This document discusses acids and bases, including their properties and how to test for them. It provides information on: - The pH scale ranges from 0-14, with acids having lower values and bases having higher values. A pH of 7 is neutral. - Acids donate H+ ions in solution and have a pH below 7. Bases donate OH- ions and have a pH above 7. - Indicators like litmus paper and cabbage juice can be used to test if a substance is acidic or basic - acids turn indicators one color while bases turn them another. - Common household substances like lemon juice, vinegar, baking soda and bleach are identified along the pH scale. - A