Depict the predominance diagram

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Reference no: EM13237817

Selenide can form hydrogen selenidic acid (H2Se(aq)), biselenide (HSe-(aq)) ion and selenide ion (Se2-(aq)). The equilibrium constants can be calculated from the attached thermodynamic data.a) If I add 0.001 moles of NaHSe to a kilogram of water [ΣSe(-II) = 10-3 m].Write the Mass Balance Equations, the Proton-Balance Equations and the Equilibrium Relations for addition of NaHSe to water.b) Draw the predominance diagram (the logarithm of species concentration versus pH). Locate the system points and the approximate pH that satisfies the Proton-Balance Equation for addition of NaHSe to water.c) List the solute species present at pH=5.3 and their approximate concentrations.d) What is the equilibrium constant at 70oC for:H2Se(aq) = HSe-(aq) + H+(aq)

Reference no: EM13237817

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