33 6.5 Acid-Base Titrations

Practice questions

1. Which of the following statements is incorrect regarding titration?
   1. 1. The titrant is usually added to the analyte, which is a substance with an unknown concentration.
      2. Usually, the analyte (substance with an unknown concentration) is added to the titrant.
      3. Titration is a chemical reaction performed in a quantitative fashion.
      4. The reagent with the known concentration is typically the titrant.
2. Is this statement true? An acid is always the titrant.
3. If [latex]{55.60mL}[/latex] of [latex]{0.2221M}[/latex][latex]\ce{HCl}[/latex] was needed to titrate a sample of [latex]\ce{NaOH}[/latex] to its equivalence point, what mass of [latex]\ce{NaOH}[/latex] was present?
   1. 1. [latex]{0.494g}[/latex]
      2. [latex]{8.76g}[/latex]
      3. [latex]{3.87g}[/latex]
      4. [latex]{56.34g}[/latex]
4. It takes [latex]{45.66mL}[/latex] of [latex]{0.1126M}[/latex] [latex]\ce{HBr}[/latex] to titrate [latex]{25.00mL}[/latex] of [latex]\ce{Ca{(OH)}_{2}}[/latex] to its equivalence point. What is the original concentration of the [latex]\ce{Ca{(OH)}_{2}}[/latex] solution?
   1. 1. [latex]{2.897M}[/latex]
      2. [latex]{45.981M}[/latex]
      3. [latex]{10.378M}[/latex]
      4. [latex]{0.103M}[/latex]

Answers

1. b
2. False
3. a
4. d