They may cover all or part of the body and are usually very itchy. 1  Hives usually break out first on the covered areas of the skin such as the trunk and upper parts of the arms and legs.  Wheals appear in batches. Each wheal may last from a few minutes to six hours.
Early years [edit]. Arrhenius was born on February 19, 1859, at Vik (also spelled Wik or Wijk), near Uppsala, Sweden, the son of Svante Gustav and Carolina Thunberg Arrhenius.oday, Arrhenius is best known for his study published in 1896, on the greenhouse effect.
These electrically-conductive compounds were termed Arrhenius acids. By definition, Arrhenius acids are compounds that produce hydrogen ions (H+) in solution. Let's take a closer look at the chemical structure of an Arrhenius acid.Hydrobromic acid is an Arrhenius acid with the formula HBr.n the 1880s, Swedish chemist Svante Arrhenius was busy studying the electrical properties of chemicals when put in water. In his studies, he noticed that certain compounds produced hydrogen ions, often called protons, when they were put into aqueous (or water-based) solution.