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Chapter 23: Q35 P (page 1059)
Why is chromium so useful for decorative electroplating?
Chromium so very useful for decorative electroplating because it protects material under from corrosion.
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In terms of the theory of color absorption, explain two ways that a solution can be blue.
As a fuel, H2(g) produces only nonpolluting when it burns. Moreover, it combines with O2(g) in a fuel cell (Chapter 21) to provide electrical energy.
(a) Calculate and per mole of at 298 K.
(b) Is the spontaneity of this reaction dependent on T? Explain.
(c) At what temperature does the reaction become spontaneous?
A metal ion uses d2sp3 orbitals when forming a complex. What is its coordination number and the shape of the complex?
Question: (a) What behaviour distinguishes paramagnetic and diamagnetic substances?
(b) Why are paramagnetic ions common among transition elements but not main-group elements?
(c) Why are coloured solutions of metal ions common among transition elements but not main-group elements?
Is a complex with the same number of unpaired electrons as the free gaseous metal ion termed high spin or low spin?
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