Objectives & Procedures: Acid-Base Chemistry

11.1 – Acid-Base Titration Curves

Learning Objectives

  • Understand the titration curves for the following solutions
  • [3] – A weak acid: acetic acid, CH COOH.
  • A strong acid: hydrochloric acid, HCl.
  • An acidic commercial cleanser.
  • A basic commercial cleanser.
  • Use the titration curves to calculate the percent of the active ingredients in the commercial cleansers.
  • Determine the Ka of a weak acid.

11.2 – Analysis of Soda Ash

Learning Objectives

  • Understand the titration curve for a diprotic base.
  • [2 3] – Use the titration curve to calculate the percent of Na CO in an unknown sample of soda ash.

11.3 – Analysis of Solid Mixture

Learning Objectives

  • Learn to analyze a solid unknown with volumetric techniques.
  • Standardize a solution of NaOH.
  • Determine the percentage of KHP in solid mixture of KHP and a soluble salt.

11.4 – Characterization of Weak Acids

Learning Objectives

  • Understand the titration curve for a weak acid.
  • Calculate the molar mass of the weak acid.
  • Calculate the Ka value for the weak acid.
  • Use the molar mass and Ka values to identify the acid.

11.5 – Introduction to indicators & Acid-Base Titration

Learning Objectives

  • An introduction to pH as a means of determining the amount of an acid or base present.
  • Exploration of the change in acidity versus the volume of titrant added during a titration.
  • Determine the difference between a strong acid and a weak acid titration curve.
  • Determine the effect of a weak acid/strong base titration on the acidity of the equivalence point.

11.6 – Introduction to Acids, Bases and Titration

Learning Objectives

  • Introduce the nature of acids and bases.
  • Introduce acid-base indicators, e.g., litmus, wide range indicator papers and specific titration indicators.
  • Introduce various acid/base reactions
  • Introduce titration as a means of determining the amount of an acid or base present.

11.7 – Ka1 of Phosphoric Acid by Titration

Learning Objectives

  • Experience the titration of a triprotic acid.
  • Learn proper technique in pipette and buret usage.
  • Determine the first dissociation constant for phosphoric acid from the titration curve.
  • Become familiar with Pauling’s rules for oxyacid strength.

11.8 – Determining Ka2 of Sulfuric Acid by Titration

Learning Objectives

  • Experience the titration of a diprotic acid.
  • Learn proper technique in pipette and buret usage.
  • Determine the second dissociation constant for sulfuric acid from the titration curve.
  • Become familiar with Pauling’s rules for oxyacid strength.

11.9 – Titration of a Cola Product

Learning Objectives

  • The objective of this laboratory experiment is to determine the molar concentration of phosphoric acid in a cola product.

11.10 – Titration of an acid Mixture

Learning Objectives

  • Analyze an acid mixture by titration with NaOH solution.
  • Use the MicroLAB interface to gather and store titration data.
  • Use the MicroLAB spreadsheet to graph the titration curve and accurately determine the endpoints.

11.11 – Titration Curves & the Dissociation Constant of Acetic Acid

Learning Objectives

  • Prepare theoretical titration curves for the titration of HCl with NaOH.
  • [2 3 2 2 3 2]  – The titration of HC H O with NaOH. (HC H O is often abbreviated as HOAc)
  • [2 3 2] – Perform the experimental titration of HC H O with NaOH using the MicroLAB Interface.
  • Analyze the titration data using the MicroLAB spreadsheet

8.4 – The Formaldehyde Clock Reaction

Learning Objectives

  • Determine the rate law for the reaction between formaldehyde and bisulfite ion.
  • Determine the activation energy for the above reaction.
  • Understand the nature of a “pseudo” kinetic reaction.