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Co(H2O)6]2+, [CoCl4]2- Equilibrium (common ion) 1.Effect of concentrated HCl. Place about 10 drops of 1.0 M...

Co(H2O)6]2+, [CoCl4]2- Equilibrium (common ion)
1.Effect of concentrated HCl. Place about 10 drops of 1.0 M CoCl2 in a 75 mm test tube.
2.Add drops of concentrated HCl (Caution: Avoid inhalation and skin contact). This solution is found in the hood. Place the test tube in a test tube rack.
3.Remove and hold the coin stopper while you use it. Place coin stopper on bottle when done) until a color change occurs.
4.Slowly add water to the system and stir.
5.Record and explain your observations.

Solution   Observation
1   Pink in color
3   Dark blue clear
4   HCL was neutralized

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