• Oxidation - Reduction. Range the metals copper, lead, silver and zinc together with hydrogen to find the strongest reducing agent.

     

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Publicēts: 11.09.2005.
Valoda: Angļu
Līmenis: Vidusskolas
Literatūras saraksts: Nav
Atsauces: Nav
  • Eseja 'Oxidation - Reduction. Range the metals copper, lead, silver and zinc together w', 1.
  • Eseja 'Oxidation - Reduction. Range the metals copper, lead, silver and zinc together w', 2.
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EXPERIMENT 1:
Aim:
To range the metals copper, lead, silver and zinc together with hydrogen. Start with the strongest reducing agent.
Hypothesis:
The nobler a metal is, the worse reducing agent.
Apparatus/requirements:
Sandpaper, strips of; zinc, lead, silver and copper, solutions containing aqueous; Zn2+, Pb2+, Cu2+ and Ag+ ions (0.2 M), hydrochloric acid (5.0 M), emery paper, test-tubes.
Method:
Burnish the three metal strips to get a shiny surface, after drop a drop of each of the metal ion solutions on the cleaned metal strips. Wash it off after a few minutes, and if there is patina…

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