In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Antimony pentafluoride is a part of the magic one. The Hammett function measures the strength of these. The log of their disassociation constant plus the log of the reduced form over the original makes up the right side of the Henderson-Hasselbalch equation. According to Lewis these are electron pair acceptors, while according to Bronsted, these are proton donors. For 10 points, name these chemicals such as HCL that lower the pH of a solution.
Fine Arts