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WorksheetsWater and Solutions Review
Total questions: 27
Worksheet time: 14mins
Which of the following is NOT TRUE about water?
The water molecule has two bonded pairs and two lone pairs of electrons
The water molecule is a bent shape.
The oxygen atom in water is more electronegative than the hydrogen.
The bond between hydrogen and oxygen where electrons are shared is called a hydrogen bond.
How does a surfactant reduce surface tension?
by increasing dipole interaction
by decreasing the distances between water molecules
by increasing dispersion forces
by interfering with hydrogen bonding
What causes water’s low vapor pressure?
covalent bonding
hydrogen bonding
ionic attractions
dispersion forces
Surface tension (a)
a. is the inward force which tends to minimize the surface area of a liquid
b. is increased by hydrogen bonding
c. may be decreased by detergents
d. all of the above
is the inward force which tends to minimize the surface area of a liquid
is increased by hydrogen bonding
may be decreased by detergents
all of the above
The condensation of steam is a(n) (a) process.
electrolytic
exothermic
catalytic
endothermic
How many water molecules are in 4 formula units of calcium chloride dihydrate (CaCl₂·2H₂O)?
2
4
6
8
Which of the substances is the most soluble in water?
CH₄
NaCl
Br₂
O₂
During the process of (a) , a (b) dissolves in a (c) .
Solvent, solvation, solute
Solute, solvent, solvation
Solvation, solute, solvent
Solute, solvation, solvent
An electric current would be conducted by ______.
a sugar solution
gasoline
a salt solution
none of the above
The silica packet found in electronics and clothing is called a _____ and absorbs water from the air because it is _______.
Salt, deliquescent
Salt, desiccant
Efflorescent, salt
Desiccant, deliquescent
Which of the following mixture types is characterized by the settling of particles?
hydrate
solution
suspension
colloid
Which of the following types of mixture exhibit the Tyndall effect?
suspensions and solutions
colloids and solutions
suspensions and colloids
An emulsifying agent is typically characterized by having _______.
one polar end and one nonpolar end
one nonpolar end and one ionic end
two polar ends
two nonpolar ends
15. Liquid substances that DO NOT mix in each other are called ____________.
immiscible
miscible
soluble
super saturated
How does the solubility of a gas in a liquid change as the temperature is increased?
Increases
decreases
remains the same
indirectly
Which of the following factors affect the solubility (not the RATE of solution) of a particular substance?
Temperature and degree of mixing
Particle size and degree of mixing
Particle size and temperature
Temperature and the nature of the solute/solvent
If solute is added to an aqueous solution and does dissolve, the original solution was _______.
an emulsion
saturated
unsaturated
supersaturated
What is the molarity of a solution that contains 2 moles of solute in 2 L of solution?
2M
3M
4M
1M
Pressurized CO₂ is pumped into three cans of soda. The first can is at 5°C, the second is at 35°C and the third is at 75°C. In which can will the most gas dissolve?
5°C
35°C
75°C
all will dissolve the same amount of gas
If the percent (mass/volume) for the solute is 4.0% and the volume of the solution is 750mL, what is the mass of the solute in the solution?
7.5g
30.g
3.0g
75g
Which of the following operations usually make a substance dissolve faster in a solvent?
Agitation
Raising the temperature
crushing the substance into a powder
all of the above
If the solubility of a particular solute is 10g/100g H2O at 20°C, which of the following solution concentrations would represent a supersaturated aqueous solution of that solute?
11g/100 g H2O at 20°C
10 g/ 100 g H2O at 25°C
5 g/100 g H2O at 25 °C
9g/100 g H2O at 20°C
What does NOT change when a solution is diluted by the addition of a solvent?
Volume of solvent
Molarity of solution
Number of moles of solute
Mass of solution
What is the percent (m/v) of a 400.0 mL of a solution that contains 60.0 g of calcium chloride, CaCl2?
1.35%
6.70%
15.0%
24.0%
Approximately how much NaNO3 can be dissolved in 100 g of H2O at 20°C?
10 g
85 g
140 g
72 g
If there is 80 g of KNO3 dissolved in 100 g water at 40°C, the solution will be ____.
saturated
unsaturated
supersaturated
The process of converting liquid water into vapor is called (a) .
Evaporation
Condensation
Sublimation
Boiling
