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Q. 4.4

Classifying Acids and Bases as Strong or Weak

Identify each of the following compounds as a strong or weak acid or base:

$a. LiOH b. HC_2H_3O_2 c. HBr d. HNO_2$

Verified Solution

Refer to Table 4.3 for the common strong acids and bases. You can assume that other acids and bases are weak.

a. As noted in Table 4.3, LiOH is a strong base.

b. Acetic acid, $HC_2H_3O_2$, is not one of the strong acids listed in Table 4.3; therefore, we assume $HC_2H_3O_2$ is a weak acid.

c. As noted in Table 4.3, HBr is a strong acid.

d. Nitrous acid, $HNO_2$, is not one of the strong acids listed in Table 4.3; therefore, we assume $HNO_2$ is a weak acid.

Table 4.3

 Common Strong Acids and Bases Strong Acids Strong Bases $HClO_4$ LiOH $H_2SO_4$ NaOH HI KOH HBr $Ca(OH)_2$ HCl $Sr(OH)_2$ $HNO_3$ $Ba(OH)_2$