Problem: Relative strengths of select conjugate acid-base pairs. The two members of each pair are listed opposite each other in the two columns.If ions O2- are added to water, what reaction, if any, occurs?

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We’re being asked to determine the reaction that occurs if O2- ions are added to water, H2O.


Let’s first define a Bronsted-Lowry Acid and a Bronsted-Lowry Base to determine the reaction that occurs:


Bronsted-Lowry acid proton (H+) donor

Bronsted-Lowry base proton (H+) acceptor


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Problem Details


Acid strength increases moving down the table, while base strength increases moving up the table.  Strong acids include HCl, H2SO4, HNO3, and H3O+ (aqueous).  Weak acids include HSO_4^-, H3PO4, HF, CH3COOH, H2CO3, H2S, H2PO_4^-, NH_4^+, HCO_3^-, HPO_4^2- and H2O.  Negligibly acidic species include OH-, H2, and CH4. Strong bases include O_2^-, H-, and CH_3^-.  Weak bases include SO_4^2-, H_2PO_4^-, F-, CH3COO-, HCO_3^-, HS^-, HPO4^2-, NH_3, CO_3^2-, PO_4^3-, and OH-.  Negligibly basic species H2O, NO3^-, HSO_4^-, and Cl^-.


Relative strengths of select conjugate acid-base pairs. The two members of each pair are listed opposite each other in the two columns.


If ions O2- are added to water, what reaction, if any, occurs?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Conjugate Acids and Bases concept. If you need more Conjugate Acids and Bases practice, you can also practice Conjugate Acids and Bases practice problems.

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Based on our data, we think this problem is relevant for Professor Alexander's class at KSU.