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Acids and Bases: molecule Structure and Behavior
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HomeTable that Contents introduction Molecular structure Ionization Constants salts Buffers Lewis concept Conjugate Acid-Base Pairs below are some molecular depictions of assorted acids (the water molecules have been left out). Which ideal represents one aqueous equipment of hydrogen cyanate (HOCN, a weak acid)?
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You are watching: Which of the following is a conjugate acid/base pair

HOCN is a weak acid and also will partially ionize in aqueous solutions.
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Good! because HOCN is a weak acid, both HOCN and also OCN- will be in solution.
HOCN is a weak acid and will only partially ionize in aqueous solutions.


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The betterworld2016.orgistry equation representing the reactions occuring in a hydrogen cyanate solution is:
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The dual arrow in the above equation to represent an equilibrium. This method in the solution, both the forward and also backward reactions room occurring. The is necessary to realize the in this solution, reaction are always occuring; reactions carry out not stop after equilibrium is reached. Under the magnifying glass listed below you deserve to see a depiction of the molecules current in this solution.

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Click top top magnifying glass to view a reaction occur. Clicking again will show one more reaction.
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In this representation, you can observe the acidic nature that the HOCN molecule, that is you can see that donate a proton come water. The turning back reaction reflects the simple nature of the OCN- ion; you have the right to see it expropriate a proton native the hydronium ion. HOCN and OCN- are an instance of a conjugate acid-base pair. The just difference in between the two is a proton (H+).All acids have a conjugate base and also all bases have actually a conjugate acid. native the list of molecule/ion pairs below, click those that are conjugate acid-base pairs.
H3O+ / OH- NH4+ / NH3
OH- / O2- H2SO4 / SO42-
H2S / S2- HOBr / OBr-