Gr 11 Physical Sciences: Term test 4
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Questions and Answers

What is the characteristic of acids according to the Arrhenius definition?

  • Increase the concentration of H₃O⁺ ions in solution. (correct)
  • Increase the concentration of OH⁻ ions in solution.
  • Decrease the concentration of OH⁻ ions in solution.
  • Decrease the concentration of H₃O⁺ ions in solution.

    • Which of the following is an example of a polyprotic acid?

  • Acetic acid (CH₃COOH)
  • Ammonia (NH₃)
  • Sulfuric acid (H₂SO₄) (correct)
  • Hydrochloric acid (HCl)

    • What is the term for a substance that can act as both an acid and a base?

  • Polyprotic
  • Conjugate
  • Amphoteric (correct)
  • Amphiprotic

    • According to the Bronsted-Lowry definition, what is the characteristic of a base?

    <p>Proton acceptor</p> Signup and view all the answers

    What is the term for a species that can donate or accept protons?

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

    What is formed when an acid donates a proton and a base accepts a proton?

    <p>A conjugate acid-base pair</p> Signup and view all the answers

    Which of the following is not an acid?

    <p>Sodium hydroxide (NaOH)</p> Signup and view all the answers

    What is the characteristic of an acid according to the early definition?

    <p>Sour taste</p> Signup and view all the answers

    What type of reaction occurs when an acid and a base react?

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

    What is formed when hydrochloric acid reacts with sodium hydroxide?

    <p>A salt and water</p> Signup and view all the answers

    What is the general equation for the reaction between an acid and a metal hydroxide?

    <p>nH+(aq) + M(OH)n(aq) → nH2O(l) + Mn+(aq)</p> Signup and view all the answers

    What is formed when an acid reacts with a metal carbonate?

    <p>A salt, carbon dioxide, and water</p> Signup and view all the answers

    What is the general equation for the reaction between an acid and a metal oxide?

    <p>2H+(aq) + MxOy(aq) → yH2O(l) + xMn+(aq)</p> Signup and view all the answers

    What is the product of the reaction between hydrochloric acid and ammonia?

    <p>NH4Cl</p> Signup and view all the answers

    What is the general equation for the reaction between an acid and a metal hydroxide?

    <p>nH+(aq) + M(OH)n(aq) → nH2O(l) + Mn+(aq)</p> Signup and view all the answers

    What is the product of the reaction between hydrogen bromide and potassium hydroxide?

    <p>H2O(l) + KBr(aq)</p> Signup and view all the answers

    What is the product of the reaction between an acid and a metal oxide?

    <p>H2O(l) + Mn+(aq)</p> Signup and view all the answers

    What is the product of the reaction between hydrochloric acid and ammonia?

    <p>H2O(l) + NH4Cl(aq)</p> Signup and view all the answers

    What is formed when an acid reacts with a metal carbonate?

    <p>A salt, carbon dioxide, and water</p> Signup and view all the answers

    What is the type of reaction that occurs when an acid reacts with a metal hydroxide?

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

    What is the primary characteristic of amphoteric substances?

    <p>They can act as both acids and bases, depending on the reaction.</p> Signup and view all the answers

    Which of the following is an example of a conjugate acid-base pair?

    <p>H3O+ and H2O</p> Signup and view all the answers

    What is the result of the reaction between sulfuric acid and hydroxide ions?

    <p>Both HSO4- and SO42- are formed.</p> Signup and view all the answers

    According to the Bronsted-Lowry definition, what is the characteristic of an acid?

    <p>It is a proton donor.</p> Signup and view all the answers

    What is the characteristic of a polyprotic acid?

    <p>It can donate more than one proton.</p> Signup and view all the answers

    What is the role of water in acid-base reactions?

    <p>It can act as both an acid and a base, depending on the reaction.</p> Signup and view all the answers

    Which of the following is an example of an acid?

    <p>Hydrochloric acid (HCl)</p> Signup and view all the answers

    What is the result of the reaction between an acid and a base?

    <p>The formation of a salt and water.</p> Signup and view all the answers

    What is the common product formed when an acid reacts with a metal hydroxide and a metal oxide?

    <p>Salt and water</p> Signup and view all the answers

    What is the difference between the reaction between an acid and a metal hydroxide, and the reaction between an acid and a metal oxide?

    <p>The number of hydrogen ions involved</p> Signup and view all the answers

    What is the characteristic of a neutralisation reaction?

    <p>The formation of a salt and water</p> Signup and view all the answers

    Why do acid-base reactions involve the formation of salts?

    <p>Due to the transfer of protons</p> Signup and view all the answers

    What is the common product formed when an acid reacts with a metal carbonate?

    <p>Salt and carbon dioxide</p> Signup and view all the answers

    What is the general equation for the reaction between an acid and a metal hydroxide?

    <p>nH^+(aq) + M(OH)_n(aq) → nH_2O(l) + M^n+(aq)</p> Signup and view all the answers

    What is the primary characteristic of a conjugate acid-base pair?

    <p>Two species that transform into each other by gain or loss of a proton</p> Signup and view all the answers

    Which of the following substances can act as an amphiprotic substance?

    <p>Water (H2O)</p> Signup and view all the answers

    What is the result of the reaction between sulfuric acid and hydroxide ions?

    <p>Formation of hydrogen sulfate ion (HSO4-)</p> Signup and view all the answers

    According to the Bronsted-Lowry definition, what is the characteristic of an acid?

    <p>A substance that can act as a proton donor</p> Signup and view all the answers

    Which of the following substances is an example of an amphoteric substance?

    <p>Hydrogen carbonate ion (HCO3-)</p> Signup and view all the answers

    What is the characteristic of a polyprotic acid?

    <p>A substance that can donate more than one proton</p> Signup and view all the answers

    What is the role of water in acid-base reactions?

    <p>It acts as an acid or a base depending on the reaction</p> Signup and view all the answers

    Which of the following statements is true about acid-base reactions?

    <p>An acid can react with a metal hydroxide to form a salt and water</p> Signup and view all the answers

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