Sodium and Thiosulfate Concepts

The video tutorial explains how to write the chemical formula for sodium thiosulfate. It begins by identifying sodium and the thiosulfate ion, a polyatomic ion not found on the periodic table. The tutorial emphasizes the importance of recognizing thiosulfate as a polyatomic ion and balancing the charges to form an ionic compound. The final formula for sodium thiosulfate is Na2S2O3, which is commonly used in chemistry and industry.

What is the chemical symbol for sodium?

• Cl

• S

• O

• Na

What type of ion is thiosulfate?

• Monatomic ion

• Polyatomic ion

• Cation

• Anion

How can you find the formula for thiosulfate if you don't remember it?

• Look it up on the periodic table

• Use a table of polyatomic ions

• Ask a friend

• Guess based on other formulas

What is the charge of the thiosulfate ion?

• 1-

• 2-

• 1+

• 2+

What is the charge of a sodium ion?

• 1-

• 2+

• 2-

• 1+

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

• 4

• 3

• 2

• 1

What is the chemical formula for sodium thiosulfate?

• NaSO4

• Na2SO3

• Na2S2O3

• Na2SO4

In which fields is sodium thiosulfate commonly used?

• Geology and Meteorology

• Physics and Astronomy

• Chemistry and Industry

• Biology and Medicine

Why is it important to recognize thiosulfate as a polyatomic ion?

• To determine its color

• To write the correct chemical formula

• To balance chemical equations

• To predict its melting point