| AQUA | Mixture of nitric acid and hydrochloric acid (4,5) |
| REGIA | Mixture of nitric acid and hydrochloric acid (4,5) |
| AQUAREGIA | Yellow corrosive mixture of nitric and hydrochloric acid used to dissolve metals |
| NITRATE | Any salt or ester of nitric acid, including saltpetre, guncotton etc. (7) |
| NITRATES | What do we call salts or esters of nitric acid (8) |
| INTRINSIC | Natural sin with nitric acid (9) |
| AMMONIA | Colourless pungent gas composed of one atom of nitrogen bonded to three atoms of hydrogen, chiefly used in the manufacture of fertilisers and nitric acid (7) |
| ACIDRAIN | Precipitation which contains high levels of nitric and sulphuric acid (4,4) |
| CHLORIDE | Any salt of hydrochloric acid (8) |
| MURIATIC | ___ acid (old name for hydrochloric acid) |
| NITRIC | ___ acid (compound that mixes with hydrochloric acid to form aqua regia) |
| IONS | Hydrochloric acid, when added to water |
| HCL | What is the formula for hydrochloric acid? (1,1,1) |
| INFER | Reason big fire stops short of nitric oxide (5) |
| ACIDS | Sulphuric and hydrochloric |
| JUICE | Thin clear fluid secreted by the stomach to aid digestion, containing hydrochloric acid, pepsin etc. (5) |
| AQUAFORTIS | Water on top of castle is nitric acid! (10) |
| AQUATINT | Invented by Jean-Baptiste Le Prince, a tonal method of printmaking made by etching a copper plate with nitric acid (8) |
| FORTIS | see 22dn, Obsolete name for nitric acid (4,6) |
| ASIMOV | see 22dn, Obsolete name for nitric acid (4,6) |
