TEXT BOOK CHAP REVIEW problems
1.
The evolution of energy, the production of a gas, the formation of a precipitate, and a color change
3.
a. It is a number that appears in front of a formula in a chemical equation.
b. The number of atoms of each type in the formula is multiplied by the coefficient.
7.
a. a solution in water
b. a substance that accelerates a chemical reaction but can be recovered unchanged
c. a chemical reaction in which the products re-form the original reactants
11.
a. 2ZnS(s) 3O2(g) 2ZnO(s) 2SO2(g)
b. 2HCl(aq) Ba(OH)2(aq) BaCl2(aq) 2H2O(l )
c. 2HNO3(aq) Ca(OH)2(aq) Ca(NO3)2(aq) 2H2O(l )
13. a. H2 Cl2 2HCl
b. 2Al Fe2O3 Al2O3 2Fe
c. Pb(C2H3O2)2 H2S PbS 2H(C2H3O2)
15.
a. 4Al 3O2 2Al2O3
b. P4O10 6H2O4H3PO4
c. Fe2O3 3CO 2Fe 3CO2
18.
(1) In a synthesis reaction, two or more substances combine to form a new substance:
A X AX
(2) In a decomposition reaction, a single compound undergoes a reaction that produces two or more
simpler substances:
AX A X
(3) In a single-displacement reaction, one element replaces another element in a compound:
A BXAX B
or
Y BX BY X
(4) In a double-displacement reaction, the ions of two compounds exchange places in an aqueous solution to
form two new compounds:
AX BYBX AY
(5) In a combustion reaction, a substance combines with oxygen, releasing a large amount of
energy in the form of light and heat; for example,
C3H8(g) 5O2(g) 3CO2(g) 4H2O(g)
19.
by the addition of energy in the form of electricity or heat
20.
electrolysis
27.
a. H2 I2 2HI;
b. 2Li 2HCl 2LiCl H2;
c. Na2CO3 Na2O CO2;
d. 2HgO 2Hg O2;
e. Mg(OH)2 MgO H2O;
28.
a. magnesium hydroxide;
b. lead(II) hydroxide;
c. lithium chlorate;
d. barium chlorate;
35.
a. Ni(s) CuCl2(aq) NiCl2(aq) Cu(s)
b. Zn(s) Pb(NO3)2(aq) Zn(NO3)2(aq) Pb(s)
c. Cl2(g) 2KI(aq) 2KCl(aq) I2(s)
d. no reaction
e. Ba(s) 2H2O(l ) H2(g) Ba(OH)2(s)
synthesis
single displacement
decomposition
decomposition
decomposition
Mg(OH)2MgO H2O
Pb(OH)2 PbO H2O
2LiClO3 2LiCl 3O2
Ba(ClO3)2 BaCl2 3O2