Knowra Acidity Acidity Acidity is the extent to which a substance exhibits acidic properties, commonly described by its capacity to donate protons or increase hydrogen-ion concentration in water. It is often expressed using pH, where lower values indicate greater acidity.
Acid : A substance that donates protons, accepts electron pairs, or increases hydrogen-ion concentration in water, depending on the acid–base framework. Acidity describes the characteristic that acids exhibit.
pH : A logarithmic measure of hydrogen-ion activity in a solution, conventionally defined as its negative base-ten logarithm. This is the most common numerical expression of aqueous acidity.
Soil pH : A measure of hydrogen-ion activity in soil solution, used to characterize soil acidity or alkalinity. Soil acidity affects nutrient availability and plant growth.
Alkalinity : A measure of water's capacity to neutralize added acid, usually arising from bicarbonate, carbonate, and related bases. Unlike pH, alkalinity measures resistance to acidification rather than current acidity.
Corrosion : The deterioration of a material through chemical or electrochemical reactions with its environment. Acidic conditions can accelerate corrosion of metals and other materials.
Base : A substance that accepts protons, donates electron pairs, or decreases hydrogen-ion concentration in water, depending on the acid–base framework. Bases counter acidic behavior by accepting protons or reducing hydrogen-ion concentration.
Acid dissociation : The reversible separation of an acid into a proton and its conjugate base in a solvent. Dissociation releases protons and helps determine a solution's acidity.
Ocean acidification : The ongoing decrease in ocean pH, primarily caused by seawater absorbing carbon dioxide from the atmosphere. It shows how acidity can change across an entire environment.
Basicity : The degree to which a substance exhibits basic properties, including proton acceptance or hydroxide-ion production in water. Basicity is the chemical counterpart to acidity.
Carbonate compensation depth : The ocean depth below which calcium carbonate dissolves faster than it accumulates on the seafloor. Greater ocean acidity favors carbonate dissolution and can shift this boundary.
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