Chromate Ion and Lithium Concepts

The video tutorial explains how to write the chemical formula for lithium chromate. It begins by identifying lithium and chromate, noting that chromate is a polyatomic ion with a charge of two minus. The tutorial then discusses balancing the charges between lithium, which has a charge of one plus, and chromate to achieve a net charge of zero. The final formula for lithium chromate is presented as Li2CrO4.

What is the symbol for lithium?

• Lt

• Li

• L

• Lm

What is the formula for the chromate ion?

• CrO3

• CrO4

• Cr2O7

• CrO2

What is the ionic charge of the chromate ion?

• 2+

• 1-

• 2-

• 1+

In which group is lithium found on the periodic table?

• Group 4

• Group 3

• Group 2

• Group 1

How many lithium ions are needed to balance the charge of one chromate ion?

• Three

• Four

• Two

• One