A solution with a pH value which is less than 7 is acidic. The acids which react with metals usually have quite a low pH, of either 3 or less. Some metals react with acids and when they do the ...

Explain to pupils that our stomachs contain hydrochloric acid. The following reaction could be demonstrated by the teacher or carried out by pupils in small groups. (Eye protection and caution needed ...

Science presenter Jon Chase demonstrates an exothermic and an endothermic reaction, and explains how temperature changes can be used to identify which reaction is which. The exothermic reaction is the ...

THE corrosion of a metal in acid solution involves essentially the transfer to another species of one or more electrons by the metal atom, followed by solvation in the aqueous solution. In order to ...

Acids are reactive, and even weak acids like vinegar can wow students with their reactivity. But strong acids can really put on a show, dissolving otherwise relatively inert metals. And aqua regia, or ...