Buoyancy Effect of Ionic Vacancy on the Change of the Partial Molar Volume in Ferricyanide-Ferrocyanide Redox Reaction under a Vertical Gravity Field

Figure 14

Plot of the effective partial molar volume of ionic vacancy in the reduction of FERRI ion against the molality of FERRI ion. ∘, the measured value; broken line, the average value. The measured effective partial molar volume, (𝑉_𝑣)_eff=−3.80×10⁻⁵±1.09×10⁻⁵ m³ mol⁻¹; the expected negative partial molar volume of ionic vacancy with −1 unit charge, −𝑉_𝑣=−2.13×10⁻⁴m³ mol⁻¹.