Chromium Nitrate and Nitrate Ions

The video tutorial explains how to write the formula for chromium 6 nitrate. It begins by identifying chromium as a transition metal with a 6+ charge, and nitrate as a polyatomic ion with a 1- charge. The tutorial details how to balance these charges to form a neutral compound, resulting in the formula Cr(NO3)6. It also covers the naming convention for the compound, emphasizing the importance of understanding ionic charges and the use of parentheses in chemical formulas.

What is the charge of chromium in chromium 6 nitrate?

• 3+

• 4+

• 6+

• 2+

Which of the following is a polyatomic ion?

• Na+

• Cl-

• NO3

• O2

What is the charge of the nitrate ion?

• 3-

• 1+

• 1-

• 2-

How many nitrate ions are needed to balance the charge of chromium in chromium 6 nitrate?

• 6

• 3

• 4

• 5

Why are parentheses used around the nitrate ion in the formula for chromium 6 nitrate?

• To highlight its importance

• To separate it from other ions

• To show the charge

• To indicate multiple ions

What is the correct formula for chromium 6 nitrate?

• Cr(NO3)6

• Cr3(NO3)2

• Cr(NO3)3

• Cr2(NO3)3

If given the formula Cr(NO3)6, what is the name of the compound?

• Chromium 3 Nitrate

• Chromium 2 Nitrate

• Chromium 4 Nitrate

• Chromium 6 Nitrate