A Review Of structure and uses of ddt bhc and chloramine
This document discusses pH perseverance approaches. It defines pH because the unfavorable logarithm of hydrogen ion concentration and describes how Sorensen made the pH scale in 1909. A pH of seven is neutral as hydrogen and hydroxide ion concentrations are equivalent.テキストはクリエイティブ・コモンズ 表示-継承ライセンス