In 1767, Swedish chemist Torbern Bergman synthesized alum by boiling alunite in sulfuric acid and incorporating potash to the answer. He also synthesized alum being a reaction item concerning sulfates of potassium and earth of alum, demonstrating that alum was a double salt. Aluminum is found in character as alum https://horecabusiness.blogpostie.com/50888405/getting-my-aluminium-to-work