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Equilibrium + Acids and Bases

Description

Quiz on Equilibrium + Acids and Bases, created by Brittany McLaren on 03/01/2016.
Brittany McLaren
Quiz by Brittany McLaren, updated more than 1 year ago
Brittany McLaren
Created by Brittany McLaren over 8 years ago
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Resource summary

Question 1

Question
An acid is a hydrogen ion (proton) donor.
Answer
  • True
  • False

Question 2

Question
A base is a hydrogen ion (proton) donor.
Answer
  • True
  • False

Question 3

Question
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.
Answer
  • Bronsted-Lowry Theory of Acids and Bases
  • Arrhenius Theory of Acids and Bases

Question 4

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

Question 5

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

Question 6

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

Question 7

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

Question 8

Question
Which of the following is a property of a strong acid?
Answer
  • 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.

Question 9

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

Question 10

Question
Which of the following best describes the components of a buffer solution?
Answer
  • 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

Question 11

Question
Which of the following statements correctly describes the process of titration?
Answer
  • 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.

Question 12

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

Question 13

Question
The value of the equilibrium constant for a reaction allows us to predict
Answer
  • 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

Question 14

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

Question 15

Question
Adding energy to an exothermic reaction at equilibrium
Answer
  • 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

Question 16

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

Question 17

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

Question 18

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

Question 19

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

Question 20

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

Question 21

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

Question 22

Question
Which of the following statements correctly describes strong bases?
Answer
  • 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.

Question 23

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