Pka Values Of Phosphoric Acid

This is "Appendix C: Dissociation Constants and pKa Values for Acids at 25°C", appendix 3 from the book Principles of General Chemistry (v. 1.0). For details on it (including licensing), click here.

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Chapter 27 Appendix C: Dissociation Constants and pK _a Values for Acids at 25°C

Name	Formula	Chiliad a1	pGrand a1	1000 a2	pK a2	K a3	pK a3	K a4	pYard a4
Acetic acid	CH3CO2H	1.75 × x−5	4.756
Arsenic acrid	H3AsO4	5.5 × 10−3	2.26	1.7 × 10−7	half dozen.76	v.1 × x−12	11.29
Benzoic acid	C6HvCO2H	6.25 × 10−5	4.204
Boric acid	HthreeBO3	five.4 × 10−10*	nine.27*	>i × ten−fourteen*	>14*
Bromoacetic acid	CHtwoBrCOiiH	1.3 × x−iii	2.90
Carbonic acid	H2CO3	iv.5 × 10−7	6.35	4.seven × 10−eleven	10.33
Chloroacetic acid	CHtwoClCO2H	1.3 × 10−3	2.87
Chlorous acid	HClO2	ane.ane × 10−2	1.94
Chromic acid	H2CrOiv	1.eight × 10−1	0.74	3.ii × 10−7	half dozen.49
Citric acid	C6H8O7	seven.iv × ten−four	three.13	1.7 × 10−5	iv.76	4.0 × 10−seven	6.40
Cyanic acrid	HCNO	3.five × 10−iv	three.46
Dichloroacetic acid	CHCl2CO2H	4.v × 10−2	one.35
Fluoroacetic acid	CHtwoFCO2H	2.half dozen × ten−3	two.59
Formic acrid	CHiiO2	1.8 × ten−4	3.75
Hydrazoic acid	HNthree	2.5 × 10−v	iv.6
Hydrocyanic acrid	HCN	6.two × x−10	9.21
Hydrofluoric acid	HF	6.3 × 10−4	3.20
Hydrogen selenide	H2Se	1.3 × 10−4	3.89	1.0× 10−11	11.0
Hydrogen sulfide	H2S	eight.9 × ten−8	7.05	one × 10−xix	19
Hydrogen telluride	H2Te	2.v × x−iii‡	2.half dozen‡	ane × x−eleven	11
Hypobromous acid	HBrO	2.8 × 10−9	8.55
Hypochlorous acid	HClO	four.0 × 10−8	vii.forty
Hypoiodous acid	HIO	3.2 × 10−xi	10.5
Iodic acrid	HIOthree	1.7 × x−one	0.78
Iodoacetic acid	CH2ICOiiH	6.6 × ten−4	3.18
Nitrous acid	HNOii	5.6 × 10−four	iii.25
Oxalic acid	CtwoH2Ofour	5.6 × 10−two	ane.25	1.5 × 10−4	iii.81
Periodic acid	HIOiv	two.3 × 10−2	1.64
Phenol	C6HvOH	ane.0 × 10−10	9.99
Phosphoric acid	HiiiPO4	6.9 × ten−3	2.16	6.two × 10−8	7.21	four.8 × x−xiii	12.32
Phosphorous acid	H3PO3	5.0 × 10−2*	ane.3*	2.0 × 10−seven*	6.70*
Pyrophosphoric acrid	HfourPtwoO7	1.2 × x−one	0.91	seven.9 × x−three	2.10	2.0 × 10−7	half-dozen.70	iv.8 × 10−10	9.32
Resorcinol	CviH4(OH)2	4.8 × x−10	nine.32	vii.9 × ten−12	eleven.1
Selenic acrid	H2SeO4	Strong	Strong	2.0 × 10−2	i.7
Selenious acid	H2SeO3	2.four × ten−iii	ii.62	4.8 × x−ix	8.32
Sulfuric acrid	H2Sofour	Strong	Strong	i.0 × 10−2	1.99
Sulfurous acid	HtwoSo3	1.4 × 10−2	i.85	six.3 × ten−8	7.two
meso-Tartaric acrid	CivHhalf dozenOhalf dozen	6.eight × ten−four	3.17	1.ii × 10−5	four.91
Telluric acrid	HiiTeO4	2.i × ten−8‡	seven.68‡	1.0 × 10−xi‡	eleven.0‡
Tellurous acid	H2TeO3	v.iv × ten−7	6.27	3.7 × x−9	8.43
Trichloroacetic acid	CClthreeCO2H	2.two × 10−1	0.66
Trifluoroacetic acid	CF3CO2H	3.0 × 10−1	0.52
* Measured at 20°C, not 25°C.
‡ Measured at 18°C, not 25°C.

Source of data: CRC Handbook of Chemical science and Physics, 84th Edition (2004).

Pka Values Of Phosphoric Acid,

Source: https://2012books.lardbucket.org/books/principles-of-general-chemistry-v1.0/s31-appendix-c-dissociation-consta.html

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