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 ...

A neutralisation reaction is one in which an acid reacts with a base to form water. A salt is also formed in this reaction. Bases are metal oxides, metal hydroxides and metal carbonates.

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 ...

Neutralisation is the reaction of an acid with a base that results in the pH moving towards 7. It is a useful process that occurs in everyday life such as in the treatment of acid indigestion and ...

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, ...

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 ...