the number that indicates the relative strength of acids and bases in a substance
pH
The number that indicates the relative strength of acids and bases in a substance is called the pH value. The pH scale is a measure of acidity or basicity of a solution and ranges from 0 to 14. pH 7 is considered neutral, pH values below 7 indicates acidic solutions and pH values above 7 indicates basic solutions. The strength of an acid or base is determined by the concentration of hydrogen ions (H+) or hydroxide ions (OH-) in the solution. Therefore, a lower pH value indicates a higher concentration of hydrogen ions, making the solution more acidic, while a higher pH value indicates a higher concentration of hydroxide ions, making the solution more basic.
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