Name
Name _________________________ Date ___________________
Class __________________________ Mr. D’Amico
Review Sheet Answer Key
Classify and complete the following chemical equations. Be sure to identify the reactions correctly and adjust the products according to your knowledge of the reaction.
1) 2(NH4)3PO4 (aq) + 3Ba(NO3)2 (aq) ( 6NH4NO3 (aq) + Ba3(PO4)2 (s)
2) 2AlPO4 (aq) + 3Ca(OH)2 (aq) ( 2Al(OH)3 (s) + Ca3(PO4)2 (s)
3) 2C2H6 (g) + 7O2 (g) ( 4CO2 (g) + 6H2O (l)
4) Al2(SO4)3 (aq) + ZnCl2 (aq) ( NR
5) Cu (s) + ZnSO4 (aq) ( NR
6) 2Fe (s) + Pb(NO3)4 (aq) ( 2Fe(NO3)2 (aq) + Pb (s)
7) Mg2Si (aq) + HCl (aq) ( NR
8) Cr (s) + Pb(NO3)2 (aq) ( Cr(NO3)2 (aq) + Pb (s)
9) 2Al (s) + 3CuSO4 (aq) ( Al2(SO4)3 (s) + 3Cu (s)
10) Ca(OH)2 (aq) + 2HCl (aq) ( CaCl2 (aq) + 2H2O (l)
Using your notes, give an example of both a composition and decomposition reaction. Make sure they are balanced as well.
Composition: 2H2 (g) + O2 (g) ( 2H2O (l)
Decomposition: 2NaCl (s) ( 2Na (s) + Cl2 (g)
11) What mass of carbon dioxide will be produced if 144 g of carbon react with 384 g of oxygen gas? Write a complete chemical equation representing this process.
C(s) + O2 (g) ( CO2(g)
144g + 384g = 528g
12) Which of the following is a synthesis reaction?
a) Cu(s) + 2AgNO3 (aq) ( Cu(NO3)2 (aq) + 2Ag (s)
b) 2Cu (s) + O2 (g) ( 2CuO
c) CuCO3 (s) ( CuO (aq) + CO2 (g)
d) CuO (aq) + H2 (g) ( Cu (s) + H2O (l)
13) A reaction in which two substances combine to form a single product is called a:
a) decomposition
b) synthesis
c) single replacement
d) double replacement
14) How many pounds of sulfur will be produced from the decomposition of 318.2 pounds of copper (I) sulfide to produce 254 pounds of copper metal and sulfur? Write a balanced chemical equation representing this transformation.
Cu2S (s) ( 2Cu (s) + S (s)
318.2 lb = 254 lb + 64.2 lb
15) Consider the following equation:
Mg2Si + HCl ( MgCl2 + SiH4
When the equation is balanced using the smallest whole number coefficients, the coefficient of HCl is:
a) 1 b) 2 c) 3 d) 4
16) In which category- composition, decomposition, single replacement, double replacement, or combustion- does the following reaction belong? Explain your answer.
3Cu + 2H2O + SO2 + O2 ( Cu3(OH)4SO2
Composition- many reactants, one product.
17) Predict the products of the following reaction using compound formulas:
Strontium hydroxide + tin (IV) sulfide ( strontium sulfide + tin (IV) hydroxide
2Sr(OH)2 (s) + SnS2 (s) ( 2SrS (s) + Sn(OH)4 (s)
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