# How to Calculate H3O for a pH of 8.53

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A solution's pH measures its acidity, which is the concentration of hydronium (H3O+) ions in it. These hydronium ions form when a hydrogen ion, or a proton, detaches itself from a molecule that dissociates in water. The proton then joins a water molecule, forming a positively charged ion. The pH scale is logarithmic, which means that every change in a solution's pH corresponds with a tenfold change in the concentration of hydronium ions.

• Multiply 8.53 by -1 -- 8.53 --- -1 = -8.53.

• Raise 10 to the power of this value -- 10^-8.53 = 2.95120923 --- 10^-9.

• Round your result. The solution has a hydronium concentration of 2.95 --- 10^-9 moles per liter, or just under 3 --- 10^-9 M.

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