Question

4.14 Which has the larger numerical value? (a) The $pK_a$ of a strong acid or the $pK_a$ of a weak acid (b) The $K_a$ of a strong acid or the $K_a$ of a weak acid 4.15 In each pair, select the stronger acid. (a) Pyruvic acid ($pK_a$ 2.49) or lactic acid ($pK_a$ 3.08) (b) Citric acid ($pK_a$ 3.08) or phosphoric acid ($pK_a$ 2.10) 4.16 Arrange the compounds in each set in order of increasing acid strength. Consult Table 4.1 for $pK_a$ values of each acid. (a) $CH_3CH_2OH$ $HOCO^-$ $C_6H_5COH$ Ethanol Bicarbonate ion Benzoic acid (b) $HOCOH$ $CH_3COH$ $HCl$ Carbonic acid Acetic acid Hydrogen chloride 4.17 Arrange the compounds in each set in order of increasing base strength. Consult Table 4.1 for $pK_a$ values of the conjugate acid of each base. (a) $NH_3$ $HOCO^-$ $CH_3CH_2O^-$ (b) $OH^-$ $HOCO^-$ $CH_3CO^-$ (c) $H_2O$ $NH_3$ $CH_3CO^-$ (d) $NH_2^-$ $CH_3CO^-$ $OH^-$

          4.14 Which has the larger numerical value?
(a) The $pK_a$ of a strong acid or the $pK_a$ of a weak acid
(b) The $K_a$ of a strong acid or the $K_a$ of a weak acid
4.15 In each pair, select the stronger acid.
(a) Pyruvic acid ($pK_a$ 2.49) or lactic acid ($pK_a$ 3.08)
(b) Citric acid ($pK_a$ 3.08) or phosphoric acid ($pK_a$ 2.10)
4.16 Arrange the compounds in each set in order of increasing acid strength. Consult
Table 4.1 for $pK_a$ values of each acid.
(a) $CH_3CH_2OH$  $HOCO^-$  $C_6H_5COH$
Ethanol   Bicarbonate ion   Benzoic acid
(b) $HOCOH$  $CH_3COH$  $HCl$
Carbonic acid Acetic acid Hydrogen chloride
4.17 Arrange the compounds in each set in order of increasing base strength. Consult
Table 4.1 for $pK_a$ values of the conjugate acid of each base.
(a) $NH_3$  $HOCO^-$  $CH_3CH_2O^-$ 
(b) $OH^-$  $HOCO^-$  $CH_3CO^-$ 
(c) $H_2O$  $NH_3$  $CH_3CO^-$ 
(d) $NH_2^-$  $CH_3CO^-$  $OH^-$

4.14 Which has the larger numerical value?
(a) The pKa of a strong acid or the pKa of a weak acid
(b) The Ka of a strong acid or the Ka of a weak acid
4.15 In each pair, select the stronger acid.
(a) Pyruvic acid (pKa 2.49) or lactic acid (pKa 3.08)
(b) Citric acid (pKa 3.08) or phosphoric acid (pKa 2.10)
4.16 Arrange the compounds in each set in order of increasing acid strength. Consult
Table 4.1 for pKa values of each acid.
(a) CH3CH2OH HOCO^- C6H5COH
Ethanol Bicarbonate ion Benzoic acid
(b) HOCOH CH3COH HCl
Carbonic acid Acetic acid Hydrogen chloride
4.17 Arrange the compounds in each set in order of increasing base strength. Consult
Table 4.1 for pKa values of the conjugate acid of each base.
(a) NH3 HOCO^- CH3CH2O^-
(b) OH^- HOCO^- CH3CO^-
(c) H2O NH3 CH3CO^-
(d) NH2^- CH3CO^- OH^-

Added by Michael H.

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