Unit Test 7: Aqueous Solutions

Quiz
•
Chemistry
•
12th Grade
•
Easy
Standards-aligned
Jacqueline Bakalov
Used 1+ times
FREE Resource
25 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which property of an unsaturated solution of sodium chloride in water remains the same when more water is added to the solution?
density of the solution
boiling point of the solution
mass of sodium chloride in the solution
percent by mass of water in the solution
Answer explanation
The mass of sodium chloride in the solution remains constant regardless of the amount of water added. Adding water dilutes the solution but does not change the amount of solute present.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Under which conditions of temperature and pressure is a gas most soluble in water?
high temperature and low pressure
high temperature and high pressure
low temperature and low pressure
low temperature and high pressure
Answer explanation
A gas is most soluble in water at low temperatures and high pressures because lower temperatures reduce kinetic energy, allowing more gas to dissolve, while higher pressures increase the gas's solubility by forcing more gas into the liquid.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A change in pressure would have the greatest effect on the solubility of a
solid in a liquid
liquid in a liquid
gas in a liquid
liquid in a solid
Answer explanation
A change in pressure significantly affects the solubility of gases in liquids due to the gas law, which states that increasing pressure increases gas solubility. Solubility of solids and liquids is less affected by pressure.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Compared to distilled water, an aqueous salt solution has
better electrical conductivity
poorer electrical conductivity
a lower boiling point at standard pressure
a higher freezing point at standard pressure
Answer explanation
An aqueous salt solution contains ions that enhance its ability to conduct electricity, making it a better conductor than distilled water, which lacks these ions.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which phrase describes the molarity of a solution?
liters of solute per mole of solution
liters of solution per mole of solution
moles of solute per liter of solution
moles of solution per liter of solution
Answer explanation
Molarity is defined as the number of moles of solute per liter of solution. Therefore, the correct phrase is 'moles of solute per liter of solution', which accurately describes how molarity is calculated.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The concentration of a solution can be expressed in
milliliters per minute
parts per million
grams per kelvin
joules per gram
Answer explanation
The concentration of a solution is commonly expressed in parts per million (ppm), which indicates the amount of solute in a million parts of solution. Other options like milliliters per minute or joules per gram do not represent concentration.
Tags
NGSS.HS-PS1-5
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Two substances in a mixture differ in density and particle size. These properties can be used to
separate the substances
chemically combine the substances
determine the freezing point of the mixture
predict the electrical conductivity of the mixture
Answer explanation
The differing density and particle size of the substances allow for physical separation methods, such as filtration or sedimentation, making 'separate the substances' the correct choice.
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