The balanced net ionic equation for the reaction of aluminum sulfate and sodium hydroxide contains which of the following terms?

A l^{3 +}

(aq)

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O H^{-}

(aq)

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O H^{-}

(aq)

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A l^{3 +}

(aq)

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A l (O H)_{3}

(s)

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Solution

The correct option is D 3 $O H^{-}$ (aq)
The unbalanced molecular equation is:
$A l_{2} (S O_{4})_{3} + N a O H \to A l (O H)_{3} ↓ + N a_{2} S O_{4}$
The unbalanced complete ionic equation is
$A l^{3 +} + S O_{4}^{2 -} + N a^{+} + O H^{-} \to A l (O H)_{3} ↓ + N a^{+} + S O_{4}^{2 -}$
The balanced net ionic equation is
$A l^{3 +} + 3 O H^{-} \to A l (O H)_{3} ↓$
The balanced net ionic equation for the reaction of aluminum sulfate and sodium hydroxide contains term 3 $O H^{-}$

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S_{4} O_{6}^{2 -} (a q) + A l (s) \to H_{2} S (a q) + A l^{3 +} (a q)

M n (O H)_{2} (s) + M n O_{4}^{-} (a q) \to M n O_{2} (s)

A l (O H)_{3}

A l (O H)_{3} (s) ⇌ A l^{3 +} (a q .) + 3 O H^{-} (a q .); K_{s p}

A l (O H)_{3} (s) + O H^{-} (a q) ⇌ A l (O H)_{4}^{-} (a q .); K_{c}

A l (O H)_{3}

A l (O H)_{3} (s) ⇌ A l^{3 +} (a q .) + 3 O H^{-} (a q .); K_{s p}

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S_{2} O {_{6}}^{2 -} (a q) + C r_{2} O {_{7}}^{2 -} (a q) \to S_{4} O {_{6}}^{2 -} (a q) + C r^{3 +} (a q)

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