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The behavior of Electrophoretic Mobility (EBT) changes with pH due to the alteration of the surface charge of particles in a solution. As pH increases, the ionization of functional groups on the particle surface can lead to a more negative charge, enhancing negative mobility. Conversely, at lower pH levels, these groups may become protonated, resulting in a reduced or even positive charge, which can decrease negative mobility. Thus, EBT is highly sensitive to pH variations, affecting particle interactions and movement in an electric field.

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2mo ago

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The behavior of EBT (Eriochrome Black T) changes with changes in pH because this indicator undergoes different color changes depending on the acidity or basicity of the solution. At lower pH levels, EBT appears red, while at higher pH levels it transitions to blue. This color change can be used to determine the endpoint of acid-base titrations.


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The color of the EBT indicator changes from red to yellow as pH increases. EBT transitions from its acidic form to its basic form as pH rises above its pKa of approximately 7.0, causing the color change.


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