The document outlines an iodometric analysis procedure for determining the copper content in discarded PCBs, prepared by Krishnaveni K from the Department of Chemistry at Kongu Engineering College. It details the chemical reactions involved, including the use of standard K2Cr2O7 and other reagents, observing color changes as indicators of the analysis. The results indicate the amount of copper present in a specific volume of solution.

1. DEPARTMENT OF CHEMISTRY
22CYL12 – CHEMISTRY LABORATORY
FOR COMPUTER SYSTEMS
Prepared By
Krishnaveni K
Assistant Professor
Department of Chemistry
Kongu Engineering College,
Perundurai, Erode-638060
B.TECH – IT- “A”
Iodometric Analysis of Copper Content
form Discarded PCBs

3. Standard
K2Cr2O7
Standard
K2Cr2O7
+
dil.H2SO4
Standard
K2Cr2O7
+
dil.H2SO4
+ KI
Standard
K2Cr2O7
+
dil.H2SO4
+ KI +
Starch
Disappearance of blue
colour and appearance of
Faint green colour

5. Made up
Cu
Solution
Cu
solution
+ NH4OH
Cu
solution +
NH4OH +
CH3COOH
Cu
solution +
NH4OH +
CH3COOH
+ KI
Cu
solution +
NH4OH +
CH3COOH
+KI+
Starch
Disappearance of blue
colour and appearance of
milky white precipitate

7. RESULT:
The amount of copper present in 100 ml of the
given solution is ---------------g

8. REFERENCES:
 1.Palanisamy P.N., Manikandan P., Geetha A.& Manjula Rani K,
“Chemistry lab Manual”, 2023.
27-Jul-23

9. 27-Jul-23
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