inorganikc Chemistry 316 Exa March 13, os Page Use the Born-Haber eycle to cakcu
ID: 1028063 • Letter: I
Question
inorganikc Chemistry 316 Exa March 13, os Page Use the Born-Haber eycle to cakculate the enthalpy of formation of Mgo, which crystallizes in n the calculation O, bond energy 247 ki/mele anulMg). 37umok. Second ionization energy or Mg·14Ski/moles second electron amnity at --744 k/mole. The Madelung constant for the rutile crystal structure the anticipated crystal radius for Mg 86pm, and for O -126pm is 2 380. p 30pm eane 2.307 x 10*m 8. Give the chemical name for the following coordination complexes: (a) [Co(en)(NHs)2 Ch]Br (b) KlCr(CNJ]Explanation / Answer
8- (A)--here cation is in coordination sphere and anion is bromine, we must place the name of cation first
diamine for (NH3)2, Ethylenediamine (abbreviated as (en) when a ligand) is the organic compound with the formula C2H4(NH2)2, DICHLORO for Cl2
charge on coordination sphere will be +1, so oxidation number of co will be x+0+0+(-2)=1
will be 1. its name will be diaminedichloroMono(ethylenediamine)cobalt(1)bromide.
(B)--here the cation is potassium, so the name will be
potassium hexacynochromate(4).
oxidation number of cr will be x+(-6)=-2
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