Following the completion of the reflux procedure, spanning a duration of approximately 12 to 15 hours, the synthesized complex underwent a filtration step. This crucial purification step was specifically implemented to effectively eliminate any residual impurities that may have been present in the solution, and a visual representation of this process is available in the accompanying video for further observation and clarity. 

Here, you can observe the process of utilising a Rotavapor to effectively eliminate the solvent from the complex, a crucial step in refining and isolating the synthesized compound for further analysis and characterization. 

Technique Summary

• Process: Conducted laboratory-scale purification of ethanol using Fractional Distillation, a technique critical for separating volatile liquids with close boiling points.

• Insulation: Employed aluminum foil covering around the fractional column to minimize heat loss to the surroundings. This ensured a more stable and accurate temperature gradient within the column, thus improving the efficiency of the separation and the purity of the collected ethanol fraction.

• Skills Demonstrated:

  • Precision: Expert setup and calibration of glassware for accurate temperature control.

  • Methodological Rigor: Application of insulation techniques to optimize process efficiency.

  • Safety: Adherence to strict solvent handling and heating protocols.

Coordination Complex formation and decomposition, control of chemical equilibrium (pH dependence), and density-based layering. 

Observational & Technical Skills Demonstrated                                  

1. Initial HCl Addition:

Acidic Pre-Treatment. HCl ensures the initial solution is acidic, suppressing the formation of insoluble copper hydroxides when NH3 is later added.

2. Liquid NH3 Addition:

Coordination Complex Formation. Excess ammonia acts as a strong ligand, forming the intense dark violet/deep blue Tetraamminecopper(II) complex, [Cu(NH3)4]SO4.

3. Concentrated HCl Drop Layer:

Equilibrium Reversal & Density Layering. The concentrated HCl is carefully layered over the complex solution. The acid rapidly decomposes the complex (by reacting with the NH3 ligand), demonstrating the reversibility of the coordination complex equilibrium and showcasing precision in liquid manipulation.

Presented by:  Name: M. Fajar Naseer | Researcher | Passionate Learner

In this short video, I explained the concept of a Galvanic Cell to my Class during my bachelor's studies, one of the essential topics in electrochemistry.

I made this video to demonstrate both my subject knowledge and my ability to explain scientific concepts clearly. This piece is a part of my passion for science communication, teaching, and presenting complex ideas easily and visually.

From Oil to Bar: A Cold Process Soap Base Project. This video documents the practical application of basic organic chemistry principles to create a homemade soap base. We cover essential safety procedures, precise ingredient measurement, and the critical stages of emulsification and curing, showcasing the successful transformation of common fats into a functional, sustainable product.