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 ...

In order to determine soil pH, gardeners must first conduct a soil test. A soil test tells you what amendments to consider ...

In the middle, neutral pH 7 is indicated by green. When using universal indicator paper, we get more accurate results by putting only a small spot of the test solution on the paper, and then ...

The yellow scale on the left shows the amount of chlorine in the water. This test for chlorine is not a pH test but the reddish color on the right is a pH indicator, which shows the how acidic or ...