s)
Balance the following:
Cr(s) + S₈(s) → Cr₂S₃
16 Cr(s) + 3 S₈(s) → 8 Cr₂S₃
Balance the following:
Fe₂S₃(s)+ HCl(g) → FeCl₃(s) + H₂S(g)
Fe₂S₃(s)+ 6 HCl(g) → 2 FeCl₃(s) + 3 H₂S(g)
Balance the following:
Na(s) + H₂O(l) → NaOH(aq) + H₂(g)
2 Na(s) + 2 H₂O(l) → 2 NaOH(aq) + H₂(g)
Balance the following and determine if there is a precipitation reaction occur when:
CuNO₃(aq) + KOH(aq) →
CuNO₃(aq)+ KOH(aq) → CuOH(s)+ KNO₃(aq)
Balance the following and determine if there is a precipitation reaction occur when:
Na₂S(aq) + CaCl₂(aq) →
Na₂S(aq) + CaCl₂(aq) → 2 NaCl(aq) + CaS(s)
Balance the following and determine if there is a precipitation reaction occur when:
Al(NO₃)₃(aq) + KOH(aq) →
Al(NO₃)₃ + 3KOH → Al(OH)₃(s) + 3KNO₃(aq)
Balance the following:
H₂O(l) → H₂(g) + O₂(g)
2 H₂O(l) → 2 H₂(g) + O₂(g)
Write a balanced equation for: Solid lead(II) sulfide reacts with aqueous hydrochloric acid to form solid lead(II) chloride and dihydrogen sulfide gas
PbS(s) + 2 HCl(aq) → PbCl₂(s) + H₂S(g)
Balance:
CO + H₂ → CH₄ + H₂O
CO + 3 H₂ → CH₄ + H₂O
Balance:
Fe₂O₃ + H₂ → Fe + H₂O
Fe₂O₃ + 3 H₂ → 2 Fe + 3 H₂O
Write a balanced equation for: Gaseous ammonia reacts with gaseous oxygen to form gaseous nitrogen monoxide and gaseous water
4 NH₃(g) + 5 O₂(g) → 4 NO(g) + 6 H₂O(g)
Write a balanced equation for:
Solid magnesium reacts with aqueous copper(I) nitrate to form aqueous magnesium nitrate and solid copper.
Mg(s) + 2 CuNO₃(aq) → Mg(NO₃)₂(aq) + 2 Cu(s)
Write a balanced equation for:
Gaseous dinitrogen pentoxide decomposes to form nitrogen dioxide and oxygen gas.
2 N₂O₅(g) → 4 NO₂(g) + O₂(g)
Balance:
Ca + HNO₃ → Ca(NO₃)₂ + H₂
Ca + 2 HNO₃ → Ca(NO₃)₂ + H₂
Balance:
CH₃OH + O₂ → CO₂ + H₂O
2 CH₃OH + 3 O₂ → 2 CO₂ + 4 H₂O
Balance:
Na₂S + Cu(NO₃)₂ → NaNO₃ + CuS
Na₂S + Cu(NO₃)₂ → 2 NaNO₃ + CuS
Balance:
HCl + O₂ → H₂O + Cl₂
4 HCl + O₂ → 2 H₂O + 2 Cl₂
Balance:
FeS + HCl → FeCl₂ + H₂S
FeS + 2 HCl → FeCl₂ + H₂S
Balance the following and determine if there is a precipitation reaction occur when:
Na₂CO₃ + Pb(NO₃)₂→
Na₂CO₃(aq) + Pb(NO₃)₂(aq) → PbCO₃(s) + 2 NaNO₃(aq)
Balance:
B₂O₃ + HF → BF₃ + H₂O
B₂O₃ + 6 HF → 2 BF₃ + 3 H₂O
Balance:
PH₃ + O₂ → P₄O₁₀ + H₂O
4 PH₃ + 8 O₂ → P₄O₁₀ + 6 H₂O
Write a balanced equation for: Aluminum metal reacts with iron(II) sulfide to form aluminum sulfide and iron metal.
2 Al + 3 FeS → Al₂S₃ + 3 Fe
Write a balanced equation for:
Calcium phosphate reacts with sulfuric acid to form calcium sulfate and phosphoric acid.
Ca₃(PO₄)₂ + 3 H₂SO₄ → 3 CaSO₄ + 2 H₃PO₄
Balance the following and determine if there is a precipitation reaction occur when:
K₂SO₄ + Pb(NO₃)₂ →
K₂SO₄(aq) + Pb(NO₃)₂(aq) → PbSO₄(s) + 2 KNO₃(aq)