How would you expect the Group 13 element to hydrogen bond enthalpy to change as the group
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How would you expect the Group 13 element to hydrogen bond enthalpy to change as the group is descended? Hence explain the nonexistence of TlH3.
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The most important oxo salts of Group 13 are the alums, MAI(SO4)₂-12H₂O, where M is a univalent cation such as Na+, K+, Rbt, Cst, Tl, or NH. Gallium and In can also form analogous series of salts of this type, but B and Tl do not. The alums can be thought of as double salts containing the hydrated trivalent cation [Al(OH₂)]³+. The remaining water molecules form hydrogen bonds between the cat- ions and sulfate ions. The mineral alum, KAl(SO4)₂ 12H₂O, from which aluminium takes its name, is the only common, water-soluble, aluminium-bearing mineral. It has been used since ancient times as a mordant to fix dyes to textiles. The mordant forms a coordination complex with the dye which then attaches to the fabric, preventing it from being washed out. The term ‘alum' is used widely to describe other com- pounds with the general formula M(I)M'(III) (SO₂)₂ 12H₂O, where M' is often a d metal, such as Fe in 'ferric alum', KFe(SO4)2-12H₂O.
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As we descend Group 13 also known as the boron group in the periodic table the hydrogen bond enthalpy is expected to decrease Hydrogen bond enthalpy i...View the full answer
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Deepak Sharma
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Related Book For
Inorganic Chemistry
ISBN: 9780198768128
7th Edition
Authors: Mark Weller, Tina Overton, Jonathan Rourke
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