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Zeta potential curves of Al2O3 and SiO₂ powders are given in the figure below. In order to prepare a stable slurry containing both Al2O3 and SiO2 particles, which pH would be the optimum? Zeta Potential (mV) 100 50 0 A1203 S102 10 12 14

Zeta potential curves of Al2O3 and SiO₂ powders are given in the figure below. In order to prepare a stable slurry containing both Al2O3 and SiO2 particles, which pH would be the optimum? Zeta Potential (mV) 100 50 0 A1203 S102 10 12 14

Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter21: The Chemistry Of The Main Group Elements
Section: Chapter Questions
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### Zeta Potential Curves Analysis **Question:** Zeta potential curves of Al₂O₃ and SiO₂ powders are given in the figure below. In order to prepare a stable slurry containing both Al₂O₃ and SiO₂ particles, which pH would be the optimum? **Graph Description:** The graph in the figure plots Zeta Potential (in mV) against pH values, ranging from 0 to 14. Two curves represent the zeta potentials for Al₂O₃ and SiO₂. The curve for Al₂O₃ shows a positive zeta potential at low pH values and decreases as pH increases, shifting to negative at higher pH values. Conversely, the curve for SiO₂ remains negative across the entire pH range and becomes more negative with increasing pH. This suggests that the optimal pH for slurry stability would be at a point where the absolute value of the zeta potential is as high as possible for both materials, enhancing electrostatic repulsion and preventing particle aggregation. **Multiple Choice Options:** - ⃝ pH 11 - ⃝ pH 9 - ⃝ pH 2 - ⃝ pH 6 - ⃝ pH 3
Transcribed Image Text:### Zeta Potential Curves Analysis **Question:** Zeta potential curves of Al₂O₃ and SiO₂ powders are given in the figure below. In order to prepare a stable slurry containing both Al₂O₃ and SiO₂ particles, which pH would be the optimum? **Graph Description:** The graph in the figure plots Zeta Potential (in mV) against pH values, ranging from 0 to 14. Two curves represent the zeta potentials for Al₂O₃ and SiO₂. The curve for Al₂O₃ shows a positive zeta potential at low pH values and decreases as pH increases, shifting to negative at higher pH values. Conversely, the curve for SiO₂ remains negative across the entire pH range and becomes more negative with increasing pH. This suggests that the optimal pH for slurry stability would be at a point where the absolute value of the zeta potential is as high as possible for both materials, enhancing electrostatic repulsion and preventing particle aggregation. **Multiple Choice Options:** - ⃝ pH 11 - ⃝ pH 9 - ⃝ pH 2 - ⃝ pH 6 - ⃝ pH 3
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