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A salt can be acidic, neutral, basic or amphoteric (from Greek: "amphoteroi" (ἀμφότεροι), meaning "both")

  • a. It is acidic when it has pH<7 in solution; eg. NH4Cl, (NH4+)aq is a weak acid

    (pH of 0.1 M ammonium solution is about 5.2).

  • b. A lot of salts are neutral. They have pH of (about) 7 when dissolved; eg. NaCl
  • c. You'll not be surprised that basic salts have pH>7; eg. Na(CH3COO) sodium acetate, CH3COO- is a weak base.
  • d. Even amphoteric is possible, but pH is more difficult to predict in general; eg. NH4(CH3COO)
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15y ago

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