Ionic Compounds and Charge Balancing

Dr. B explains how to write the formula for calcium nitrate, a ternary ionic compound. The video covers identifying the compound type, using the periodic table and polyatomic ion table to find the necessary elements and ions, and balancing the charges using the crisscross method. The tutorial concludes with verifying the formula's correctness.

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

• To balance chemical equations

• To explain the periodic table

• To write the formula for calcium nitrate

• To discuss the properties of calcium

What type of compound is formed when a metal and a group of non-metals combine?

• Binary ionic compound

• Ternary ionic compound

• Covalent compound

• Metallic compound

Which element symbol is used for calcium in the periodic table?

• Cl

• C

• Ca

• Cu

What is the charge of the nitrite ion?

• NO3-

• NO2+

• NO2-

• NO3+

How do you determine the charge of calcium using the periodic table?

• By its position in the periodic table

• By checking its group number

• By looking at its atomic number

• By its atomic mass

What method is used to balance the charges in the formula for calcium nitrite?

• Cross-multiplication method

• Addition method

• Substitution method

• Crisscross method

What should be done with the charges after using the crisscross method?

• Multiply them

• Remove them

• Ignore them

• Add them to the formula

Why is it important to check the charges after deriving the formula?

• To check the element's position

• To confirm the atomic number

• To verify the atomic mass

• To ensure the formula is balanced

What is the net charge of a correctly balanced ionic compound?

• Negative

• Zero

• Depends on the elements

• Positive

What is the final formula for calcium nitrite as derived in the video?

• CaN2O2

• CaN2O4

• Ca(NO2)2

• Ca(NO3)2