Save guides, add subjects and pick up where you left off with your BBC account. Pure water is neutral. However, water comes from different sources, like tap water or river water. These water ...

Discover how red cabbage can act as a natural pH indicator, revealing whether substances are acids or bases through beautiful color changes. pH is a measure that tells us how acidic or basic a ...

Each strip changes color after testing the liquid, and you can easily read the pH value using the included pH indicator chart. Versatile Applications: These pH test strips are ideal for various ...