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 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 ...

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

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 ...