Chem 1212 Midterm Questions With Complete Solutions
Which of the following best describes the term dissociation?
Dissociation is a physical process accompanying the dissolution
of an ionic compound in which the compound's constituent ions
are solvated and dispersed throughout the solution.
Which of the following occurs when an ionic compound
dissolves in a polar solvent such as water?
- The water molecules chemically react with the ions.
- The disorder of the ionic salt is decreased.
- The water molecules attract both the anions and cations in the
ionic salt.
- The ions become solvated by water molecules, which reduces
the electrostatic attractions between the ions.
The water molecules attract both the anions and cations in the
ionic salt, The ions become solvated by water molecules, which
reduces the electrostatic attractions between the ions.
One of the following compounds is immiscible with water.
Identify the compound.
carbon tetrachloride, formula CCl4
Miscible is described by which of the following?
Miscible describes two liquids that are completely mutually
soluble.
,Which of the following might increase the solubility of a solid
solute in a liquid solvent?
increase the temperature
A gas will deviate from Henry's law if it:
undergoes a chemical reaction with the solvent
At the exact instant that a carbonated beverage is opened, it is
__________.
supersaturated with carbon dioxide
Which of the following can dissolve the most oxygen?
water at 8∘C
A certain liquid sample contains a small amount of dissolved
chloroform. Which of the following would be the most effective
way to rid the liquid of chloroform?
,Heating the sample gently, and providing an outlet for the gas to
flow into a storage container
Of the following, which decreases the solubility of a gas in a
liquid?
Increased temperature
When a carbonated beverage is sealed, it is:
saturated with carbon dioxide
Henry's law states that the solubility of a gas and its partial
pressure are:
directly proportional
Which of the following equations is a mathematical
representation of Henry's Law?
Cg=kPg
Henry's law applies exclusively to:
gases
Gases can form supersaturated solutions if prepared at:
low temperatures
, When a solution with a nonvolatile solute is prepared, which of
the following will DEFINITELY decrease relative to the pure
solvent? Select all that apply.
- Freezing point of solution
- Vapor pressure of solution
- Boiling point of solution
- All of the above
Freezing point of solution, Vapor pressure of solution
Which of the following gives the definition of colligative
property?
A colligative property is a property of a solution that depends
only on the concentration of a solute species.
Colligative properties are exhibited by:
solutions
Alison makes some sugar water: an aqueous solution of sucrose.
Which properties of the solution will NOT change if Alison
adds more sucrose to the solution?
- acidity
- vapor pressure
- boiling point
- freezing point
Which of the following best describes the term dissociation?
Dissociation is a physical process accompanying the dissolution
of an ionic compound in which the compound's constituent ions
are solvated and dispersed throughout the solution.
Which of the following occurs when an ionic compound
dissolves in a polar solvent such as water?
- The water molecules chemically react with the ions.
- The disorder of the ionic salt is decreased.
- The water molecules attract both the anions and cations in the
ionic salt.
- The ions become solvated by water molecules, which reduces
the electrostatic attractions between the ions.
The water molecules attract both the anions and cations in the
ionic salt, The ions become solvated by water molecules, which
reduces the electrostatic attractions between the ions.
One of the following compounds is immiscible with water.
Identify the compound.
carbon tetrachloride, formula CCl4
Miscible is described by which of the following?
Miscible describes two liquids that are completely mutually
soluble.
,Which of the following might increase the solubility of a solid
solute in a liquid solvent?
increase the temperature
A gas will deviate from Henry's law if it:
undergoes a chemical reaction with the solvent
At the exact instant that a carbonated beverage is opened, it is
__________.
supersaturated with carbon dioxide
Which of the following can dissolve the most oxygen?
water at 8∘C
A certain liquid sample contains a small amount of dissolved
chloroform. Which of the following would be the most effective
way to rid the liquid of chloroform?
,Heating the sample gently, and providing an outlet for the gas to
flow into a storage container
Of the following, which decreases the solubility of a gas in a
liquid?
Increased temperature
When a carbonated beverage is sealed, it is:
saturated with carbon dioxide
Henry's law states that the solubility of a gas and its partial
pressure are:
directly proportional
Which of the following equations is a mathematical
representation of Henry's Law?
Cg=kPg
Henry's law applies exclusively to:
gases
Gases can form supersaturated solutions if prepared at:
low temperatures
, When a solution with a nonvolatile solute is prepared, which of
the following will DEFINITELY decrease relative to the pure
solvent? Select all that apply.
- Freezing point of solution
- Vapor pressure of solution
- Boiling point of solution
- All of the above
Freezing point of solution, Vapor pressure of solution
Which of the following gives the definition of colligative
property?
A colligative property is a property of a solution that depends
only on the concentration of a solute species.
Colligative properties are exhibited by:
solutions
Alison makes some sugar water: an aqueous solution of sucrose.
Which properties of the solution will NOT change if Alison
adds more sucrose to the solution?
- acidity
- vapor pressure
- boiling point
- freezing point
