Table 18.2 Ka Values for Some Monoprotic Acids at 25°C Name (Formula) Lewis Structure* к Iodic acid (HIO,) н-о—1—0 1.6X10-1 :0: Chlorous acid (HCi,) H-Ö-i-ö 1.12X10 Nitrous acid (HNO,) H-Ö-N=Ö 7.1X10+ Hydrofluoric acid (HF) H-E: 6.8X104 :O: Formic acid (HCOOH) н-с-о—н 1.8X10 4 :O: Benzoic acid (C,H,COOH) C-0-H 6.3x103 H :0: Acetic acid (CH,COOH) Н-С c-ö-H 1.8X103 Н н H :0: Propanoic acid (CH,CH,COOH) Н-с- C-0-H 1.3X10 Hypochlorous acid (HCIO) н-б-бн 2.9x10-* Hypobromous acid (HBRO) н-о— б 2.3x10- Hydrocyanic acid (HCN) 6.2x10-10 H-CEN: Phenol (C,H,OH) O-ö-H 1.0x10-10 Hypoiodous acid (HIO) н-б- 2.3X1011 "Red type indicates the ionizable proton; structures have zero formal charge. ACID STRENGTH

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(a) Use Table 18.a or Apendix C to calculate the pH of 0.111 M sodium phenolate, C6H5ONa, which is the sodium salt of phenol?

Table 18.2 Ka Values for Some Monoprotic Acids at 25°C
Name (Formula)
Lewis Structure*
к
Iodic acid (HIO,)
н-о—1—0
1.6X10-1
:0:
Chlorous acid (HCi,)
H-Ö-i-ö
1.12X10
Nitrous acid (HNO,)
H-Ö-N=Ö
7.1X10+
Hydrofluoric acid (HF)
H-E:
6.8X104
:O:
Formic acid (HCOOH)
н-с-о—н
1.8X10 4
:O:
Benzoic acid (C,H,COOH)
C-0-H
6.3x103
H :0:
Acetic acid (CH,COOH)
Н-С
c-ö-H
1.8X103
Н
н
H :0:
Propanoic acid (CH,CH,COOH)
Н-с-
C-0-H
1.3X10
Hypochlorous acid (HCIO)
н-б-бн
2.9x10-*
Hypobromous acid (HBRO)
н-о— б
2.3x10-
Hydrocyanic acid (HCN)
6.2x10-10
H-CEN:
Phenol (C,H,OH)
O-ö-H
1.0x10-10
Hypoiodous acid (HIO)
н-б-
2.3X1011
"Red type indicates the ionizable proton; structures have zero formal charge.
ACID STRENGTH
Transcribed Image Text:Table 18.2 Ka Values for Some Monoprotic Acids at 25°C Name (Formula) Lewis Structure* к Iodic acid (HIO,) н-о—1—0 1.6X10-1 :0: Chlorous acid (HCi,) H-Ö-i-ö 1.12X10 Nitrous acid (HNO,) H-Ö-N=Ö 7.1X10+ Hydrofluoric acid (HF) H-E: 6.8X104 :O: Formic acid (HCOOH) н-с-о—н 1.8X10 4 :O: Benzoic acid (C,H,COOH) C-0-H 6.3x103 H :0: Acetic acid (CH,COOH) Н-С c-ö-H 1.8X103 Н н H :0: Propanoic acid (CH,CH,COOH) Н-с- C-0-H 1.3X10 Hypochlorous acid (HCIO) н-б-бн 2.9x10-* Hypobromous acid (HBRO) н-о— б 2.3x10- Hydrocyanic acid (HCN) 6.2x10-10 H-CEN: Phenol (C,H,OH) O-ö-H 1.0x10-10 Hypoiodous acid (HIO) н-б- 2.3X1011 "Red type indicates the ionizable proton; structures have zero formal charge. ACID STRENGTH
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