| Compound |
|
pH |
| HCl (hydrochloric acid) |
|
1.1 |
| H2SO4
(sulfuric acid) |
|
1.2 |
| NaHSO4 (sodium
hydrogen sulfate) |
|
1.4 |
| H2SO3
(sulfurous acid) |
|
1.5 |
| H3PO4
(phosphoric acid) |
|
1.5 |
| HF (hydrofluoric acid) |
|
2.1 |
| CH3CO2H
(acetic acid) |
|
2.9 |
| H2CO3
(carbonic acid) |
|
3.8 (saturated solution) |
| H2S (hydrogen
sulfide) |
|
4.1 |
| NaH2PO4
(sodium dihydrogen phosphate) |
|
4.4 |
| NH4Cl (ammonium
chloride) |
|
4.6 |
| HCN (hydrocyanic acid) |
|
5.1 |
| Na2SO4
(sodium sulfate) |
|
6.1 |
| NaCl (sodium chloride) |
|
6.4 |
| NaCH3CO2
(sodium acetate) |
|
8.4 |
| NaHCO3 (sodium
bicarbonate) |
|
8.4 |
| Na2HPO4
(sodium hydrogen phosphate) |
|
9.3 |
| Na2SO3
(sodium sulfite) |
|
9.8 |
| NaCN (sodium cyanide) |
|
11.0 |
| NH3 (aqueous
ammonia) |
|
11.1 |
| Na2CO3
(sodium carbonate) |
|
11.6 |
| Na3PO4
(sodium phosphate) |
|
12.0 |
| NaOH (sodium hydroxide, lye) |
|
13.0 |