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Distribution of the tightly bound Mg2+ ions for the states with θ = 120°, 90°, and 60° in a mixed solution with 0.001 M Mg2+ and 0.05 M Na+. The outmost spheres with color changing from dark to light represent phosphates with strong to weak charge neutralization, i.e., more ions are found around the dark color spheres (phosphates) than around the lighter color spheres (phosphates).
