Practice question

pH = pKa + log ([A⁻]/[HA]) is the scientifically accurate answer to this question. Within the study of pH and Buffer, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of pH = pKa + log ([A⁻]/[HA]) directly address what is being asked. Among the other options, pH = log [H⁺], pH = -log [OH⁻], and pH = Kw / [H⁺] do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.