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Zinc Ion

Complete the ...

Question

Complete the following reactions:
${ZnSO}_{4} (aq) + 2 NaOH (aq) \to$ $+ Zn (OH)_{2} (ppt .)$
${ZnSO}_{4} (aq) + 2 {NH}_{4} OH (aq) \to ({NH}_{4})_{2} {SO}_{4} (aq)$ +

A

N a_{2} S O_{4}

(aq)

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B

N a S O_{4}

(aq)

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C

Z n (O H)_{2}

(ppt.)

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D

Z n O

(ppt.)

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Solution

The correct options are
A $N a_{2} S O_{4}$ (aq)
C $Z n (O H)_{2}$ (ppt.)
In qualitative analysis, identification for most of the cations is commonly done by using two water soluble bases (alkalis), i.e. $N a O H$ and $N H_{4} O H$ .
$Z n S O_{4} (a q) + 2 N a O H (a q) \to N a_{2} S O_{4} (a q) + Z n (O H)_{2} (p p t .)$
$Z n S O_{4} (a q) + 2 N H_{4} O H (a q) \to (N H_{4})_{2} S O_{4} (a q) + Z n (O H)_{2} (p p t .)$

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Similar questions

Q. Complete the following reaction:

2 NaOH (aq) + H_{2} {SO}_{4} (aq) \to

Q. Complete the following reaction:

2 NaOH (aq) + H_{2} {SO}_{4} (aq) \to

Complete the following reaction:

H N O_{3} + Z n (O H)_{2} \to

Q. Which two sets of reactants best represent the amphoteric character of

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

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

{O H}^{-} (a q)

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

H_{2} O (l)

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

H^{+} (a q)

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

{N H}_{3} (a q)

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

is an amphoteric hydroxide which is involved in the following two equilibria existing simultaneously in aqueous solution.

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

the solubility of

Z n (O H)_{2}

will be minimum?

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