Pure water sits in the middle at pH 7. Understanding pH is crucial in many areas of ... and bases in everyday substances by observing their interaction with a natural indicator.

The color that a substance turns a pH indicator is a characteristic property of that substance. An acid can neutralize a base, and a base can neutralize an acid Students squeeze red cabbage leaves in ...

However, water comes from different sources, like tap water or river water. These water samples have other substances dissolved in them. They might show up as slightly acidic or slightly alkaline ...

(We used a bottled, 100% natural spring water product.) Add enough of the bromthymol blue indicator solution to each bottle to obtain a green color (about 2–3 mL). BTB should be green in color. Add ...

If universal indicator is added to a solution it changes to a colour that shows the pH of the solution. Universal indicator is a mixture of a variety of other indicators and can be used to measure ...