Ionic Mobility & Ionic Size: What's the Connection?

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Ionic mobility generally increases as ionic size decreases, serving as a useful rule of thumb in understanding ion movement. Smaller ions experience less resistance in a medium, making them easier to transport compared to larger ions. This concept is likened to the ease of moving a small boat versus a large ocean liner, illustrating the principle that size impacts mobility.
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is it true that the ionic mobility increases with the decrease of the ionic size?
 
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Just a rule of thumb. But yes - small ions are easier to move. It is not much different from propelling a ship - it is much easier to move a small boat than a huge ocean liner.
 

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