An acid-base indicator is a substance that changes color as the pH of the solution changes. Indicators work because they are weak acids which when in solution, exist in equilibrium with their ...

When additional base is added, the precipitate dissolves. The reactions can then be reversed with the addition of hydrochloric acid. The precipitate will reappear and then redissolve. Turn on stir ...

Red cabbage contains a chemical called anthocyanin. This pigment is a natural acid-base indicator. It is blue in neutral substances, like plain water. When an acid like lemon juice gets in the water, ...

A pH or acid-base indicator is a compound that changes color depending ... property of a substance and that a color change can also be used as evidence that a chemical reaction has occurred. Students ...

This reaction, essential to acid-base chemistry, is typically understood to yield two water molecules (H 2 O). However, the new experimental evidence demonstrates that electron-transfer mechanisms ...