Is It an Acid or a Base? Testing Household Items

Next Generation Science

This educational video demonstrates a classic science experiment suitable for elementary and middle school students: testing the pH levels of common household substances to determine if they are acids or bases. Using litmus paper as an indicator, the presenter tests four distinct liquids—window cleaner, lemon juice, vinegar, and a baking soda solution—providing a clear visual representation of chemical properties. The video explores key themes of chemical classification, observation, and data recording. It introduces the concept of litmus paper as a tool that changes color in reaction to pH levels, establishing the rule that acids turn the paper red while bases turn it blue or green. The segment concludes by synthesizing the findings into a clear data table, modeling how scientists organize their results. For educators, this video serves as an excellent hook or demonstration for units on matter, chemistry, or the scientific method. It provides a safe, replicable experiment that allows students to see abstract chemical properties manifested through observable color changes. The clear pacing and visual reinforcement make it ideal for introducing the vocabulary of "acid" and "base" before students conduct their own hands-on investigations.