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Abstract The change in weight induced by a magnetic field for three solutions ofcomplexes was recorded The change in weight of a calibrating solution of 2997 WW ofNiCl2 was recorded to calculate the apparatus constant as 57538 cv and cm for eachsolution was determined in order to calculate the number of unpaired electrons for eachparamagnetic complex FeNH42SO426H20 had 4 unpaired electrons KMnO4 had zerounpaired electrons and K3FeCN6 had 1 unpaired electron The apparent 1 unpairedelectron in K3FeCN6 when there should be five according to atomic orbital calculationsarises from a strong ligand field produced by CN-Introduction The magnetic susceptibility is a phenomena that arises when a magneticmoment is induced in an object This magnetic moment is induced by the presence of anexternal magnetic field This induced magnetic moment translates to a change in the weightof the object when placed in the presence of an external magnetic field This inducedmoment may have two orientations parallel to the external magnetic field of orperpendicular to the external magnetic field The former is known as paramagnetism and thelater is known as diamagnetism The physical effect of paramagnetism is an attraction tothe source of magnetism increase in weight when measured by a Guoy balance and thephysical effect of diamagnetism is a repulsion from the source of magnetic field decreasein weight when measured by a Guoy balance The observed magnetic moment is derived by the change in weight Thisobserved magnetic moment arises from a combination of the orbital and spin moments of theelectrons in the sample with the spin component being the most important source of themagnetic moment This magnetic moment is caused by the spinning of an electron around anaxis acting like a tiny magnet This spinning of the magnet results in the magneticmoment Paramagnetism results from the permanent magnetic moment of the atomThese permanent magnetic moments arise from the presence of unpaired electrons Theseunpaired electrons result in unequal number of electrons in the two possible spin states12 -12
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