The main acid is phosphoric acid and the fizz is produced by weak carbonic acid. There are no strong alkalies, but there are some alkaloids: the main one being caffeine.
Alkali
No an alkali is the opposite of an acid. Alkali = basic; acid = acidic.
alkali is used to reduce acid and acid is used to reduce alkali
alkali
acids
All alkali metals and alkali earth metals below calcium react vigorously with acids.
i think acids
Neither
No. Alkali's and acids are an separate ends of the pH scale, the pH of acids being 1, 2, 3, 4 and 5 (strong to weak) and the pH of alkali's being 11, 12, 13, 14 and 15 (weak to strong). Examples of acids are hydrochloric acid (strong) and vinegar (weak). Toothpaste is an example of a weak alkali.
Magnesium oxide is a basic compound, also known as an alkali. It reacts with acids to form salts and water.
This substance is called a pH indicator.
Alkali's neutralise acids. For example, toothpaste is an alkali that neutralises acid in the mouth.