This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American I remember learning about acids and bases (or ...

pH is a measure of a solution's acidity or alkalinity. Acids have a pH below 7, releasing hydrogen ions when dissolved in water, while bases have a pH above 7, releasing hydroxide ions. Enzymes have ...

Indicators are substances that change colour when they are added to acidic or alkaline solutions. Universal indicator is the indicator most commonly used in the laboratory. If universal indicator is ...

Prefer Newsweek on Google to see more of our trusted coverage when you search. The pH scale that is widely accepted and used by scientists didn't actually exist until 1909. Before then scientists had ...

Google celebrated the life of Søren Peder Lauritz (S.P.L.) Sørensen on Tuesday with an interactive homepage doodle that pays tribute to the Danish chemist. While Sørensen was working as the chemical ...

In certain molecules, the so-called photoacids, a proton can be released locally by excitation with light. There is a sudden change in the pH value in the solution—a kind of fast switch that is ...

All substances have properties. These describe how a substance looks and behaves. There are two types of properties: physical and chemical. Watch this video about how physical and chemical properties ...