Calcium Nitrate and Ion Charges

Dr. B explains how to write the formula for the ternary ionic compound calcium nitrate. The process involves identifying the element symbols and charges for calcium and nitrate using the periodic table and common ion table. The crisscross method is used to balance the charges, ensuring a net charge of zero. The formula is verified for correctness, and additional resources for practice are provided.

What is the main objective of the video presented by Dr. B?

• To discuss the properties of metals

• To write the formula for calcium nitrate

• To describe the process of photosynthesis

• To explain the periodic table

Which group in the periodic table does calcium belong to?

• Group 1

• Group 2

• Group 3

• Group 4

What is the charge of a calcium ion?

• 1+

• 2+

• 1-

• 2-

What is the chemical formula for the nitrate ion?

• NO2

• NO3

• N2O

• NH4

What is the charge of the nitrate ion?

• 2-

• 1-

• 2+

• 1+

Which method is used to balance the charges in calcium nitrate?

• Crisscross method

• Addition method

• Cross-multiplication method

• Substitution method

Why are parentheses used in the formula for calcium nitrate?

• To apply the subscript to the entire nitrate ion

• To show the charge of calcium

• To indicate a chemical reaction

• To separate different elements

What is the net charge of the correctly balanced calcium nitrate formula?

• 2+

• 1-

• 0

• 1+

How do you verify the correctness of the calcium nitrate formula?

• By checking the color of the compound

• By ensuring the net charge is zero

• By measuring the mass

• By testing its solubility

What is the final correct formula for calcium nitrate?

• CaNO3

• Ca(NO3)2

• Ca2(NO3)

• Ca(NO2)3