By: Brother Carmen Ciardullo, Retired, St. Joseph’s Prep Seminary, Princeton, NJ
The Introduction to Acid–Base Titrations Chemistry Student Laboratory Kit allows for many titrations to be performed in one lab period. Students find the percentage of acetic acid in vinegar by performing titration with a sodium hydroxide solution.
Several titrations can be performed during one class period with surprisingly good results. Students determine the percentage of acetic acid in household vinegar by titrating the vinegar with a sodium hydroxide solution of known concentration. The indicator phenolphthalein will produce a pink endpoint. Instructions include step-by-step explanations of the calculations. All chemicals and specialized equipment are included.
Complete for 30 students working in pairs. Fifteen reusable 24-well plates are recommended and available separately.
Correlation to Next Generation Science Standards (NGSS)
Science & Engineering Practices
Analyzing and interpreting data
Disciplinary Core Ideas
MS-PS1.B: Chemical Reactions HS-PS1.A: Structure and Properties of Matter
Crosscutting Concepts
Patterns
Performance Expectations
MS-PS1-2. Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.