sentence2_structure: The ph scale measures acids<>and<>bases$$$The ph scale measures acids<>and bases and has<>7$$$The ph scale measures acids<>and bases and has 7 as<>a neutral value$$$bases<>and has<>7$$$bases<>and has 7 as<>a neutral value$$$7<>as<>a neutral value
sentence1: pH a measurement scale indicating acidity and alkalinity in which values less than 7 are acidic, the value of 7 is neutral, and values from 7 to 14 are basic (alkaline).
sentence2: The ph scale measures acids and bases and has 7 as a neutral value.
question: Which scale measures acids and bases and has 7 as a neutral value?