Antacid tablets contain bases such as magnesium hydroxide and magnesium carbonate to neutralise the extra acid. When an acid is added to an alkali the pH of the acid increases towards 7 and the pH ...

For example, drain cleaners and ... This is measured using the pH scale, which runs from pH 0 to pH 14. Neutral solutions have a pH of 7 Acids have a pH less than 7 Alkalis have a pH greater ...