Silver Dichromate and Its Properties

The video tutorial explains how to write the formula for silver dichromate. It begins by identifying the element symbol for silver and the formula for the dichromate ion, which is a polyatomic ion with a charge of two minus. The tutorial discusses the need to balance the charges to form a neutral compound, given that silver is a transition metal with a typical charge of one plus. By using two silver ions, the charges balance out, resulting in the formula Ag2Cr2O7. The video also touches on naming conventions, noting that while silver is a transition metal, it is usually not necessary to specify its charge with a Roman numeral.

What is the element symbol for silver?

• S

• Si

• Au

• Ag

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

• Cr2O7

• CrO3

• CrO4

• Cr3O8

What is the charge of the dichromate ion?

• 1-

• 2+

• 1+

• 2-

Why is silver usually considered to have a charge of 1+?

• Because it is a transition metal

• Because it is a non-metal

• Because it is a noble gas

• Because it is almost always found in the 1+ oxidation state

How many silver ions are needed to balance the charge of one dichromate ion?

• Four

• Three

• One

• Two

What is the correct formula for silver dichromate?

• Ag2CrO4

• AgCrO4

• AgCr2O7

• Ag2Cr2O7

Why might some people use Roman numerals when naming silver dichromate?

• To show the charge of dichromate

• To indicate the number of atoms

• To show the charge of silver

• To indicate the number of ions

Is it necessary to use Roman numerals when naming silver dichromate?

• No, because silver is almost always 1+

• Yes, always

• Yes, but only for non-metals

• No, because dichromate is always 2-