4267319
Descrição
Quiz por Brittany McLaren, atualizado more than 1 year ago
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Criado por Brittany McLaren
quase 9 anos atrás
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Questão 1
Questão
An acid is a hydrogen ion (proton) donor.
Responda
- True
- False
Questão 2
Questão
A base is a hydrogen ion (proton) donor.
Responda
- True
- False
Questão 3
Questão
A theory stating that, in an aqueous solution, an acid is a substance that produces hydrogen ions and a base is a substance that produces hydroxide ions.
Responda
-
Bronsted-Lowry Theory of Acids and Bases
-
Arrhenius Theory of Acids and Bases
Questão 4
Questão
According to the Arrhenius theory, bases in aqueous solution
Responda
-
produce H+ (aq)
-
produce OH- (aq)
-
accept H+ (aq)
-
accept OH- (aq)
Questão 5
Questão
Which of the following is a base according to the Bronsted-Lowry theory, but not according to the Arrhenius theory?
Responda
-
ammonia, NH3 (aq)
-
sodium hydroxide, NaOH (aq)
-
phenol, HC6H5O (aq)
-
hydrochloric acid, HCl (aq)
Questão 6
Questão
A conjugate acid-base pair consists of two entities that
Responda
-
differ by one oxygen atom
-
differ by one hydrogen ion
-
neutralize each other in aqueous solution
-
produce hydroxide ions in solution
Questão 7
Questão
Which of the following is the conjugate acid of water?
Responda
-
H2O2 (aq)
-
OH- (aq)
-
HCHO2 (aq)
-
H3O+ (aq)
Questão 8
Questão
Which of the following is a property of a strong acid?
Responda
-
Ka is small.
-
It exists primarily in the form of molecules in solution.
-
It ionizes completely in aqueous solution.
-
Its ionization equilibrium lies far to the left.
Questão 9
Questão
Able to donate or accept a hydrogen ion (proton) and thus act as both a Bronsted-Lowry acid and a Bronsted-Lowry base
Responda
-
amphiprotic
-
indicators
-
polyprotic
-
electrolytes
Questão 10
Questão
Which of the following best describes the components of a buffer solution?
Responda
-
a weak acid an a strong base in water
-
a weak acid and its conjugate base in water
-
a strong acid and a weak base in water
-
a neutral salt in water
Questão 11
Questão
Which of the following statements correctly describes the process of titration?
Responda
-
The titrant is added slowly from a burette into the sample until the equivalence point is observed.
-
The sample is added slowly from a burette into the titrant until the equivalence point is observed.
-
The sample is added slowly from a burette into the titrant until the endpoint is observed.
-
The titrant is added slowly from a burette into the sample until the endpoint is observed.
Questão 12
Questão
Which of the following may affect the value of K for an equilibrium reaction?
Responda
-
reaction temperature
-
whether the reaction is endothermic or exothermic
-
initial concentration of reactants
-
all of the above
Questão 13
Questão
The value of the equilibrium constant for a reaction allows us to predict
Responda
-
the speed of the reaction
-
the tendency for the reaction to produce products
-
the temperature at which the reaction will take place
-
the concentrations of the reactants and products
Questão 14
Questão
To which of the follwing types of reaction do we apply Le Chatelier's principle?
Responda
-
reversible reactions
-
all reactions at equilibrium
-
precipitation reactions
-
all chemical reactions
Questão 15
Questão
Adding energy to an exothermic reaction at equilibrium
Responda
-
causes a decrease in the concentration of the reactants
-
causes a decrease in the concentration of the products
-
does not affect the system
-
causes an increase in the concentration of the products
Questão 16
Questão
Which of the following quantities is calculated to predict in which direction an equilibrium will shift?
Responda
-
K forward
-
K reverse
-
Q
-
K
Questão 17
Questão
Which of the following is a base?
Responda
-
NaOH (aq)
-
NH3 (aq)
-
sodium hypochlorite, NaClO
-
all of the above
Questão 18
Questão
Which of the following statements is true for acids?
Responda
-
they taste bitter
-
they feel slippery
-
they turn blue litmus pink
-
all of the above
Questão 19
Questão
Which of the following terms describes substances that are capable of behaving as either an acid or a base?
Responda
-
diprotic
-
electrolytic
-
amphiprotic
-
conjugate
Questão 20
Questão
Which of the following compounds is an example of an oxyacid?
Responda
-
HF (aq)
-
HCl (aq)
-
HClO3 (aq)
-
HCN (aq)
Questão 21
Questão
Oxyacid - an acid in which the acidic hydrogen atom is attached to an oxygen atom
Responda
- True
- False
Questão 22
Questão
Which of the following statements correctly describes strong bases?
Responda
-
They completely dissociate in water to produce hydrogen ions.
-
They completely dissociate in water to produce hydroxide ions.
-
They only partially dissociate in water to produce hydroxide ions.
-
They only partially dissociate in water to produce hydrogen ions.
Questão 23
Questão
Which of the following substances would make the best electrolyte?
Responda
-
a strong acid
-
a weak acid
-
a weak base
-
an organic acid
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