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[H+]
The concentration of hydrogen ions in a solution, often used as a measure of the acidity of a solution, with lower values indicating higher acidity.
HBr
Hydrobromic acid, a strong acid formed by dissolving hydrogen bromide in water.
[H+]
[H+] denotes the concentration of hydrogen ions in a solution, which is a measure of the acidity or alkalinity (pH) of the solution.
K
The chemical symbol for Potassium, a soft, silver-white metal belonging to the alkali metal group of the periodic table.
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