Explain the following experimental observations: a) Two coordination compounds with the same empirical formula, Co(NH3)5(NO3)2SO4, are each added to water to make 0.1 M solutions. One solution remains neutral but the other becomes basic. Give the formula for each compound and name the type of isomerism represented by these two compounds.
b) The complex ion [PtCl2(NH3)2]2+ is square planar and has two different isomers. One of the compounds is polar and the other is nonpolar. Draw the compounds and determine which compound is polar.
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