Chemical Reactions
Write the balanced equation for the combustion of methane, natural gas (CH4) to produce carbon dioxide and water vapor. What type of reaction is this?
CH4(g) + 2O2(g) -->CO2(g) + 2H2O(g); combustion
Write the balanced equation for the reaction that produces iron (II) sulfide from iron and sulfur
Fe(s) + S(s) --> FeS(s)
Write the balanced equation for the reaction between iron (III) chloride and sodium hydroxide. What type of reaction is this?
FeCl3(aq) + 3NaOH(aq) --> Fe(OH)3(s) + 3NaCl(aq); double replacement
Write a balanced equation for the production of HCl gas from its elements
H2(g) + Cl2(g) --> 2HCl(g)
Write a balanced equation representing the formation of aqueous sulfuric acid from water and sulfur trioxide gas
H2O(l) + SO3(g) --> H2SO4(aq)
Using phosphoric acid and sodium hydroxide, write a balanced chemical reaction. What type of reaction is this?
H3PO4(aq) + 3NaOH(aq) --> Na3PO4 (aq) + 3H2O (or 3HOH) (l); neutralization
The double-replacement reaction below results in the formation of the precipitate lead chloride. Balance the equation and write the net ionic equation.
Pb(NO3)2(aq) + 2NH4Cl(aq) --> PbCl2(s) + 2NH4NO3(aq) net ionic: Pb+2(aq) + 2Cl-1 (aq) --> PbCl2(s)
Use the activity series of metals and nonmetals to predict whether the following reactions will occur. Write balanced equations for those that do, "NR" for those that do not.
a. Br2(l) + NaCl(aq) --> NR (Br lower than Cl on the activity series of non-metals) b. Ca(s) + Mg(NO3)2(aq) -->Ca(NO3)2(aq) + Mg(s) c. 2K(s) + H2SO4(aq) -->K2SO4(aq) + H2(g) d. Zn(s) + NaOH(aq) --> NR (Zn lower than Na on the activity series of metals)
Identify the precipitate formed when solutions of the following ionic compounds are mixed. If no precipitate is formed, write "no precipitate".
a. Zn(NO3)2 + SnCl2 --> Sn(NO3)2, are soluble) b. KCl + AgNO3 --> AgCl(s) + KNO3(aq) c. Cu(NO3)2 + Na2S --> CuS(s) + 2NaNO3(aq) d. Al2(SO4)3 + 3Mg(OH)2 --> 2Al(OH)3(s) + 3MgSO4(aq)
Magnesium reacts with HCl to form hydrogen and magnesium chloride. Write the balanced net ionic equation for this reaction.
balanced: Mg(s) + 2HCl(aq) --> H2(g) + MgCl2(aq) complete: Mg + H+1 + Cl-1 --> H2 + Mg+2 + Cl-1 net ionic: Mg(s) + 2H+1(aq) --> H2(g) + Mg+2(aq)
Write a sentence that completely describes the chemical reaction represented by this balanced equation. 2HCl(aq) + CaCO3(s) CO2(g) + CaCl2(aq) + H2O(l)
hydrochloric acid and solid calcium carbonate react to produce carbon dioxide, water, and aqueous calcium chloride
Write a balanced equation from this word equation. aqueous silver nitrate + copper metal --> silver metal + aqueous copper (II) nitrate
2AgNO3(aq) + Cu(s) --> 2Ag(s) + Cu(NO3)2(aq)
Write a balanced equation representing the reaction of magnesium with oxygen to produce magnesium oxide. What type of reaction is this?
2Cu(s) + O2(g) --> 2CuO(s); combination
Write the balanced equation for the reaction between hydrogen and oxygen that produces water
2H2(g) + O2(g) --> 2H2O (l)
Write the balanced equation for the reaction between hydrochloric acid and calcium metal. What type of reaction is this?
2HCl(aq) + Ca(s) -->CaCl2(aq) + H2(g); single replacement
Write the balanced equation for the production of oxygen gas and sodium chloride from the decomposition of sodium hypochlorite. What type of reaction is this?
2NaClO(aq) -->2NaCl(aq) + O2(g); decomposition
Write a balanced equation from this word equation. phosphorus + oxygen --> tetraphosphorus decoxide
4P(s) + 5O2(g) --> P4O10(g)
Write the balanced equation representing the heating of magnesium carbonate to produce solid magnesium oxide and carbon dioxide gas
MgCO3(s) --> MgO(s) + CO2(g)
Write the net ionic equation for the reaction between aqueous barium nitrate, Ba(NO3)2, and aqueous sodium sulfate, Na2SO4.
balanced: Ba(NO3)2(aq) + Na2SO4(aq) --> 2NaNO3(aq) + BaSO4(s) complete: Ba+2 + NO3-1+ Na+1 + SO4-2 --> Na+1 + NO3-1+ BaSO4 net ionic: Ba+2(aq) + SO4-2 (aq) --> BaSO4(s)
