VII. Acid-Base Reactions

A. Bronsted acid-base reaction: H+ transferred.

B. Lewis acid-base reaction: an electron deficient species (such as boron) reacts with a compound with a free lone pair of electrons (such as nitrogen).

VIII. Complex ion formation & breakup

A. Zn2+ and Al3+ complex with OH-; forms Zn(OH)42-, Al(OH)4-, or Al(OH)63-

B. Ag+, Cu2+, Zn2+, Cd2+ complex with NH3; forms Ag(NH3)2+, Cu(NH3)42+, Zn(NH3)42+, Cd(NH3)42+

C. Same metallic ions may complex with CN-

bulletMany times, # ligands are twice the charge on the ion.
bulletExcess OH-, NH3, or CN- is your clue for complex formation.

D. Breakup complex with acid: metal ion released and H+ combines with ligand to form H2O, NH4+, or HCN.

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