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Maksim231197 [3]
3 years ago
5

What did you observe when heat was added to the penny with iodine?

Chemistry
1 answer:
Andru [333]3 years ago
8 0
This is a difficult task because zinc is much more active than copper and could hardly be passivated. ... The sur- face immediately turns white (the color of copper(I) iodide) and the yellow-brown color of iodine quickly fades. Rinse the coin with water, brighten it with polish and cloth and begin the whole process again.N
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What is the molarity of a solution that contains 0.082 mol KI in a 2.03 L solution?
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molarity of the KI solution = 0.04 mol/L

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The law that we can applied to calculate the M is:  

M = n / V

n - number of moles

V- volume of the solution (liters)

Then insert in the equation the values from the question;  

M = 0.082 mol  /  2.03 L = 0.04 mol/L

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