Multiple Choice Identify the
letter of the choice that best completes the statement or answers the question.
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General Solubility
Guidelines | 1. Most sodium, potassium, and ammonium compounds are soluble in
water. | 2. Most nitrates, acetates, and chlorates are soluble.
| 3. Most chlorides are soluble,
except those of silver, mercury(I), and lead. Lead(II) chloride is soluble in hot
water. | 4. Most sulfates are soluble, except those of barium, strontium, and
lead. | 5. Most carbonates, phosphates, and silicates are insoluble, except those of sodium,
potassium, and ammonium. | 6. Most sulfides are insoluble, except those of calcium, strontium, sodium, potassium, and
ammonium. | |
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1.
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A chemical reaction has NOT occurred if the products have
a. | the same mass as the reactants. | b. | less total bond energy than the
reactants. | c. | more total bond energy than the reactants. | d. | the same chemical
properties as the reactants. |
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2.
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Which observation does NOT indicate that a chemical reaction has
occurred?
a. | formation of a precipitate | c. | evolution of heat and
light | b. | production of a gas | d. | change in total mass of substances |
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3.
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A solid produced by a chemical reaction in solution that separates from the
solution is called
a. | a precipitate. | c. | a molecule. | b. | a reactant. | d. | the mass of the
product. |
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4.
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After the correct formula for a reactant in an equation has been written,
the
a. | subscripts are adjusted to balance the equation. | b. | formula should not
be changed. | c. | same formula must appear as the product. | d. | symbols in the
formula must not appear on the product side of the equation. |
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5.
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What is the small whole number that appears in front of a formula in a chemical
equation?
a. | a subscript | c. | a ratio | b. | a superscript | d. | a coefficient |
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6.
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A chemical equation is balanced when the
a. | coefficients of the reactants equal the coefficients of the
products. | b. | same number of each kind of atom appears in the reactants and in the
products. | c. | products and reactants are the same chemicals. | d. | subscripts of the
reactants equal the subscripts of the products. |
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7.
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Which of the following is a formula equation for the formation of carbon dioxide
from carbon and oxygen?
a. | Carbon plus oxygen yields carbon dioxide. | b. | C + O2
® CO2 | c. | CO2 ® C + O2 | d. | 2C + O ®
CO2 |
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8.
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Which coefficients correctly balance the formula equation
NH4NO2(s)® N2(g) +
H2O(l)?
a. | 1, 2, 2 | c. | 2, 1, 1 | b. | 1, 1, 2 | d. | 2, 2, 2 |
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9.
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After the first steps in writing an equation, the equation is balanced by
a. | adjusting subscripts to the formula(s). | b. | adjusting
coefficients to the smallest whole-number ratio. | c. | changing the products
formed. | d. | making the number of reactants equal to the number of
products. |
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10.
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What is the balanced equation for the combination of sulfur with oxygen to
produce sulfur dioxide?
a. | S(s) + O2(g) ®
SO(g) | c. | 2S(s) + 3O2(g) ®
SO3(s) | b. | S(s) + O2(g) ® SO2(g) | d. | S(s) + 2O2(g) ®
SO42–(aq) |
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11.
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Symbols used in equations, together with the explanations of the symbols, are
shown below. Which set is correct?
a. | (g), grams | c. | (aq), dissolved in water | b. | (l),
liters | d. | (s), soluble |
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12.
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In the chemical equation H O ( aq) ® H O( l) O ( g), the is a ____.
a. | catalyst | c. | product | b. | solid | d. | reactant |
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13.
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If you rewrite the following word equation as a balanced chemical equation, what
will the coefficient and symbol for fluorine be? nitrogen trifluoride nitrogen fluorine
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14.
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In every balanced chemical equation, each side of the equation has the same
number of ____.
a. | atoms of each element | c. | moles | b. | molecules | d. | coefficients |
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15.
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What are the missing coefficients for the skeleton equation below?
