Acid-Base Strength Quiz
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Questions and Answers

Which of these anions is considered the weakest base based on acid strength?

  • F-
  • SO42-
  • I- (correct)
  • CN-

    • Among HI, HSO4-, HF, and HCN, which compound has the weakest acidic strength?

  • HSO4-
  • HF
  • HCN (correct)
  • HI

    • What is the relationship between acid strength and base strength in conjugate pairs?

  • Independent
  • Directly proportional
  • Inversely proportional (correct)
  • Only related in strong acids

    • Which of the following anions corresponds to the strongest base?

    <p>CN-</p> Signup and view all the answers

    What is the pH nature of a solution prepared by adding 0.10 mol of iron(III) nitrate to 1.00 L of water?

    <p>The solution is acidic.</p> Signup and view all the answers

    If HI is the strongest acid, what can be said about the strength of its conjugate base?

    <p>It is weak</p> Signup and view all the answers

    Which of the following statements is true regarding the calculation of the acidity of the iron(III) nitrate solution?

    <p>The $K_a$ for the species in solution is necessary for prediction.</p> Signup and view all the answers

    Which of the following anions is the weakest base according to the given acid strength series?

    <p>HCN</p> Signup and view all the answers

    Among the following, which acid is the strongest?

    <p>HI</p> Signup and view all the answers

    In the context of the acid strength series provided, which comparison is correct?

    <p>HF is stronger than HCN.</p> Signup and view all the answers

    What is the pH of a 1.25 M solution of the weak acid HA that is 9.2% dissociated?

    <p>2.16</p> Signup and view all the answers

    What is the dissociation percentage of a 1.25 M solution of the weak acid HA when it is known to be 9.2% dissociated?

    <p>9.2%</p> Signup and view all the answers

    How many moles of iron ions are produced when 0.10 mol of iron(III) nitrate dissolves in water?

    <p>0.10 mol</p> Signup and view all the answers

    What concentration of nitrate ions is present in the solution after dissolving 0.10 mol of iron(III) nitrate in 1.00 L of water?

    <p>0.30 M</p> Signup and view all the answers

    What would be the effect on pH if the dissociation percentage of the weak acid HA increased significantly?

    <p>pH would decrease</p> Signup and view all the answers

    What remains of a strong base after it has reacted?

    <p>A weak conjugate acid</p> Signup and view all the answers

    Which of the following products is formed when tert-butyl alcohol decomposes at 450°C?

    <p>Water and isobutene</p> Signup and view all the answers

    Which statement is true regarding the decomposition of tert-butyl alcohol?

    <p>It generates water as one of the products</p> Signup and view all the answers

    Which product indicates the conversion of tert-butyl alcohol into an alkene?

    <p>Isobutene</p> Signup and view all the answers

    If a strong acid were formed from a strong base reaction, what would that imply?

    <p>The base formed a strong conjugate acid</p> Signup and view all the answers

    What will occur when the volume of the reaction vessel containing tert-butyl alcohol, water, and isobutene is reduced by 50% at constant temperature?

    <p>The forward reaction will proceed in order to reestablish equilibrium.</p> Signup and view all the answers

    In the decomposition of tert-butyl alcohol, which of the following is a product?

    <p>Water</p> Signup and view all the answers

    Which statement accurately describes the equilibrium established by the reaction of tert-butyl alcohol?

    <p>There will be a dynamic balance between reactants and products.</p> Signup and view all the answers

    At 450°C, what is the significance of the equilibrium constant in the decomposition of tert-butyl alcohol?

    <p>It reflects the ratio of products to reactants at equilibrium.</p> Signup and view all the answers

    What type of reaction is occurring when tert-butyl alcohol decomposes into water and isobutene?

    <p>Decomposition reaction</p> Signup and view all the answers

    What is the pH of a 0.183 M aqueous solution of hypobromous acid (HOBr)?

    <p>4.576</p> Signup and view all the answers

    Which value is closest to the $K_a$ of hypobromous acid?

    <p>$2.06 imes 10^{-9}$</p> Signup and view all the answers

    What is the characteristic of hypobromous acid as described by its $K_a$ value?

    <p>It is a weak acid.</p> Signup and view all the answers

    What is the concentration of $H^+$ ions in the 0.183 M solution of hypobromous acid if $K_a = 2.06 imes 10^{-9}$?

    <p>1.60 imes 10^{-5} M</p> Signup and view all the answers

    Which of the following statements is true regarding hypobromous acid?

    <p>It acts as a weak Bronsted-Lowry acid.</p> Signup and view all the answers

    Which change will lead to an increase in the concentration of $N_2$ at equilibrium?

    <p>Removing some $NO$ from the mixture</p> Signup and view all the answers

    How does an increase in system pressure affect the equilibrium of the reaction?

    <p>It will shift equilibrium to the right</p> Signup and view all the answers

    What effect will adding more $NO$ have on the equilibrium of the reaction?

    <p>It will decrease $NOI$ concentration</p> Signup and view all the answers

    Which of the following actions will decrease the concentration of $N_2$ at equilibrium?

    <p>Removing some $I_2$ from the system</p> Signup and view all the answers

    What is the expected outcome if the temperature of the reaction is decreased?

    <p>The equilibrium will shift to produce more $NOI$</p> Signup and view all the answers

    What is the $K_a$ for butyric acid if a 0.25 M solution has a pH of 2.71?

    <p>$7.8 imes 10^{-3}$</p> Signup and view all the answers

    Which of the following is true about butyric acid?

    <p>It is responsible for rancid butter odor.</p> Signup and view all the answers

    What is the pH of a 0.183 M solution of hypobromous acid (HOBr) with a $K_a$ of $2.06 imes 10^{-9}$?

    <p>6.04</p> Signup and view all the answers

    What does a low $K_a$ value indicate about an acid?

    <p>It is a weak acid.</p> Signup and view all the answers

    Which conclusion can be drawn from a pH of 2.71 for a butyric acid solution?

    <p>The solution is strongly acidic.</p> Signup and view all the answers

    Which change will cause the equilibrium to shift to the left?

    <p>Add more NOBr</p> Signup and view all the answers

    What will most likely happen if the temperature of the reaction is decreased?

    <p>Shift to the left</p> Signup and view all the answers

    If some Br₂ is removed from the system, what effect will this have on the equilibrium?

    <p>Shift to the left</p> Signup and view all the answers

    How will increasing the container's volume affect the reaction at equilibrium?

    <p>Shift to the left</p> Signup and view all the answers

    Which statement is true regarding the reaction's enthalpy?

    <p>It requires heat input to proceed</p> Signup and view all the answers

    What is the pH of a 0.183 M aqueous solution of hypobromous acid (HOBr) given that $K_a = 2.06 \times 10^{-9}$?

    <p>4.576</p> Signup and view all the answers

    Which value represents the strongest acidic condition among the following options?

    <p>0.738</p> Signup and view all the answers

    If the $K_a$ of hypobromous acid (HOBr) is $2.06 \times 10^{-9}$, what does this indicate about the strength of the acid?

    <p>It is a weak acid.</p> Signup and view all the answers

    What is the significance of the value $K_a = 2.06 \times 10^{-9}$ in the context of acid dissociation?

    <p>It quantifies the extent of dissociation.</p> Signup and view all the answers

    What conclusion can be drawn regarding the pH of a strong acid solution compared to a weak acid solution with the same concentration?

    <p>The strong acid will have a lower pH.</p> Signup and view all the answers

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