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Interactive 3D chemistry animations of reaction mechanisms and 3D models of chemical structures for students studying University courses and advanced school chemistry hosted by University of Liverpool.
29 Αυγ 2023 · Most sulfates, including those of \(\ce{Na^{+}}\), \(\ce{K^{+}}\), and \(\ce{NH4^{+}}\), are soluble in water. Exceptions that are insoluble are white lead(II) sulfate and white barium sulfate: \[\ce{BaSO4(s) <=> Ba2+(aq) + SO42-(aq)} \nonumber \] with \(K_{sp} = 1.4 \times 10^{-8}\) \[\ce{PbSO4(s) <=> Pb2+(aq) + SO42-(aq)} \nonumber \]
There are several tests for sulfate ion to identify from other anions in qualitative analysis. Some of metal sulfate compounds are soluble in water and some metal sulfates form precipitates. Sulfate compounds of several d block metal cations form colours.
The electrode reactions and products of the electrolysis of acidified water are illustrated by the theory diagram above. The half-equations for the electrolysis of water (electrolyte of acidified with dilute sulphuric acid). (a) The negative cathode electrode reaction for the electrolysis of water.
Learning Objectives. By the end of this section, you will be able to: Predict whether a salt solution will be acidic, basic, or neutral. Calculate the concentrations of the various species in a salt solution. Describe the acid ionization of hydrated metal ions. Salts with Acidic Ions.
Individual cations and anions that are each surrounded by their own shell of water molecules are called hydrated ions. We can describe the dissolution of NaCl in water as \[NaCl(s) \xrightarrow{H_2O(l)} Na^+ (aq) + Cl^- (aq) \label{4.1.1}\] where (aq) indicates that Na + and Cl − are hydrated ions.
The most frequently encountered forms of sulfur in fresh waters are as the anion sulfate (SO4-2) in combination with the common cations and as hydrogen sulfide (H2S). The thresholds of taste and smell were reported to be 0.2mg/L of sulfides in pulp mill wastes. Sulfate is not highly soluble.
