Dichromate Ion and Copper Compounds

The video tutorial explains how to write the formula for Copper(II) Dichromate. It begins by identifying the symbols and charges of copper and dichromate ions. Copper, being a transition metal, has a 2+ charge, while the dichromate ion is Cr2O7 with a 2- charge. The tutorial demonstrates how these ions combine to form a neutral ionic compound, Copper(II) Dichromate, ensuring the net charge is zero. The video concludes with the final formula and a brief sign-off by Dr. B.

What is the symbol for copper and its charge in Copper(II) Dichromate?

• Co with a 1+ charge

• Co with a 2+ charge

• Cu with a 1+ charge

• Cu with a 2+ charge

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

• Cr2O7 with a 1- charge

• Cr2O7 with a 2- charge

• CrO4 with a 2- charge

• CrO4 with a 1- charge

How can you find the formula for the dichromate ion if you haven't memorized it?

• By asking a friend

• By checking a table of polyatomic ions

• By looking it up on the periodic table

• By guessing based on other ions

What type of compound is Copper(II) Dichromate?

• Molecular compound

• Metallic compound

• Ionic compound

• Covalent compound

Why must the charges in Copper(II) Dichromate add up to zero?

• Because it is a charged ion

• Because it is a neutral compound

• Because it is a covalent compound

• Because it is a metallic compound

What is the net charge of Copper(II) Dichromate?

• 1+

• 0

• 2-

• 2+