The scale below shows the pH levels of various liquids. pH scale showing ammonia (11.6), sea water (8.3), pure water (7), vinegar (2.5), and battery acid (1) pH scale showing ammonia (11.6), sea water (8.3), pure water (7), vinegar (2.5), and battery acid (1) Which of the following substances is a strong acid? Choose 1 Choose 1 (Choice A) A Ammonia (Choice B) B Sea water (Choice C) C Battery acid (Choice D) D Pure water