Chromium(VI) oxide

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/chromiumvi-oxide

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the chemical formula?CrO3
2. What is the oxidation state of chromium?+6
3. How is chromium(VI) oxide made?It is produced by mixing sodium or potassium dichromate with strong sulfuric acid, which creates the orange powder.
4. Why is chromium(VI) oxide used on metal?It helps form a hard, protective layer on metals like aluminum and steel, keeping them from rusting and making them look nice.

Inorganic Compound: A chemical compound that does not contain carbon-hydrogen bonds, unlike organic compounds.
Hygroscopic: A substance that readily absorbs moisture from the surrounding air.
Oxidation State: A number assigned to an element in a chemical compound that represents the number of electrons lost or gained.
Passivation: The formation of a protective surface layer that reduces the chemical reactivity of a material.