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Electrical Conductivity Measurements on Cuprous Halides (CAT#: STEM-PPA-0029-WXH)

Introduction

Cuprous chloride is a whitish to grayish solid that occurs as the mineral nantokite. It is usually prepared by reduction of copper(II) chloride with metallic copper. The pure compound is stable in dry air. Moist air converts it to a greenish oxygenated compound, and upon exposure to light it is transformed into copper(II) chloride. It is insoluble in water but dissolves in concentrated hydrochloric acid or in ammonia because of the formation of complex ions. Cuprous chloride is used as a catalyst in a number of organic reactions, notably the synthesis of acrylonitrile from acetylene and hydrogen cyanide; as a decolourizing and desulfurizing agent for petroleum products; as a denitrating agent for cellulose; and as a condensing agent for soaps, fats, and oils.




Principle

Conductivity is the measure of the ability of any solution to pass an electrical current. Conductivity is usually affected by free ions which are dissolved in any solution. The ions can be chloride, sulfate, nitrate, phosphate, sodium, magnesium, iron, calcium, or aluminum.

Applications

• Natural Waters, Aquaculture and Environmental Applications
• Water Treatment and Industrial Applications
• Agricultural and Hydroponics Applications

Procedure

1. Use a conductivity standard solution (usually potassium chloride or sodium chloride) to calibrate the meter for the range that you will be measuring.
2. Rinse the probe with distilled or deionized water.
3. Select the appropriate range beginning with the highest range and working down. Read the conductivity of the water sample. If the reading is in the lower 10 percent of the range, switch to the next lower range. If the conductivity of the sample ex ceeds the range of the instrument, you may dilute the sample. Be sure to perform the dilution according to the manufacturer's directions because the dilution might not have a simple linear relationship to the conductivity.
4. Rinse the probe with distilled or deionized water and repeat step 8 until finished.

Materials

Conductivity Meters
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