 # Which of the following are Arrhenius acids? (a) H_{2}O, (b) Gregory Emery 2022-01-10 Answered
Which of the following are Arrhenius acids? $\left(a\right){H}_{2}O,\left(b\right)Ca{\left(OH\right)}_{2},\left(c\right){H}_{3}P{O}_{4},\left(d\right)HI$
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$a\right){H}_{2}O$
${H}_{2}O⇒{H}^{+}+O{H}^{t}$
${H}_{2}O$ can be both an Arrhenius acid and base. It`s self-ionization both H^+ and OH^- ions.
$b\right)Ca{\left(OH\right)}_{2}$
$Ca\left(OH{\right)}_{2}⇒C{a}^{2}+2O{H}^{t}$
$Ca{\left(OH\right)}_{2}$ is not an Arrhenius acid. It is n Arrahenius bases since it produced $O{H}^{-}ion$.
$c\right){H}_{3}P{O}_{4}$
${H}_{3}P{O}_{4}⇒{H}_{3}P{O}_{4}^{-}+{H}^{+}$
${H}_{3}P{O}_{4}$ is an Arrahenius acid because it produced ${H}^{+}$ ion.
$d\right)HI$
$HI⇒{H}^{+}+{I}^{t}$
$HI$ is an Arrhenius acid because it produced ${H}^{+}$ ion.
We get result where $a\right){H}_{2}O,c\right){H}_{3}P{O}_{4},4\right)HI$ are Arrhenius acids.