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

Figure 13

Plot of the effective partial molar volume of ionic vacancy in the oxidation of FERRO ion against the molality of FERRO ion. ∘, the measured values; broken line, the average value. The measured effective partial molar volume,(𝑉_𝑣)_eff=−8.77×10⁻⁶±1.33×10⁻⁵m³ mol⁻¹; the expected partial molar volume of ionic vacancy with −1 unit charge, 𝑉_𝑣=2.13×10⁻⁴m³ mol⁻¹.