16.6 Acidity and Basicity of Salts
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| NEGLIGIBLE CATIONS | NEGLIGIBLE ANIONS |
|---|---|
| Group 1 metal ions (Li+, Na+, K+, Rb+, Cs+)Group 2 metal ions (Mg2+, Ca2+, Sr2+, Ba2+)Transition metals with +1 charge (such as Ag+) | Conjugate bases of strong acids(Cl-, Br-, I-, NO3-, ClO4-, ClO3-) |
| ALL OTHER CATIONS ARE ACIDIC | ALMOST ALL OTHER ANIONS ARE BASIC |
| HSO4- is Acidic |
| CATION ACIDITY TRENDS |
|---|
| More + charged ➔ more acidic (Fe3+ > Fe2+) |
| Smaller cations ➔ more acidic (Fe2+ > Ru2+) |
Identify the following as Acidic, Basic, or Neutral
NaCl
BaF2
Al(ClO4)3
Mg(OH)2
NH4CN
pH Calculations with Salts
What is the pH of 0.1M NaF? (Ka, HF = 6.8×10-4)
What is the pH of 0.1M NH4Cl? (Kb, NH3 = 1.75×10-5)