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chem 9+10 - Group GroupI/1(Cont Notes ,...

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Chemistry 6C Rest of Chapter 14 Handout Group Reactions Group I/1 (Cont.) Notes: -very low first ionization energy, so most exist as charged  cations and have negative  E O -low melting points, boiling points, and densities (these  properties increase down the column) -strong reducing agents that react with water, some  reactions are so vigorous that hydrogen can be ignited -so reactive that they are not found in free state and are  obtained by electrolysis of their molten salts 4Li + O 2  2Li 2 O Na+O 2 Na 2 O 2 Na 2 O 2  + 2H 2 O    Na +  + OH -  + H 2 O 2 K+O 2 KO 2 KO 2 +2H 2 O 3O 2 +KOH KOH+4CO 2 KHCO 3 Group II/2 Notes: -Be has more covalent character than ionic (i.e. BeCl 2 ) -Oxygen can exist in 3 states: O 2-  (oxide), O 2 - (superoxide),  O 2 2-  (peroxide) -CaO is a  basic oxide Be+ 2OH -  + 2H 2 O  Be(OH) 4 2- + H 2 2Sr + O 2   2SrO Ba+O 2 BaO 2 Mg(OH) 2 +2H +
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