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andselisk ♦
andselisk ♦
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Why transition metal chloride complex have lower reduction potential than metal aqua ions? For example:

i.e.:$$ \begin{align} \ce{Au^3+(aq) + 3 e- &-> Au(s)} &\quad E^\circ &= \pu{+1.52 V}\tag{1}\\ \ce{[AuCl4]-(aq) + 3 e- &-> Au(s) + 4 Cl-} &\quad E^\circ &= \pu{+0.93 V}\tag{2} \end{align} $$

  • $\ce{Au^3+(aq) + 3e- -> Au(s)}$ $\mathrm{\,\,\,\,\,E^\circ} = +\pu{1.52 V}$
  • $\ce{[AuCl4]-(aq) + 3e- -> Au(s) + 4Cl-}$ $\mathrm{\,\,\,\,\,E^\circ} = +\pu{0.93 V}$

Is it because the chloride complex formation constant is very high (higher than aqua ions) so the reduction of $\ce{Au}$$\ce{Au^3+}$ is less favouritedfavored?

Why transition metal chloride complex have lower reduction potential than metal aqua ions?

i.e.:

  • $\ce{Au^3+(aq) + 3e- -> Au(s)}$ $\mathrm{\,\,\,\,\,E^\circ} = +\pu{1.52 V}$
  • $\ce{[AuCl4]-(aq) + 3e- -> Au(s) + 4Cl-}$ $\mathrm{\,\,\,\,\,E^\circ} = +\pu{0.93 V}$

Is it because the chloride complex formation constant is very high (higher than aqua ions) so the reduction of $\ce{Au}$ is less favourited?

Why transition metal chloride complex have lower reduction potential than metal aqua ions? For example:

$$ \begin{align} \ce{Au^3+(aq) + 3 e- &-> Au(s)} &\quad E^\circ &= \pu{+1.52 V}\tag{1}\\ \ce{[AuCl4]-(aq) + 3 e- &-> Au(s) + 4 Cl-} &\quad E^\circ &= \pu{+0.93 V}\tag{2} \end{align} $$

Is it because the chloride complex formation constant is very high (higher than aqua ions) so the reduction of $\ce{Au^3+}$ is less favored?

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Mathew Mahindaratne
Mathew Mahindaratne
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Why transition metal chloride complex have lower reduction potential than metal aqua ions?

i.e.:

  • $\ce{Au^3+(aq) + 3e- -> Au(s)}$ $\mathrm{\,\,\,\,\,E°= +1.52V}$$\mathrm{\,\,\,\,\,E^\circ} = +\pu{1.52 V}$
  • $\ce{AuCl4-(aq) + 3e- -> Au(s) + 4Cl-}$$\ce{[AuCl4]-(aq) + 3e- -> Au(s) + 4Cl-}$ $\mathrm{\,\,\,\,\,E°= +0.93V}$$\mathrm{\,\,\,\,\,E^\circ} = +\pu{0.93 V}$

Is it because the chloride complex formation constant is very high (higher than aqua ions'ions) so the reduction of Au$\ce{Au}$ is less favourited?

Why transition metal chloride complex have lower reduction potential than metal aqua ions?

i.e.:

  • $\ce{Au^3+(aq) + 3e- -> Au(s)}$ $\mathrm{\,\,\,\,\,E°= +1.52V}$
  • $\ce{AuCl4-(aq) + 3e- -> Au(s) + 4Cl-}$ $\mathrm{\,\,\,\,\,E°= +0.93V}$

Is it because the chloride complex formation constant is very high (higher than aqua ions') so the reduction of Au is less favourited?

Why transition metal chloride complex have lower reduction potential than metal aqua ions?

i.e.:

  • $\ce{Au^3+(aq) + 3e- -> Au(s)}$ $\mathrm{\,\,\,\,\,E^\circ} = +\pu{1.52 V}$
  • $\ce{[AuCl4]-(aq) + 3e- -> Au(s) + 4Cl-}$ $\mathrm{\,\,\,\,\,E^\circ} = +\pu{0.93 V}$

Is it because the chloride complex formation constant is very high (higher than aqua ions) so the reduction of $\ce{Au}$ is less favourited?

corrected formatting
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S R Maiti
S R Maiti
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Why transition metal chloride complex have lower reduction potential than metal aqua ions?

i.e.:

  • Au3+(aq) + 3e- --> Au(s) E°= +1,52V$\ce{Au^3+(aq) + 3e- -> Au(s)}$ $\mathrm{\,\,\,\,\,E°= +1.52V}$
  • AuCl4-(aq) + 3e-$\ce{AuCl4-(aq) + 3e- -> Au(s) + 4Cl-}$ --> Au(s) + 4Cl- E°= +0,93V$\mathrm{\,\,\,\,\,E°= +0.93V}$

Is it because the chloride complex formation constant is very high (higher than aqua ions') so the reduction of Au is less favourited?

Why transition metal chloride complex have lower reduction potential than metal aqua ions?

i.e.:

  • Au3+(aq) + 3e- --> Au(s) E°= +1,52V
  • AuCl4-(aq) + 3e- --> Au(s) + 4Cl- E°= +0,93V

Is it because the chloride complex formation constant is very high (higher than aqua ions') so the reduction of Au is less favourited?

Why transition metal chloride complex have lower reduction potential than metal aqua ions?

i.e.:

  • $\ce{Au^3+(aq) + 3e- -> Au(s)}$ $\mathrm{\,\,\,\,\,E°= +1.52V}$
  • $\ce{AuCl4-(aq) + 3e- -> Au(s) + 4Cl-}$ $\mathrm{\,\,\,\,\,E°= +0.93V}$

Is it because the chloride complex formation constant is very high (higher than aqua ions') so the reduction of Au is less favourited?

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Alessia
Alessia
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