Equilibrium + Acids and Bases

Descripción

Test sobre Equilibrium + Acids and Bases, creado por Brittany McLaren el 03/01/2016.
Brittany McLaren
Test por Brittany McLaren, actualizado hace más de 1 año
Brittany McLaren
Creado por Brittany McLaren hace más de 8 años
19
2

Resumen del Recurso

Pregunta 1

Pregunta
An acid is a hydrogen ion (proton) donor.
Respuesta
  • True
  • False

Pregunta 2

Pregunta
A base is a hydrogen ion (proton) donor.
Respuesta
  • True
  • False

Pregunta 3

Pregunta
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.
Respuesta
  • Bronsted-Lowry Theory of Acids and Bases
  • Arrhenius Theory of Acids and Bases

Pregunta 4

Pregunta
According to the Arrhenius theory, bases in aqueous solution
Respuesta
  • produce H+ (aq)
  • produce OH- (aq)
  • accept H+ (aq)
  • accept OH- (aq)

Pregunta 5

Pregunta
Which of the following is a base according to the Bronsted-Lowry theory, but not according to the Arrhenius theory?
Respuesta
  • ammonia, NH3 (aq)
  • sodium hydroxide, NaOH (aq)
  • phenol, HC6H5O (aq)
  • hydrochloric acid, HCl (aq)

Pregunta 6

Pregunta
A conjugate acid-base pair consists of two entities that
Respuesta
  • differ by one oxygen atom
  • differ by one hydrogen ion
  • neutralize each other in aqueous solution
  • produce hydroxide ions in solution

Pregunta 7

Pregunta
Which of the following is the conjugate acid of water?
Respuesta
  • H2O2 (aq)
  • OH- (aq)
  • HCHO2 (aq)
  • H3O+ (aq)

Pregunta 8

Pregunta
Which of the following is a property of a strong acid?
Respuesta
  • 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.

Pregunta 9

Pregunta
Able to donate or accept a hydrogen ion (proton) and thus act as both a Bronsted-Lowry acid and a Bronsted-Lowry base
Respuesta
  • amphiprotic
  • indicators
  • polyprotic
  • electrolytes

Pregunta 10

Pregunta
Which of the following best describes the components of a buffer solution?
Respuesta
  • 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

Pregunta 11

Pregunta
Which of the following statements correctly describes the process of titration?
Respuesta
  • 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.

Pregunta 12

Pregunta
Which of the following may affect the value of K for an equilibrium reaction?
Respuesta
  • reaction temperature
  • whether the reaction is endothermic or exothermic
  • initial concentration of reactants
  • all of the above

Pregunta 13

Pregunta
The value of the equilibrium constant for a reaction allows us to predict
Respuesta
  • 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

Pregunta 14

Pregunta
To which of the follwing types of reaction do we apply Le Chatelier's principle?
Respuesta
  • reversible reactions
  • all reactions at equilibrium
  • precipitation reactions
  • all chemical reactions

Pregunta 15

Pregunta
Adding energy to an exothermic reaction at equilibrium
Respuesta
  • 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

Pregunta 16

Pregunta
Which of the following quantities is calculated to predict in which direction an equilibrium will shift?
Respuesta
  • K forward
  • K reverse
  • Q
  • K

Pregunta 17

Pregunta
Which of the following is a base?
Respuesta
  • NaOH (aq)
  • NH3 (aq)
  • sodium hypochlorite, NaClO
  • all of the above

Pregunta 18

Pregunta
Which of the following statements is true for acids?
Respuesta
  • they taste bitter
  • they feel slippery
  • they turn blue litmus pink
  • all of the above

Pregunta 19

Pregunta
Which of the following terms describes substances that are capable of behaving as either an acid or a base?
Respuesta
  • diprotic
  • electrolytic
  • amphiprotic
  • conjugate

Pregunta 20

Pregunta
Which of the following compounds is an example of an oxyacid?
Respuesta
  • HF (aq)
  • HCl (aq)
  • HClO3 (aq)
  • HCN (aq)

Pregunta 21

Pregunta
Oxyacid - an acid in which the acidic hydrogen atom is attached to an oxygen atom
Respuesta
  • True
  • False

Pregunta 22

Pregunta
Which of the following statements correctly describes strong bases?
Respuesta
  • 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.

Pregunta 23

Pregunta
Which of the following substances would make the best electrolyte?
Respuesta
  • a strong acid
  • a weak acid
  • a weak base
  • an organic acid
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