Is CO2 an acid or a base? Organic Chemistry Acids and Bases Main Characterstics or Lewis/Bronsted Definition 1 Answer Dr. Hayek Nov 15, 2015 See explanation. Explanation: Acids have the general formula #H_xA# which means that they have to possess one hydrogen atom at least, which is not the case of carbon dioxide #CO_2#. However, #CO_2# when it dissolved in water it forms the carbonic acid: #CO_2(g) + H_2O(l)rightleftharpoonsH_2CO_3(aq)# Answer link Related questions How can I complete the following equation: #CH_3CH_2NH-CH_3 + HBr ->?# Which definition for acids and bases is the right one: Lewis or Brønsted? How does Lewis define acids and bases? What definition of acids and bases emphasizes the role of protons? How are acids and bases defined by Brønsted theory? How did Lewis create his acids and bases model? What are the differences between Brønsted–Lowry model and the Lewis model for acids and bases? How is #H^+# acting in the reaction #H^++:NH_3 ->[H:NH_3]^+#according to the Lewis definition? How is #NH_3 # acting in the reaction #H^++:NH_3 ->[H:NH_3]^+#according to the Lewis definition? Which pair is a Brønsted–Lowry conjugate acid–base pair? #NH_3 ; NH_4^+# or #H_3O^+ ; OH^-#... See all questions in Main Characterstics or Lewis/Bronsted Definition Impact of this question 20346 views around the world You can reuse this answer Creative Commons License