Hydrogen in water reacts with minerals in the rock or there is a combination of the H+ and OH- ions in the water and the ions of the mineral. The rate of hydrolysis depends on the amount of H+ ions, which in turn depends on the composition of air and water in the soil, the activity of organisms, the presence of organic acids and the cation exchange. ... According to Schaetzl and Anderson, Carbonation is a general term for weathering processes associated with CO2 in aqueous solution. ...

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It also occurs in other fruits in vegetables and in animal tissues and fluids either as the free acid or as citrate ion. ... Crystallization of citric acid from a hot aqueous solution yields anhydrous citric acid; crystallization from a cold solution yields the monohydrate. ... The metal is solubilized as the complex ion and following extraction, the pure metal is recovered by reduction with zinc dust. In silver-plating, a smooth adherent deposit is obtained on a metal cathode when electrolysis is carried in presence of an excess of cyanide ion. ...

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