The video tutorial explains how to write the formula for aluminum dichromate. It begins by identifying the element symbols and their ionic charges, using the periodic table as a reference. The tutorial then demonstrates how to balance these charges to achieve a neutral compound, employing the crisscross method for simplification. Finally, the video verifies the formula by checking the net charge, ensuring it sums to zero.

What is the symbol for aluminum in the periodic table?

• Ag

• Au

• Am

• Al

Which of the following is the correct formula for the dichromate ion?

• CrO7^2-

• Cr2O4^2-

• Cr2O7^2-

• CrO4^2-

What is the ionic charge of the dichromate ion?

• 2-

• 2+

• 1-

• 3-

In which group of the periodic table is aluminum found?

• Group 17

• Group 13

• Group 1

• Group 18

What is the ionic charge of aluminum?

• 4+

• 2+

• 1+

• 3+

What method is used to balance the charges in aluminum dichromate?

• Cross-multiplication

• Crisscross method

• Substitution method

• Addition method

Why do we need to use parentheses around the dichromate ion in the formula?

• To separate it from aluminum

• To show it's a complex ion

• To indicate multiple ions

• To balance the equation

What is the final formula for aluminum dichromate?

• Al(Cr2O7)2

• Al2(CrO4)3

• Al2(Cr2O7)3

• Al3(Cr2O7)2

What is the net charge of aluminum dichromate?

• 3+

• 0

• 1+

• 2-