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The pKa for the hydrogen sulfite ion, HSO3–, is 7.20. This pKa refers to which of the following reactions? H2SO3(aq) + H2O(l) ⇌ HSO3–(aq) + H3O+(aq) HSO3–(aq) + OH–(aq) ⇌ SO32–(aq) + H2O
The pKa for the hydrogen sulfite ion, HSO3–, is 7.20. This pKa refers to which of the following reactions? H2SO3(aq) + H2O(l) ⇌ HSO3–(aq) + H3O+(aq) HSO3–(aq) + OH–(aq) ⇌ SO32–(aq) + H2O
Final answer:ThepKavalue of 7.20 for the hydrogen sulfite ion refers to thereactionwhere thehydrogen sulfite ionreacts with a hydroxide ion to produce a sulfite ion and water. The pKa measures the strength of an acid in solution.Explanation:The pKavalueof 7.20 for the hydrogen sulfite ion (HSO3-) corresponds to the reaction HSO3–(aq) + OH–(aq) ⇌ SO32–(aq) + H2O(l).This is because the pKa is ameasureof the strength of an acid in solution, and specifically in this case, it measures the extent to which the hydrogen sulfite ion gives up its proton (H+) to the hydroxide ion.Sulfurousacid, from which the hydrogen sulfite ion derives, is a moderately strong, diprotic acid.This means it can donate twoprotonsper molecule, and the dissociation happens in two stages: firstly forming the hydrogen sulfite ion (HSO3–), and secondly forming the sulfite ion (SO32-).Learn more about pKa and Reactions of Hydrogen Sulfite Ion here:brainly.com/question/17193270#SPJ11...