CHEM GEMS: Redox Andy Cherkas Stouffville DSS 801 Hoover Park Drive

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Presentation transcript:

CHEM GEMS: Redox Andy Cherkas Stouffville DSS 801 Hoover Park Drive Stouffville ON Canada L4A 0A4 andrew.cherkas@yrdsb.edu.on.ca

Visible Dissolution of a Copper Anode During Electrolysis Cu (s)  Cu+2 (aq) + 2 e- Copper- citrate complex shows blue colour of dissolved copper ions. [Benedict’s Solution for reducing sugar test.]

Can Rip 3 Cu+2 (aq) + 2 Al (s)  3 Cu (s) + 2 Al+3 (aq) chloride or bromide present to penetrate the Al2O3 protective coating on the aluminium.

Separation of Reactants: Electrochemical Cell Cu+2 (aq) + 2 e-  Cu (s) Zn (s)  Zn+2 (aq) + 2 e-

Reversible Reaction? Peroxide as an Oxidizing Agent or Reducing Agent Acidic Solution 8 H+ (aq) + 3 H2O2 (aq) + Cr2O7-2 (aq)  2 Cr+3 (aq) + 3 O2 (g) + 7 H2O (l) Basic Solution 8 OH- (aq) + 3 H2O2 (aq) + 2 Cr+3 (aq)  Cr2O7-2 (aq) + 7 H2O (l)