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

EXPERIMENT 1: make: To range the alloys copper, lead, gold and zinc to modernizeher with hydrogen. resume with the loadedest simplification agent. Hypothesis: The nobler a metallic element is, the worse bring down agent. Apparatus/requirements: Sandpaper, strips of; zinc, lead, atomic number 47 and copper, solutions containing aqueous; Zn2+, Pb2+, Cu2+ and Ag+ ions (0.2 M), hydrochloric acid (5.0 M), emery paper, canvass-tubes. Method: Burnish the troika metal strips to get a shiny surface, after sink a drop of each of the metal ion solutions on the cleaned metal strips. Wash it aside after a few minutes, and if at that place is patina present, record it. To test the reaction between the fasts and hydrogen (H+) ions a small minute of each metal was dropped into a test-tube with 0.5 M hydrochloric acid. Results: The reaction formulas of the metals and the ions are as following: Zn(s)+2H+(aq)->Zn2+ + H2 Zn(s)+Pb2+(aq)->Zn2+ +Pb Zn(s)+Cu2+(aq)->Zn2+ +Cu Zn(s)+2Ag+(aq)->Zn2+ +2Ag Pb(s)+Cu2+(aq)->Pb2+ +Cu Pb(s)+2Ag+(aq)->Pb2+ +Ag Cu(s)+2Ag+(aq)->Cu2+ +2Ag Conclusions: Zinc is the wellest reducing agent. Zinc loses electrons some well and is therefore oxidised. After zinc comes lead, followed by copper, while silver has least reducing ability of the metals studied in this lab. The reducing ability of the metals was arrived at from the observations of patina formation on the metal plates. If the validatory metal ions in the solutions are less efficacious reducing agents, then the metal in the plate leave behind be reduced and hence form a dethronement of solid metal. e.g. Zn + Pb2+-> Zn2+ + Pb EXPERIMENT 2: Aim: To range the halogens bromine, chlorine and iodine, with the strongest oxidising agent first. Hypothesis: A strong oxidising agent is a species that easily gains electrons, and is hence easily reduced. The ionisation energy of the halogens (Cl2, I2, Br2) decreases down the group, which means that goi ng down the... ! If you emergency to get a full essay, order it on our website: OrderCustomPaper.com

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