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Monosaccharides

Calculate the...

Question

Calculate the equilibrium concentration of each of the indicated species necessary to reduce an inital 0.2 M $Z n^{2 +}$ solution to $1.0 \times 10^{- 4} Z n^{2 +}$ .
Explain what would be observed if concentrated $N H_{3}$ solution were added slowoly to 0.2 M solution of $Z n^{2 +}$ .
Given $K_{f} Z n (N H_{3})_{4}^{2 +} = 5 \times 10^{8}$
$K_{s p} Z n (O H)_{2} = 1.8 \times 10^{- 14}$
$K_{f} Z n (O H)_{4}^{2 -} = 5 \times 10^{14}$
$K_{b} N H_{4} O H = 1.8 \times 10^{- 5}$ .

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Solution

On addition of $N H_{3}$ solution to $Z n^{2 +}$ solution, a precipitate of $Z n (O H)_{2}$ will form, which will later dissolve to yield a clear solution containing $[Z n (N H_{3})_{4}]^{2 +}$

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Similar questions

Z n^{2 +}

1.0 \times 10^{- 4} Z n^{2 +}

⊝ O H

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

N H_{3}

Z n^{2 +}

1.0 \times 10^{- 4} Z n^{2 +}

K_{f}

Z n (N H_{3})_{4}^{2 +} = 5 \times 10^{8}

N H_{3}

Z n (N H_{3})_{4}^{2 +}

H^{+}

(K_{a} = 1.8 \times 10^{- 5}, K_{b} = 1.8 \times 10^{- 5}, K_{w} = 1.0 \times 10^{- 14})

H^{+}

(C H_{3} C O O H)

H C l

K_{a} = 1.8 \times 10^{- 5}

0.05 M M g^{2 +}

0.05 M N H_{3}

N H_{4} C l

M g (O H)_{2}

K_{s p} of M g (O H)_{2} = 9.0 \times 10^{- 12}

N H_{3} = 1.8 \times 10^{- 5}

\sqrt{1.8} = 1.34

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