Example 4.3
Chapter 4: The d - and f - Block Elements · CHEMISTRY · EN medium
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. Which of the d series of the transition metals exhibits the largest number of oxidation states and why? Table . contains the thermochemical parameters related to the transformation of the solid metal atoms to M + ions in solution and their standard electrode potentials. The observed values of E V and those calculated using the data of Table . are compared in Fig. . . The unique behaviour of Cu, having a positive E V , accounts for its inability to liberate H from acids. Only oxidising acids (nitric and hot concentrated sulphuric) react with Cu, the acids being reduced. The high energy to transform Cu(s) to Cu + (aq) is not balanced by its hydration enthalpy.
📖 ncert books class 12 chemistry chapter 4 · Page 9
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. Which of the d series of the transition metals exhibits the largest number of oxidation states and why? Table . contains the thermochemical parameters related to the transformation of the solid metal atoms to M + ions in solution and their standard electrode potentials.
The observed values of E V and those calculated using the data of Table . are compared in Fig. . .
The unique behaviour of Cu, having a positive E V , accounts for its inability to liberate H from acids. Only oxidising acids (nitric and hot concentrated sulphuric) react with Cu, the acids being reduced. The high energy to transform Cu(s) to Cu + (aq) is not balanced by its hydration enthalpy. The general trend towards less negative E V values across the
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