Maharashtra BoardEnglish MediumSTD 9ScienceAcids, Bases and Salts5 Marks
Question
What is pH scale?
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Answer
1. In 1909 , the Danish scientist Sorensen introduced a convenient new scale of expressing $H ^{+}$ion concentration which is found to be useful in chemical and biochemical processes. 2. It is the $pH$ scale ( $pH$ : power of hydrogen). The $pH$ scale extends from 0 to 14. According to this scale pure water has a $pH$ of $7 . pH 7$ indicates a neutral solution. This $pH$ is the midpoint of the scale. 3. The $pH$ of an acidic solution is less than 7 and?
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