It demonstrates how substances like tea, red cabbage, and litmus paper react when acids are added, leading to visible color changes. The film explains the chemical reactions involved, particularly ...

Damp litmus paper is bleached white when it is placed in chlorine. If damp-blue litmus paper is used, the paper turns red then white.

Ammonia, NH 3, is an alkaline gas and so turns damp red litmus paper blue. Ammonium ions (NH 4 +) – found in ammonium compounds such as ammonium chloride, ammonium nitrate and ammonium sulfate ...

You remember: you’d dip a bit of pinkish litmus paper into some liquid and watch for the reaction. “Acidic” is a probably good way to describe the way Donald Trump is treating Canada these days.

Of course you do. In chemistry class, a “litmus test” was the way you checked the acidity of a substance. You remember: you’d dip a bit of pinkish litmus paper into some liquid and watch for the ...