In 1767, Swedish chemist Torbern Bergman synthesized alum by boiling alunite in sulfuric acid and adding potash to the answer. He also synthesized alum as a response merchandise concerning sulfates of potassium and earth of alum, demonstrating that alum was a double salt. Observe: -W is a comparatively soft intermediary https://comprar-casa-lisboa57776.get-blogging.com/29143443/fascination-about-aluminium