Pure water is neutral, and so is petrol. Litmus indicator solution turns red in acidic solutions and blue in alkaline solutions. It turns purple in neutral solutions. Litmus paper close litmus paperA ...

In a bid to combat food waste and enhance safety, researchers have introduced a pioneering method for gauging the freshness of raw beef using on-pack pH indicators. This new system provides consumers ...

pH is a measurable parameter between the values of 0 and 14, defining the acidity or alkalinity of a solution. Solutions with a pH = 7 are considered neutral, pH < 7 are considered acidic and pH > 7 ...