The pH scale is used to measure acidity and alkalinity. When an acid is neutralised, it forms a salt. Making salts Acids react with metals, bases and carbonates to produce salts. Neutralisation is ...

When an alkali is neutralised, its pH decreases towards seven. Several different bases can neutralise acids. A salt and water are always produced as a result of these reactions. Metal oxides and ...

A compound in the form of crystals that consists of sodium chloride (NaCI) and is used especially for seasoning or preserving ...

Students will also be able to explain that different substances react in characteristic ways that can be used to identify a substance. A pH or acid-base indicator is a compound that changes color ...