Cobalt and Dichromate Compounds

The video tutorial explains how to write the formula for Cobalt 3 D Chromate. It begins by identifying the element symbol for Cobalt and its charge, followed by an explanation of the dichromate ion and its charge. The tutorial then demonstrates how to balance these charges to achieve a net charge of zero using the crisscross method. Finally, the video verifies the formula and concludes with a summary of the process.

What is the charge on Cobalt in Cobalt 3 Dichromate?

• 3+

• 1+

• 4+

• 2+

Which of the following is the correct formula for the dichromate ion?

• Cr2O4

• CrO4

• Cr2O7

• CrO3

Why is it necessary for the charges in a compound to add up to zero?

• To make the compound colorful

• To make the compound stable

• To make the compound reactive

• To make the compound visible

What method is used to balance the charges in Cobalt 3 Dichromate?

• Cross-multiplication method

• Crisscross method

• Substitution method

• Addition method

How many dichromate ions are needed to balance the charge of one Cobalt ion?

• Two

• Four

• One

• Three

What is the net charge of the Cobalt 3 Dichromate compound?

• +1

• -1

• 0

• +2

Who is the presenter of the tutorial?

• Dr. C

• Dr. B

• Dr. D

• Dr. A