Find the number of amphoteric hydroxide-s- from the nbsp-following nbsp- Be-OH-2- Mg-OH-2 - Al-OH-2- LiOH- B-OH-3 -Zn-OH-2-

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Question

Find the number of amphoteric hydroxide(s) from the following :
$B e (O H)_{2}, M g (O H)_{2}, A l (O H)_{2}, L i O H, B (O H)_{3}, Z n (O H)_{2}$

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B e (O H)_{2}, M g (O H)_{2}, A l (O H)_{3}, L i O H, B (O H)_{3},

B e (O H)_{2}, M g (O H)_{2}, A l (O H)_{3}

B (O H)_{3}

B (O H)_{3}, M g (O H)_{2}, S i (O H)_{4}, S O_{2} (O H)_{2}, B a (O H)_{2}

H_{2} O ?

(1) B e S O_{4} > M g S O_{4} > C a S O_{4} > B a S O_{4}

(2) B e (O H)_{2} > M g (O H)_{2} > C a (O H)_{2} > B a (O H)_{2}

(3) L i O H < N a O H < K O H < R b O H

(4) L i_{2} C O_{3} < N a_{2} C O_{3} < K_{2} C O_{3} < R b_{2} C O_{3}

Z n {(O H)}_{2}

Z n {(O H)}_{2} (s) ⇌ {Z n}^{2 +} (a q) + 2 {O H}^{-} (a q)

K_{s p} = 1.2 \times 10^{- 17}

Z n {(O H)}_{2} (s) + 2 {O H}^{-} (a q) ⇌ {[Z n ({O H)}_{4}]}^{2 -} (a q)

K_{c} = 0.12

p H

Z n (O H)_{2}

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