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CHM 101- EXAM #3
Test Questions
50
Chemistry
Undergraduate 2
12/04/2014

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Term
homogeneous
Definition
An equilibrium in which all the components are gases is a _________ equilibrium.
Term
increase the number of successful reactant collisions
Definition
In a catalyzed chemical reaction, one function of a catalyst is to
Term
an acid
Definition
According to the Arrhenius concept, if HNO3 were dissolved in water, it would act as
Term
neutralization
Definition
An acid and base react to form a salt and water in a(n) ___________ reaction.
Term
weak electrolyte
Definition
In water, a substance that partially ionizes in a solution is called a
Term
HCl
Definition
Which of the following is the strongest acid?
Term
reversible
Definition
A reaction that can proceed in either the forward or the reverse direction as written is called a ___________ reaction.
Term
H20
Definition
Identify the Bronted-Lowry acid in the following reaction

H20 + CO3^2- -> HCO3- + OH-
Term
decreasing the rate of reactions affecting the food
Definition
Refrigerating perishable foods affects biochemical reactions by
Term
solvent; lower solvent
Definition
In the process known as osmosis, __________ moves through a semipermeable membrane into an area of _____________ concntration.
Term
has a slippery, soapy feel
Definition
Which one of the following is characteristic of a base?
Term
increases the solubility of a solid solute in the solution
Definition
An increase in temperature of a solution usually
Term
the rate of the forward reaction equals the rate of the reverse reaction
Definition
A chemical reaction has reached equilibrium when
Term
hydrogen
Definition
When a piece of magnesium metal is added to hydrochloric acid, what gas is produced?
Term
dialysis
Definition
The process by which a semipermeable membrane allows water molecules, small molecules, and ions to pass through while retaining large particles is called _________.
Term
In bases, [OH-] is greater than [H3O+]
Definition
Which of the following statements correctly describes the hydronium-hydroxide balance in the given solution?
Term
increasing the concentrations of the reactants
Definition
In any chemical reaction, the rate of the reaction can be increased by
Term
the amount of product formed in a unit of time.
Definition
The rate of any chemical reaction can be determined by observing
Term
product
Definition
In an exothermic reaction, heat can be considered a ________.
Term
increases as the gas pressure above the liquid increases
Definition
According to Henry's Law, the solubility of a gas in a liquid
Term
the amount of solute does not change
Definition
During the process of diluting a solution to a lower concentration,
Term
can be a solid liquid, or gas
Definition
In a solution, the solvent
Term
solvent
Definition
A solution prepared by dissolving 2g of KCL in 100g of H2O. In this solution, H2O is the
Term
saturated
Definition
When some of the sugar added to iced tea remains undissolved at the bottom of the glass, the solution is
Term
a base is a proton acceptor
Definition
According to the Bronsted-Lowry definition
Term
a colloid
Definition
A homogeneous mixture that does not settle out upon standing is
Term
a substance that speeds up a reaction without being consumed in the reaction
Definition
A catalyst is
Term
weaker
Definition
The stronger the acid, the ________ the conjugate base.
Term
strong electrolyte
Definition
In water, a substance that ionizes completely in the solution is called a
Term
the amount of ion that carries 1 mole of electrical charge
Definition
An equivalent is
Term
a base
Definition
According to the Arrhenius concept, if NaOH were dissolved in water, it would act as
Term
True
Definition
T/F: The rate of a chemical reaction depends on temperature
Term
Definition
An equilibrium constant with a value greater than 1 means the reaction favors the
Term
F
Definition
An equilibrium constant Kc= 1 x 10^-3 for a reaction indicates that the reaction favors product formation.
Term
solution
Definition
A mixture in which one component settles is called a(n) ___________.
Term
NCl/Cl

NH3/NH4
Definition
Identify the conjugate acid-base pairs in the following reaction.

HCl + NH3 -> NH4+ + Cl-
Term
True
Definition
T/F: A catalyst lowers the activation energy of a chemical reaction.
Term
molarity
Definition
The number of moles of a compound dissolved in one liter of a solution is called the
Term
False
Definition
The rate of a chemical reaction is not affected by the concentration of reactants.
Term
electrolyte
Definition
A substance that carries an electric current when dissolved in water is called a(n) ___________.
Term
[H3O+][H3O2-]
/
[HC2H3O2]
Definition
Write the proper Ka expression for the ionization of acetic acid, HC2H3O2.
Term
suspension
Definition
A glass of river water will separate out into two layers after sitting for a length of time. This is an example of a(n) ____________.
Term
Definition
The gas responsible for acid rain is ________.
Term
Definition
Normal blood has a pH of _______.
Term
Definition
Lung disease blocking gas diffusion like emphysema, asthma, bronchitis, or pneumonia cause levels of _________ to increase and the pH to ________. An infusion of _________ will help stabilize the patient. This condition is known as __________.
Term
Definition
Hyperventilation can cause the levels of _____ to _____ and thus a _____ in pH. This can be stabilized in a patient by having them __________. This is known as ________.
Term
Definition
Whose principle helps predict the shift in chemical equilibrium?
Term
Definition
What effect can be used to distinguish solution from colloid or suspension?
Term
;decreased; titration
Definition
A measured volume of _________ molarity of acid is added to a flask with a few dros of indicator. A buret is filled with a _________ molarity of base. The base is slowly dripped into the acid until the indicator changes color. The volume of the base is measured and from this data the molarity of the acid is determined. This process is known as acid-base __________.
Term
Definition
In patients with emphysema, asthma, and bronchitis can likely have __________ levels of CO2. This can cause the pH to __________. The treatment is an infusion of ____________. This condition is known as _____________.
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