Cobalt 2 Nitrate Concepts

The video tutorial explains how to write the chemical formula for Cobalt 2 Nitrate. It begins by identifying the element symbols for Cobalt and Nitrate, emphasizing the importance of correct notation to avoid confusion. The tutorial then discusses the nitrate ion's charge and the significance of the transition metal charge for Cobalt. Using the crisscross method, the tutorial demonstrates how to balance the charges to achieve a net charge of zero. The final formula is verified, ensuring the correct representation of Cobalt 2 Nitrate.

What is the correct symbol for Cobalt on the periodic table?

• Cb

• Ca

• Co

• Cl

What is the charge of the nitrate ion?

• 2-

• 1+

• 2+

• 1-

Why is it important to know that Cobalt is a transition metal in this context?

• It indicates the charge of the Cobalt ion.

• It changes the state of matter.

• It affects the melting point.

• It determines the color of the compound.

What is the charge on the Cobalt ion in Cobalt 2 nitrate?

• 3+

• 0

• 2+

• 1+

What method is used to balance the charges in the formula?

• Cross-multiplication method

• Crisscross method

• Addition method

• Substitution method

Why do we use parentheses around the nitrate ion in the formula?

• To make it look neat

• To indicate it is a gas

• To show the charge applies to the whole ion

• To separate it from other ions

What is the final formula for Cobalt 2 nitrate?

• Co(NO3)2

• Co(NO2)2

• Co2(NO3)

• Co(NO3)3

How do we verify that the formula for Cobalt 2 nitrate is correct?

• By testing its solubility

• By measuring the mass

• By checking the color

• By ensuring the net charge is zero

What is the net charge of the Cobalt 2 nitrate compound?

• 0

• 1-

• 1+

• 2+