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, gilt and zinc to modernizeher with hydrogen. resume with the loadedest reducing cistron. Hypothesis: The nobler a surface 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 triple metal strips to spoil a shiny surface, later on throw away a drop of separately of the metal ion solutions on the cleaned metal strips. Wash it aside after a few minutes, and if in that respect is patina present, record it. To test the answer between the fasts and hydrogen (H+) ions a small minute of apiece 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 strongest reducing agent. Zinc loses electrons most well and is and thusly oxidised. After zinc comes lead, followed by copper, while silver has least reducing big businessman of the metals analyze in this lab. The reducing ability of the metals was arrived at from the observations of patina formation on the metal graduated tables.

If the validatory metal ions in the solutions are less(prenominal) powerful reducing agents, then the metal in the plate will be decreased and thence form a deposition 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 ionization slide fastener of the halogens (Cl2, I2, Br2) decreases down the group, which means that waiver down the... If you fatality to get a full essay, tack together it on our website: Ordercustompaper.com

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