Assertion: unpolluted rain | /r/MadeOf | other chemicals
Facets:
Source sentences:
text: Clean” or unpolluted rain has a slightly acidic pH of about 5.2, because carbon dioxide and water in the air react together to form carbonic acid, a weak acid (pH 5.6 in distilled water), but unpolluted rain also contains other chemicals.
text: Unpolluted rain can also contain other chemicals which affect its pH (acidity level).
text: Clean" or unpolluted rain has a slightly acidic pH of about 5.2, because carbon dioxide and water in the air react together to form carbonic acid, a weak acid (pH 5.6 in distilled water), but unpolluted rain also contains other chemicals.