Giải
\(HClO \mathbin{\lower.3ex\hbox{$\buildrel\textstyle\rightarrow\over {\smash{\leftarrow}\vphantom{_{\vbox to.5ex{\vss}}}}$}} {H^ + } + ClO{^ - }\)
\({K_a} = {{\left[ {{H^ + }} \right]\left[ {Cl{O^ - }} \right]} \over {\left[ {HClO} \right]}}\)
\(Br{O^ - } + {H_2}O \mathbin{\lower.3ex\hbox{$\buildrel\textstyle\rightarrow\over {\smash{\leftarrow}\vphantom{_{\vbox to.5ex{\vss}}}}$}} HBrO + O{H^ - }\)
\({K_b} = {{\left[ {HBrO} \right]\left[ {O{H^ - }} \right]} \over {\left[ {Br{O^ - }} \right]}}\)
\(HN{O_2} \mathbin{\lower.3ex\hbox{$\buildrel\textstyle\rightarrow\over {\smash{\leftarrow}\vphantom{_{\vbox to.5ex{\vss}}}}$}} {H^ + } + NO_2^ - \)
\({K_a} = {{\left[ {{H^ + }} \right]\left[ {NO_2^ - } \right]} \over {\left[ {HN{O_2}} \right]}}\)
\(NO_2^ - + {H_2}O \mathbin{\lower.3ex\hbox{$\buildrel\textstyle\rightarrow\over {\smash{\leftarrow}\vphantom{_{\vbox to.5ex{\vss}}}}$}} HNO_2 + O{H^ - }\)
\({K_b} = {{\left[ {HN{O_2}} \right]\left[ {O{H^ - }} \right]} \over {\left[ {NO_2^ - } \right]}}\)
