Each whole number on the ph scale represents a - fold difference in hydrogen ion concentration.

10 The ph scale is defined as the negative power of 10 moles of hydrogen ions. A solution with 10^-7 mol/L of hydrogen ions is considered neutral. Lower ph numbers represent acids and higher ph numbers represent bases. For instance, something with a ph of 6 would have 10^-6 mol/L of hydrogen ions which is 10 times as many ions as 10^-7 mol/L.

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