Sodium and Oxalate Ion Concepts

The video tutorial explains how to write the chemical formula for sodium oxalate. It begins by identifying the element symbol for sodium and the oxalate ion, which is not found on the periodic table. The tutorial describes the oxalate ion as C2O4 with a 2- charge. It then explains the ionic nature of the compound, consisting of a metal (sodium) and non-metals (oxalate ion), and emphasizes the importance of balancing the charges to achieve a net charge of zero. The tutorial concludes by showing that the formula for sodium oxalate is Na2C2O4.

What is the element symbol for sodium?

• Sm

• Sd

• So

• Na

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

• CO3

• C2O3

• CO4

• C2O4

What is the charge on a sodium ion?

• 2+

• 2-

• 1+

• 1-

What is the charge on the oxalate ion?

• 2+

• 1+

• 2-

• 1-

How many sodium ions are needed to balance the charge of one oxalate ion?

• 1

• 2

• 3

• 4

What is the correct formula for sodium oxalate?

• NaC2O3

• Na2CO3

• Na2C2O4

• NaC2O4