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Explain what the color change indicated about the changes in the concentrations of Co(H2O)62+ and CoCl42– in each trial.
Trail one
starting color: purple
added 3 drops of Hcl(aq)
end color:blue

Trail two
start color is :blue
added 3 drops of AgNOv3(aq)
and White stuff forms at the bottom.
end color is: light pink

Sagot :

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Addition of HCl  leads to te formation of blue CoCl4^2– while the addition of AgNO3 leads to the formation of pink  Co(H2O)6^2+.

What is equilibrium?

Dynamic equilibrium is said to have been attained in a reaction when the rate of forward reaction is equal to the rate of reverse reaction. Now we have the equilibrium as shown in the image attached.

When we add HCl as in trial 1, the equilibrium position is shifted to the left and blue CoCl4^2– is formed. When we add AgNO3, the Cl^- is precipitated out of solution and the equilibrium shifts towards the left to yield pink Co(H2O)6^2+.

Learn more about equilibrium: https://brainly.com/question/13463225?

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