Answer Happy

27. According to the following reticular energy values, Ur (kJ/mol), the most water- insoluble compound es_ y the most water-soluble compound is F CI- Br |- 0²- Li+ -1049.0 -862.0 -818.6 -762.7 -2830 Nat -927.7 -786.8 -751.8 -703 -2650 a) Lii // Nai b) LiF // NaF c) Nai // Li₂0 d) Li₂O // Nai 28. The relative solubility of silver halides is found to be: AgF > AgCl > AgBr > Agl. Based on these data we can conclude that the trend in solubility reflects that: a) Ag+ is hard and l- is hard b) Ag+ is hard and F- is hard c) Ag+ is soft and l- is soft d) Ag+ is soft and F- is soft 29. According to the band diagrams below, it can be said that: A B C BC BC E E₂= 10 ev BV a) A is a metal b) B is a metal c) A is an insulator d) B is an insulator = 1 eV BV BC BV

30. From the diagram below we can conclude that: Banda donadora E Banda aceptora (A) (B) a) The material in (A) is an intrinsic semiconductor b) The material in (A) is a p-type semiconductor c) The material in (B) is a p-type semiconductor d) The material in (B) is an intrinsic semiconductor 31. The scientist who distinguished himself by his contribution to inorganic chemistry and was able to explain the connectivity and geometry of coordination compounds was... a) Jorgensen b) Blomstrand c) Werner d) Holland