Al (SO ) ( aq)
KOH( aq) ® Al(OH) ( aq) K SO ( aq)
a. | 1, 3, 2, 3 | c. | 4, 6, 2, 3 | b. | 2, 12, 4, 6 | d. | 1, 6, 2, 3 |
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16.
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The product of a combination reaction is Ba(OH) . If
one of the reactants is H O, what is the other reactant?
a. | BaO | c. | BaH | b. | BaO | d. | BaO |
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17.
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Which of the following pairs of solutions produces a precipitate when
combined?
a. | KOH and NH4Cl | c. | NH4Cl and
AgNO3 | b. | Na2SO4 and KCl | d. | Fe(NO)3 and
KCl |
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18.
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What is the driving force in the following reaction? Ni(NO ) ( aq) K S( aq) NiS (s) 2KNO ( aq)
a. | Ionic compounds are products. | c. | A precipitate is
formed. | b. | A gas is formed. | d. | Ionic compounds are reactants. |
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19.
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Which of the following is NOT a net ionic equation?
a. | Fe2+(aq) + 2Cl–(aq) +
2OH–(aq) ® Fe(OH)2(s) +
2Cl–(aq) | b. | Ag+(aq) +
Cl–(aq) ® AgCl(s) | c. | Cu2+(aq) + S2–(aq) ® CuS(s) | d. | 3Ca2+(aq) +
2P3–(aq) ®
Ca3P2(s) |
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20.
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A double-replacement reaction takes place when aqueous Na CO reacts with aqueous Sn(NO ) . You would expect one of the products
of this reaction to be ____.
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21.
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The equation 2C H OH 9O 6CO 8H O is an example of which type of reaction?
a. | single-replacement reaction | c. | decomposition
reaction | b. | double-replacement reaction | d. | combustion reaction |
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22.
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When solutions of two ionic compounds are combined and a solid forms, the
process is called
a. | dissociation. | c. | precipitation. | b. | solvation. | d. | hydration. |
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23.
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What is the net ionic equation for the precipitation reaction between copper(II)
chloride and sodium hydroxide?
a. | Na+(aq) + Cl–(aq) ® NaCl(s) | c. | Cu2+(aq) +
2OH–(aq) ®
Cu(OH)2(s) | b. | Cu2+(aq) +
2Cl–(aq) + 2Na+(aq) + 2OH–(aq)
® Cu(OH)2(s) + 2NaCl(s) | d. | Cu2+(aq) +
2OH–(aq) + 2Cl–(aq) ®
Cu(OH)2(s) + 2Cl–(aq) |
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24.
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Which of the following dissociates in water?
a. | AgCl | c. | MgCO3 | b. | NaCl | d. | BaSO4 |
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25.
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What is the spectator ion in the equation 2Na+(aq) +
S2–(aq)+ Zn2+(aq) +
2NO3–(aq)® 2Na+(aq)+
2NO3-(aq) + ZnS(s)?
a. | S2–(aq) | c. | Na+(aq) | b. | ZnS(s) | d. | none of these |
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26.
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In a double-replacement reaction, the ____.
a. | products are a new element and a new compound | c. | reactants are usually two ionic
compounds | b. | reactants are two elements | d. | products are always carbon dioxide and water |
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27.
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In a combustion reaction, one of the reactants is always ____.
a. | a metal | c. | hydrogen | b. | oxygen | d. | nitrogen |
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28.
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The type of reaction that takes place when one element reacts with a compound to
form a new compound and a different element is a ____.
a. | single-replacement reaction | c. | decomposition
reaction | b. | double-replacement reaction | d. | combination/synthesis reaction |
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Matching
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Match each equation with its correct type a. | synthesis | c. | single replacement | b. | acid-base reaction/double
replacement | d. | precipitation
reaction/double replacement |
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29.
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HPO
(aq) 3KOH(aq) KPO(aq) 3HO(l)
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30.
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2H2(g) + O2(g) 2H2O(g)
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31.
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Ba(NO)(aq) KSO4(aq)
BaSO4(s)
2KNO(aq)
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32.
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Mg(s) 2HCl(aq) MgCl(aq) H(g)
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