Problem: A sodium ion, Na+, with a charge of 1.6 x 10–19 C and a chloride ion, Cl–, with charge of -1.6 x 10–19, are separated by a distance of 5.3 nm. How much work would be required to increase the separation of the two ions to an infinite distance?

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F=kq1q2d2

W=F×d=F=(kq1q2d2)(d)W=(kq1q2d)

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A sodium ion, Na+, with a charge of 1.6 x 10–19 C and a chloride ion, Cl, with charge of -1.6 x 10–19, are separated by a distance of 5.3 nm. How much work would be required to increase the separation of the two ions to an infinite distance?