Balance and classify the following reactions according to the type of reaction:

Question

Balance and classify the following reactions according to the type of reaction: combination or synthesis (S), decomposition (D), combustion (C), single replacement (Sr), or double replacement (Dr).

1. Completed reactions:                                                                                        Classification

_____Al(s) + _____ZnCl2(aq) ? _____AlCl3(aq) + _____Zn(s)                                        ____________________

_____AgNO3(aq) + _____CaCl2(aq) ? _____AgCl(s) + _____Ca(NO3)2(aq)                        ____________________

_____C2H6(g) + ______O2(g) ? _____CO2(g) + ______H2O(l)                                          ____________________

______Na2O(s) + ______H2O(l) ? ______NaOH(aq)                                                    ____________________

______KClO3(s) ? ______KCl(s) + ______O2(g)                                                          ____________________

______Mg(s) + ______HCl(aq) ? ______MgCl2(aq) +______H2(g)                                   ____________________

______C3H6O(g) +______O2(g) ? _____CO2(g) + ______H2O(l)                                 ____________________

______Fe(s) + ______O2(g) ? ______Fe2O3(s)                                                            ____________________

______Cl2(g) + ______KBr(aq) ?   ______Br2(aq) + ______ KCl(aq)                                 ____________________

______Ca(NO3)2(aq) + ______K3PO4(aq) ? ______Ca3(PO4)2(s) + ______KNO3(aq)     ____________________

2) Classify the reaction and predict the possible products, then balance the reactions:

______BaCl2(aq) + ______ Na2SO4(aq) ?      ___________________________________ ____________________

______Fe(s) + ______CuCl2(aq) ?    ___________________________________________   ____________________

______C6H6(l) + ______O2(g) ?       ___________________________________________   ____________________

______CO (s) + ______Cl2(g) ?        ___________________________________________   ____________________

______CaCO3 (s) ?    _______________________________________________________     ____________________

3) The Haber process for the preparation of ammonia involves a combination reaction between nitrogen and hydrogen.    Write the balanced molecular equation for the reaction.

4) The combustion of octane. Write the balanced molecular equation for the reaction.

5) Write a theory of the experiment by writing a brief summary of the discussion explain how to balance reactions, how to identify reactions and the five types of reactions.

Explanation / Answer

Ans 1

2Al(s) + 3ZnCl2(aq) ? 2AlCl3(aq) + 3Zn(s)   

single replacement

2AgNO3(aq) + CaCl2(aq) ? 2AgCl(s) + Ca(NO3)2(aq)

double replacement

2C2H6(g) + 7O2(g) ? 4CO2(g) + 6H2O(l)

double replacement

Na2O(s) + H2O(l) ?2 NaOH(aq)

synthesis

2KClO3(s) ? 2KCl(s) + 3O2(g)

decomposition

Mg(s) + 2HCl(aq) ? MgCl2(aq) + H2(g)

single replacement

C3H6O(g) + 4O2(g) ?3 CO2(g) + 3H2O(l)

double replacement

4Fe(s) + 3O2(g) ? 2Fe2O3(s)   

synthesis

Cl2(g) + 2KBr(aq) ? Br2(aq) + 2 KCl(aq)

single replacement

3 Ca(NO3)2(aq) + 2 K3PO4(aq) = Ca3(PO4)2(s) + 6 KNO3(aq)
double replacement

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