H | Jónunarfastar daufra sýra

Sýra	Formúla	K a við 25 °C
edikssýra	CH 3 CO 2 H	1.8 × × 10 −5
arsensýra	H 3 AsO 4	5.5 × × 10 −3
	1.7 × × 10 −7
	3.0 × × 10 −12
arsensýrlingur	H 3 AsO 3	5.1 × × 10 −10
bórsýra	H 3 BO 3	5.4 × × 10 −10
kolsýra	H 2 CO 3	4.3 × × 10 −7
	4.7 × × 10 −11
maurasýra	HCO 2 H	1.8 × × 10 −4
asíðsýra	H N 3	2.5 × × 10 −5
blásýra	H CN	4.9 × × 10 −10
vetnisflúorsýra	H F	6.4 × × 10 −4
vetnisperoxíð	H 2 O 2	2.4 × × 10 −12
vetnisseleníð	H 2 Se	1.29 × × 10 −4
H Se –	1 × × 10 −12
vetnissúlfatjón		1.2 × × 10 −2
vetnissúlfíð	H 2 S	8.9 × × 10 −8
H S –	1.0 × × 10 −19
vetnistellúríð	H 2 Te	2.3 × × 10 −3
H Te –	1.6 × × 10 −11
undirbrómsýra	H BrO	2.8 × × 10 −9
undirklórsýra	H ClO	2.9 × × 10 −8
ísósýansýra	H CNO	2 × × 10 −4
nítrítsýra	H NO 2	4.6 × × 10 −4
oxalsýra	H 2 C 2 O 4	6.0 × × 10 −2
	6.1 × × 10 −5
fosfórsýra	H 3 PO 4	7.5 × × 10 −3
	6.2 × × 10 −8
	4.2 × × 10 −13
fosfórsýrlingur	H 3 PO 3	5 × × 10 −2
	2.0 × × 10 −7
brennisteinssýrlingur	H 2 SO 3	1.6 × × 10 −2
	6.4 × × 10 −8