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What is Cobalt Chloride Color Change Experiment about?

This document describes a demonstration showing the color change of cobalt chloride solutions. A blue solution is formed by dissolving cobalt chloride in ethanol. When water is added, the solution changes to a deep pink color. This color change occurs due to the equilibrium between two cobalt complex ions, [Co(H2O)6]2+ and [CoCl4]2-, being disturbed by the addition of water. The presence of ethanol forces the chloride ion to coordinate more closely with cobalt, forming the blue [CoCl4]2- complex, while addi

Author

Ella San Pedro

Language

EN