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 ...

They have also seen reactions in which an acid or a base reacted to change the color of a pH indicator solution. Do you think that the reactions you will carry out may produce a gas? Yes. At least one ...

Several different bases can neutralise acids, and water is always produced as a result of these reactions. Metal oxides and alkalis are two types of base. Basic substances neutralise acids ...

Reactions of metals with acids Acids react with some metals to produce salts and hydrogen. The salt name can be found from the name of the acid and metal. Acids and bases Acids, bases and alkalis ...