Acid Dissociation + H 1 - HCl Cl Acid Conjugate base Conjugate pair Kelter, Carr, Scott, Chemistry A World of Choices 1999, page 280
Conjugate Acid-Base Pairs conjugates HCl + base acid H 2 O H 3 O + + acid Clbase conjugates HCl acid + H 2 O H 3 O + base CA + Cl. CB
Conjugate Acid-Base Pairs conjugates acid NH 3 + H 2 O base NH 41+ + OH- acid conjugates NH 3 base + H 2 O acid NH 41+ CA + OHCB
Water is Amphoteric or Amphiprotic substances: substances Substances which can act as either proton donors (acids) or proton acceptors (bases) depending on what substances are present. HCl + acid NH 3 base + H 2 O H 3 O + base CA H 2 O acid NH 41+ CA + Cl. CB + OHCB
Amphoteric A substance that can act as either an acid or a base. 11+ + H 3 O + hydronium ion + HSO 4 hydrogen sulfate ion 1 - H 2 O water H 2 SO 4 sulfuric acid 2 - 1 - + HSO 4 hydrogen sulfate ion OHhydroxide ion + SO 42 - H 2 O sulfate ion water
Amphoteric A substance that can act as either an acid or a base. 11+ + H 3 O + hydronium ion + HSO 4 hydrogen sulfate ion (HSO 4 - as a base) H 2 SO 4 sulfuric acid H 2 O water
Amphoteric A substance that can act as either an acid or a base. 1 - 21 - + + HSO 4 - OH- SO 42 - H 2 O hydrogen sulfate ion hydroxide ion sulfate ion water (HSO 4 - as an acid)
Conjugate Acid-Base Pairs conjugates base 2 HC 2 H 3 O 2 + H 2 O acid 2 H 3 O 1+ + acid 1 C 2 H 3 O 2 OHbase 1 conjugates HC 2 H 3 O 2 + H 2 O acid base H 3 O 1+ CA + C 2 H 3 O 2 OHCB The reaction proceeds in the direction such that the stronger acid donates its proton to the stronger base.