Question

question 273 chemical reactions
which species is the conjugate acid in this reaction system?

$$ h _ { 2 } b o _ { 3 } ^ { - } + h o c l ightarrow h _ { 3 } b o _ { 3 } + o c l ^ { - } $$

select one
$$ circ o c l ^ { - } $$
$$ circ h _ { 3 } b o _ { 3 } $$
$$ circ h o c l $$
$$ circ h _ { 2 } b o _ { 3 } ^ { - } $$

Explanation:

According to the Brønsted - Lowry acid - base theory, a conjugate acid is formed when a base accepts a proton (\(H^+\)). In the reaction \(H_2BO_3^-+HOCl
ightarrow H_3BO_3 + OCl^-\), \(H_2BO_3^-\) acts as a base and accepts a proton (\(H^+\)) from \(HOCl\) to form \(H_3BO_3\).

Answer:

\(H_3BO_3\)