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

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

<p>Amphiprotic (B)</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 (C)</p> Signup and view all the answers

Which of the following is not an acid?

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

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

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

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

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

What is formed when hydrochloric acid reacts with sodium hydroxide?

<p>A salt and water (A)</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) (B)</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 (B)</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) (D)</p> Signup and view all the answers

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

<p>NH4Cl (D)</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) (D)</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) (C)</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) (A)</p> Signup and view all the answers

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

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

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

<p>H3O+ and H2O (A)</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. (B)</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. (C)</p> Signup and view all the answers

What is the characteristic of a polyprotic acid?

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

Which of the following is an example of an acid?

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

What is the characteristic of a neutralisation reaction?

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

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

<p>Due to the transfer of protons (D)</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 (D)</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) (A)</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 (C)</p> Signup and view all the answers

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

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

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

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

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