(a) Use data in Appendix 11 to give a quantitative
explanation why H2 can be prepared from the reaction of Zn with dilute mineral acid, but not from Cu with a dilute acid.
(b) The ion [H13O6]+ can exist in more than one isomeric form. One that has been structurally characterized is described in terms of [(H5O2)(H2O)4]+, in which an [H5O2]+ unit containing a strong hydrogen bond is centrally positioned within the [H2O2]4 ion. Draw a schematic representation of this ion and give a description of the bonding within it.
(c) The IR spectrum of gaseous SbH3 shows absorptions at 1894, 1891, 831 and 782 cm 1. Comment on why this provides evidence that SbH3 has C3v rather than Z)3h symmetry.
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