chem 212 strengths of acids and bases notes

chem 212 strengths of acids and bases notes - LiOH KOH RbOH...

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Unformatted text preview: LiOH KOH RbOH Ca 0H 2 Sr 0H 2 Barium H droxide Ba OH 2 9.4 Strengths of Acids and Bases A. Strong Acids and Strong Bases: dissociate completely and irreversibly 1) StrOng Acids: HBr (aq) ——’\-\\‘K0l0,bi AF XIX '— (.Wbi “(am—ngma '\‘ Silg‘amct) 2) Strong Bases Na0H(aq) ——> MA“ \0\_°5\ Jr 03H” Kact) _ Pl "" B. Weak Acids dissociate partially and reversibly. HCN(aq) 2:2 animal if my ,1 ’ H3PO4 (aq) 4_..--—>_..__ Hi UM) .5. him— l C. Weak Bases accept H” partially and reversibly. NH3(aq) + H'+(aq) .2» i-léép" 4' 9.5 Ions of Water - Water is iii . . i ; it can act as an acid or as a base. - Water can undergo an iii ‘ with itself: H200) + H200) 4=’H30+(aq) + 0H“(aq) - The concentration of these ions is 5mg. :1 , given by the equation: h s ; er _ + - 77- Kw— [H3O ] x {OH ]- 16AM} “mm: - Brackets, [ ], indicate “manly . Units are usually omitted. - Experimentally, Kw is found to be \3 (which we will use as an e Mi} (1 in“: a ). J34 __r_H :1 w: A I‘\—~ \M m 7&9) .g : /_ - This is Mathematical relationship for ALL aqueous solutions (an die £2: 39969.: ) ...
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