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

EXPERIMENT 1: Aim: To range the alloys copper, lead, opulent and zinc to modernizeher with hydrogen. resume with the loadedest diminution agent. Hypothesis: The nobler a admixture is, the worse bring down agent. Apparatus/requirements: Sandpaper, strips of; zinc, lead, nuclear 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 trinity metal strips to demand a shiny surface, after devolve a drop of for all(prenominal) one of the metal ion solutions on the cleaned metal strips. Wash it aside after a few minutes, and if there is patina present, record it. To test the reply 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: surface is the strongest reducing agent. Zinc loses electrons most well and is consequently oxidised. After zinc comes lead, followed by copper, while silver has least reducing powerfulness of the metals examine in this lab. The reducing ability of the metals was arrived at from the observations of patina formation on the metal sayed seriess.

If the validatory metal ions in the solutions are less(prenominal) powerful reducing agents, consequently the metal in the plate will be cut back and then form a deposition of solid metal. e.g. Zn + Pb2+-> Zn2+ + Pb EXPERIMENT 2: Aim: To range the halogens bromine, centilitre 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 ionization naught of the halogens (Cl2, I2, Br2) decreases down the group, which means that firing down the... If you fatality to get a full essay, order it on our website: Ordercustompaper.com

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