Which two sets of reactants best represent the amphoteric nature of $Zn (OH)_{2}$ ?
Set $1 : Zn (OH)_{2} (s)$ and $OH^{-} (aq)$
Set 2 : $Zn (OH)_{2} (s)$ and $H_{2} O (l)$
Set $3 : Zn (OH)_{2} (s)$ and $H^{+} (aq)$
Set $4 : Zn (OH)_{2} (s)$ and $NH_{3} (aq)$

Question

Which two sets of reactants best represent the amphoteric nature of $Zn (OH)_{2}$ ?

Set $1 : Zn (OH)_{2} (s)$ and $OH^{-} (aq)$

Set 2 : $Zn (OH)_{2} (s)$ and $H_{2} O (l)$

Set $3 : Zn (OH)_{2} (s)$ and $H^{+} (aq)$

Set $4 : Zn (OH)_{2} (s)$ and $NH_{3} (aq)$

TestHub · Accepted Answer

\eqalign{ & Zn(OH){\,_2} + \,\,2O{H^ - } 	o ZnO_2^{2 - } + 2{H_2}O \cr & \,\,\,Acid\,\,\,\,\,\,\,\,\,\,\,\,Base\,\,\,\,\,\,\,\,\,\,\,\,salt\,\,\,\,\,\,\,\,\,\,\,Water \cr & Zn{(OH)_2} + \,\,2{H^ + } 	o \,\,\,\,Z{n^{ + + }}\,\,\,\,\,\,\, + \,\,2{H_2}O \cr & \,\,\,\,\,\,\,\,Base\,\,\,\,\,\,\,\,Acid\,\,\,\,\,\,\,\,\,Salt\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Water \cr}

Chemistry - Salt Analysis Question with Solution | TestHub

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