Chemistry Redox Reactions and Stoichiometry

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Questions and Answers

What is the oxidation state of S in SO2?

  • +4 (correct)
  • -2
  • +6
  • +2

What type of reaction involves the transfer of electrons?

  • Decomposition reaction
  • Synthesis reaction
  • Redox reaction (correct)
  • Single replacement reaction

What is the formula to calculate the percentage yield of a reaction?

  • (Theoretical/Actual)(100)
  • (Actual - Theoretical)(100)
  • (Actual/Theoretical)(100) (correct)
  • (Theoretical - Actual)(100)

What is the unit of molarity?

<p>moles per liter (B)</p> Signup and view all the answers

What is the formula to calculate the percentage concentration of a solution?

<p>(g solute/100mL solution)(100) (B)</p> Signup and view all the answers

What is the net ionic equation for a reaction involving a strong acid and a strong base?

<p>H+(aq) + OH-(aq) → H2O(l) + Salt(aq) (A)</p> Signup and view all the answers

Why does a weak acid/weak electrolyte remain intact in an acid-base reaction?

<p>It cannot fully dissociate compared to a strong acid (C)</p> Signup and view all the answers

How is the molarity of a solution related to the volume of the solution?

<p>M1V1 = M2V2 (C)</p> Signup and view all the answers

What is the oxidation number of hydrogen in most compounds?

<p>+1 (B)</p> Signup and view all the answers

What is the oxidation number of oxygen in peroxides?

<p>-1 (C)</p> Signup and view all the answers

What is the rule for the sum of oxidation numbers in a species?

<p>The sum of oxidation numbers must be equal to the total charge on the species (C)</p> Signup and view all the answers

What is the general formula for an acid-base reaction?

<p>AB + CD → AD + CB (D)</p> Signup and view all the answers

What is the condition for the best buffer systems?

<p>[HA] = [A-] (C)</p> Signup and view all the answers

What is the purpose of the Henderson-Hasselbalch equation?

<p>To determine the pH of a buffer solution (A)</p> Signup and view all the answers

What is the result when the product of [Ag+][Cl-] is greater than the Ksp in an aqueous solution?

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

What is the solubility of a substance?

<p>The mass of substance that dissolves to form a saturated solution (C)</p> Signup and view all the answers

What is the significance of the solubility product constant (Ksp)?

<p>It determines the solubility of an ionic compound (D)</p> Signup and view all the answers

What is the condition for equilibrium in a heterogeneous solution?

<p>The product of the ion concentrations is equal to the Ksp (B)</p> Signup and view all the answers

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