b. Types of Salts. There are four types of reactions possible between acids
and bases as we classified them (strong or weak) earlier. These are as follows:
Relative strength of common acids and bases
HC2H3O2 (HAC) Acetic acid
* Ca(OH) 2
* Notice that Ca(OH) 2, Mg(OH) 2, and MgO which forms Mg(OH) 2 in water are
chemically classified as strong bases because of their high degree of dissociation.
Because they are only slightly soluble in water, they produce low concentrations of
the hydroxide (OH-) ion in solution. Since calcium hydroxide and magnesium
hydroxide do not produce tissue damage, they can be safely used as therapeutic
agents (e.g., antacids).
Table 2-1. Relative strength of common acids and bases.
Strong acid and strong base.
HCl+ NaOH ---> NaCl + H2O
Weak acid and weak base.
2H2CO3 + Fe(OH)2 ---> Fe(HCO3)2 + 2H2O
Strong acid and weak base.
2HCl + Fe(OH)2 -----> FeCl2 + 2H2O