The dipole moment of the water molecule 1H2O2 is 6.17 *

Chapter 21, Problem 21.56

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The dipole moment of the water molecule 1H2O2 is 6.17 * 10-30 C # m. Consider a water molecule located at the origin whose dipole moment p S points in the +x@direction. A chlorine ion 1C1-2, of charge -1.60 * 10-19 C, is located at x = 3.00 * 10-9 m. Find the magnitude and direction of the electric force that the water molecule exerts on the chlorine ion. Is this force attractive or repulsive? Assume that x is much larger than the separation d between the charges in the dipole, so that the approximate expression for the electric field along the dipole axis derived in Example 21.14 can be used.