Answers2026-2027_MDCPS_2003345_Chemistry_1_B-CRLab: Solubility

Lab: Solubility — Unit test Answers

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1
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Which best explains why water has a much higher boiling point than would otherwise be predicted?

A
Water forms weak hydrogen bonds.
B
Water forms strong hydrogen bonds.
C
Water has weak cohesive forces.
D
Water has strong adhesive forces.
2
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Which of these factors will cause a solid solute to dissolve faster?

A
increasing the air temperature
B
increasing the amount of solute
C
increasing the amount of solvent
D
increasing the surface area of solute
3

Which term refers to the formation of ions as a result of a chemical reaction?

A
dissociation
B
electrolyte
C
hydration
D
ionization
4

Which describes the polarity in a water molecule?

A
partial negative charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms
B
partial negative charge on the oxygen atom because it pulls electrons from the hydrogen atoms
C
partial positive charge on the oxygen atom because it pulls electrons from the hydrogen atoms
D
partial positive charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms
5

Which is the chemical formula for nickel(II) nitrate hexahydrate?

A
Ni(NO3)2•7H2O
B
Ni(NO3)3•4H2O
C
Ni(NO3)2•6H2O
D
Ni(NO3)3•6H2O
6

How are super-absorbent polymers useful in fuel filters?

A
They add water to the fuel line to dilute gas.
B
They stop excess oil from reaching the engine.
C
They repel water to protect the filter from rusting.
D
They remove harmful moisture before it reaches the engine.
7

The table shows the characteristics of four substances after they are placed in water.Substance Ion concentrationElectrical conductivity WMediumGoodXLowPoorYHighExcellentZNoneNoneWhich compound is most likely the strongest electrolyte?

A
W
B
X
C
Y
D
Z
8

Which application of hydrates serves a function most similar to that of the use of hydrates in a fuel filter?

A
wound dressing
B
desiccant
C
fire retardant
D
toy slime
9

A solution contains 90 mL of methanol, 18 mL of propanol, and 2 mL of diethyl ether. Which is the solvent in this solution?

A
methanol
B
propanol
C
diethyl ether
D
water
10

Which is an example of a nonaqueous solution?

A
gasoline
B
fog
C
mayonnaise
D
fruit juice
11

Which is the chemical formula for iron(II) chloride tetrahydrate?

A
FeCl2•4H2O
B
FeCl3•6H2O
C
FeCl2•3H2O
D
FeCl3•4H2O
12

Consider the reaction below.Fe(s) + CuSO4(aq) Cu(s) + FeSO4(aq)Which reactant is a substance that is dissolved in solution?

Question illustration
A
Fe
B
Cu
C
CuSO4
D
FeSO4
13

Water is called the “universal solvent.” Which statement best explains this description with respect to ionic compounds?

A
Water can dissociate all ionic compounds through ion-dipole interactions.
B
Water can hydrate many ionic compounds through hydrogen-bonding interactions.
C
Water can dissociate many ionic compounds through ion-dipole interactions.
D
Water can hydrate many ionic compounds through dipole-dipole interactions.
14

Which represents a double replacement reaction and would occur?

A
NH4NO3(aq) + AgCIO3(aq) AgNO3(aq) + NH4CIO3(aq)
Option A
B
Na2CO3(aq) + CaCl2(aq) 2NaCl(aq) + CaCO3(s)
Option B
C
NaF(aq) + KCl(aq) NaCl(aq) + KCl(aq)
Option C
D
NaCl(aq) Na+(aq) + Cl-(aq)
Option D
15

A can of soda contains many ingredients, including vanilla, caffeine, sugar, and water. Which ingredient is the solvent?

c
caffeine
s
sugar
v
vanilla
w
water

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