Identifying Strong and Weak Electrolytes

If our substance is a base, we use Table 4.2 to determine whether it is a strong base. NH3 is the only molecular base that we consider in this chapter, and it is a weak base Table 4.3 tells us it is therefore a weak electrolyte. Finally, any molecular substance that we encounter in this chapter that is not an acid or NH3 is probably a nonelectrolyte. 

Molecular Strong acids (see Table 4.2) Weak acids, weak bases AU other compounds 

Classify these dissolved substances as a strong electrolyte, weak electrolyte, or nonelectrolyte CaCl2, HNO3, C2H5OH (ethanol), HCOOH (formic acid), KOH. 

Plan The approach we take is outlined in Table 4.3. We can predict whether a substance is ionic or molecular based on its composition. 

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