Q6 of 270 Page 79

Which is more acidic: a solution of pH = 2 or a solution of pH = 6?

A solution of pH=2; higher the hydrogen ion concentration, lower is the pH value.

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4 Why does tooth decay start when the pH of mouth is lower than 5.5? 5 What is the pH of a neutral solution? 7 Which is more basic (or more alkaline): a solution of pH = 8 or a solution of pH = 11? 8 Name the scientist who developed the pH scale.