Balancing Charges in Compounds

The video tutorial explains how to write the chemical formula for chromium 2 nitrate. It begins by identifying the element symbols and charges for chromium and nitrate. The tutorial then demonstrates the crisscross method to balance the charges, ensuring the compound is neutral. Finally, it verifies the formula by checking the net charge, confirming the correct formula for chromium 2 nitrate.

What is the symbol for chromium on the periodic table?

• Cm

• Cr

• Co

• Ch

What is the charge of the nitrate ion?

• 2-

• 2+

• 1-

• 1+

Why is it important to balance the charges in a compound?

• To increase its weight

• To change its color

• To ensure the compound is neutral

• To make it more reactive

What method is used to balance the charges in chromium 2 nitrate?

• Substitution method

• Crisscross method

• Cross-multiplication method

• Addition method

What do you need to do with the nitrate when using the crisscross method?

• Put parentheses around it

• Change its charge

• Remove it

• Add a subscript of 3

How do you verify the correctness of the chromium 2 nitrate formula?

• By testing its solubility

• By measuring its weight

• By ensuring the net charge is zero

• By checking the color

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

• 1+

• 1-

• 0

• 2+

Who is the presenter of the video?

• Dr. C

• Dr. A

• Dr. V

• Dr. B