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Science Clinic => Chemistry => Topic started by: sheilaspns on Nov 18, 2019

Title: Identify the ion that is responsible for the red colour of rubies.
Post by: sheilaspns on Nov 18, 2019

Question 1

Why is zinc used to coat steel objects?

Question 2

Identify the ion that is responsible for the red colour of rubies.
◦ Cr+6
◦ Cr+5
◦ Cr+7
◦ Cr+4
◦ Cr+3

Title: Identify the ion that is responsible for the red colour of rubies.
Post by: jessicaduplan on Nov 18, 2019

Answer 1

Zinc is a stronger reducing agent than iron. As a result, it will react with oxygen in the atmosphere to form a protective zinc oxide coating that prevents corrosion of the steel.

Answer 2

Cr+3