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Potassium Dichromate

Al+3 /AI=1.66...

Question

Al+3 /AI=1.66 V and K of Al (OH)3=1.0 x 10-33. Reduction potential of the abovecouple at pH = 14 is(A) -2.31 V(C) +1.01 V(B) + 2.31 V (d) -1.01v

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C u^{2 +} 1 C u

K_{s p}

C u (O H)_{2} i s 1.0 \times 10^{- 19}

C u^{2 +} / C u

+ 0.34

= 14

K_{s p}

C u (O H)_{2}

1.0 \times 10^{- 19}]

E^{o}

A l^{3 +} / A l

T l^{3 +} / T l

- 1.66 V

+ 1.26 V

p H

1.0 \times 10^{- 3}

A l {(O H)}_{3}

1 L

{A l}^{3 +}

K_{s p} [A l {(O H)}_{3}] = 5.0 \times 10^{33}

[A l {(O H)}_{4}^{-}] \Leftrightarrow {A l}^{3 +} + 4 {O H}^{-}

K = 1.3 \times 10^{- 34}

C u^{2 +} / C u

0.34

25^{0}

p H = 14

K_{s p}

C u (O H)_{2} = 1.0 \times 10^{- 18}

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