Redox Area Lab Report

Topics: Zinc, Solubility, Solubility equilibrium Pages: 4 (741 words) Published: November 4, 2012
Observation

Zinc Shot: Silver color, some pieces are shiny while the majority is dull. Tear shaped pieces (round at base with pointed top). No odor.

Zinc Granular: Silver in color, semi shiny, flaky appearance. No odor.

Zinc Sheet: Sheet of metal, flat pieces that are about 3 inches wide & 2 inches in length & 0.02 inches in height. Each piece has a dull side and a shiny side. Silver in color, the dull side has a darker shade of gray. No odor.

Zinc Powder: Gray very fine powder. No odor.

Potassium Iodide: Small white granular compound with visible crystalline structure. No odor present.

Zinc Mossy: Dull silver pieces with irregular shape. Some pieces are flatter then others. No odor detected.

Iodine and Water mixture: Crushed iodine still visible in water. Over color of mixture changed from clear to clear with orange amber hue.

Iodine and Mineral Oil: Crushed iodine slightly visible in oil. Dramatic change in color; oil changed from clear into rich purple.

Iodine and Alcohol: No visible pieces of Iodine present in solution. Change of color from clear to dark brown.

Potassium Solution and Iodine: Immediate reaction between the two components. Mixture changed from clear to dark brown. Iodine smell noticed.

Zinc and Water: No reaction observed. Zinc sinks to the bottom of test tube filled with water.

Zinc and HCl: Interaction between Zinc and HCl caused the once clear HCl to become white in color. Visible bubble can be observed around the Zinc metal.

Results

I2 + H2O
I2 + Alcohol
I2 + Min. Oil
I2+Potassium
Zn + H2O
Zn + HCl
Soluble

Y

Y

Slightly Soluble

Y

Y
Insoluble
Y

Y

Trial Number
Total (g) of Zn
Total Water Displacement(mL)
1
10.01
1.9
2
20.02
3
3
30.03
4.8
4
40.04
6

Focus Questions

1. The appearance and solubility compares well with the information presented from the CRC Handbook. Our test results shows that...
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