Chemistry Quiz Questions Flashcards
A reaction has reached equilibrium when:
(CHOOSE ONE)
none of the possible answers apply
the concentration of the reactants and products are constant
the concentration of the reactants are zero
the concentration of the products are greater than the concentration of the reactants
the concentration of the reactants and products are equal
the concentration of the reactants and products are constant
A Bronsted-Lowry acid is defined as a substance that
acts as a proton acceptor in any system
acts as a proton donor in any system
decreases the [H+] when placed in H2O
no correct answer
increases the [H+] when placed in H2O
acts as a proton donor in any system
According to Arrhenius, an acid is a substance that
reacts with the solvent to form a cation by auto-ionization
can accept a pair of electrons to form a coordinate covalent bond
is capable of donating one or more H+
causes an increase in H+ concentration in aqueous solution
no correct answer
causes an increase in H+ concentration in aqueous solution
The conjugate acid of HSO4- is
no correct answer
H+
H2SO4
SO42-
HSO4+
H2SO4
The concept of acid-base conjugate pairs is associated with which of the following?
Dalton
Bronsted-Lowry
Arrhenius
Lavoisier
none of the above
Bronsted-Lowry
Slow reactions have ________ activation energies.
high or low
High
When a ionic compound dissolves in solution to release individual positive and negative ions, we call this
ionization
saturation
dissolution
dissociation
dissociation
How do we quantify the strength of an acid?
rate constant for proton transfer
ion product constant
all are correct
acid ionization constant
acid ionization constant
Given:
The base ionization equation (LOOK AT FINAL HELP ON I PAD FOR PICTURE #1)
A strong base will have _______________ in it’s expression for Kb.
a small denominator compared to the numerator
a small numerator comparted to the denominator
a very large Kb and a small denominator compared to the numerator
an equal numerator and denominator
a large denominator comparted to the numerator
a very small numerator compared to the denominator and a large Kb
a very small value for Kb and a large denominator comparted to the numerator
a very small value for Kb
a very large Kb and a small denominator compared to the numerator
Carbonic anhydrase is an important enzyme that allows CO2 and H2O to be converted into H2CO3. In addition to allowing CO2 to be dissolved into the blood and transported to the lungs for exhalation, the products of the carbonic anhydrase reaction, H2CO3 and a related compound HCO3-, also serve to control the pH of the blood to prevent acidosis or alkalosis. The carbonic anhydrase reaction and acid-base reaction are presented below.
CO2 + H2O ⇌ H2CO3
H2CO3 ⇌ HCO3- + H+
HCO3- is the __________ of H2CO3.
conjugate acid
conjugate base
acid
base
conjugate base
For a chemical reaction to occur, particles must collide with what type of orientation?
non-specific or any
specific
specific
Most reaction rates will ________ when the temperature is lowered.
remain the same
decrease
increase
decrease
Some reactions do not occur unless outside energy is supplied.
True or False
True
Which statement describes the following reaction?
(LOOK AT FINAL HELP #2)
none are true
Zinc is being reduced and copper is the oxidizing agent
copper is being oxidized and zinc is the oxidizing reagent
Zinc is being oxidized and copper is the oxidizing agent
Zinc is being oxidized and copper is the oxidizing agent
