IUPAC Quiz: Naming Chemical Compounds

The correct answer is Lead(II) Chloride. This compound is commonly known as lead chloride. The Roman numeral II in parentheses indicates that lead is in its +2 oxidation state. This is because the chloride ion has a charge of -1, so in order for the compound to be neutral, lead must have a +2 charge. Therefore, the correct name for PbCl2 is Lead(II) Chloride.

The formula for Barium Sulfide is BaS. This is because Barium has a 2+ charge and Sulfur has a 2- charge, so they combine in a 1:1 ratio to form BaS.

The formula for Iron(II) Nitride is Fe3N2. This is because Iron(II) has a +2 charge and Nitride has a -3 charge. To balance the charges, we need three Iron(II) ions (each with a +2 charge) to combine with two Nitride ions (each with a -3 charge), resulting in Fe3N2.

The correct answer is Zn(OH)2. Zinc hydroxide is composed of one zinc ion (Zn2+) and two hydroxide ions (OH-). The formula Zn(OH)2 represents this composition, with the subscript 2 indicating the presence of two hydroxide ions. Zinc hydroxide is a white solid that is commonly used in various applications, including as a precursor for the production of zinc oxide and as an ingredient in pharmaceuticals and cosmetics.

CuO is known as Copper(II) Oxide because it contains copper in its +2 oxidation state. The Roman numeral II in the name indicates the oxidation state of the copper atom in the compound. Copper(I) Oxide would refer to a compound where copper is in its +1 oxidation state, which is not the case for CuO. Copper Oxide(II) is not a commonly used naming convention for this compound.

The formula for FrBr is Francium Bromide.

It is an ionic compound made up of:

Fr⁺ (francium ion, a metal that loses one electron)

Br⁻ (bromide ion, a nonmetal that gains one electron)

Since both ions have charges of ±1, the formula is simply:

Francium is a highly reactive alkali metal and bromide is a halogen. When these two elements combine, they form an ionic compound known as francium bromide.

CuCl is commonly known as Copper(I) Chloride. This is because CuCl contains copper in its +1 oxidation state, hence the Roman numeral (I) in the name. The compound is formed by the combination of one copper atom and one chlorine atom, resulting in the formation of Copper(I) Chloride.

Copper(I) oxide is represented by the chemical formula Cu2O. This formula indicates that there are two copper atoms (Cu) and one oxygen atom (O) in the compound. The subscript 2 next to Cu indicates that there are two copper atoms bonded together, while the absence of a subscript next to O indicates that there is only one oxygen atom. Therefore, Cu2O is the correct formula for Copper(I) oxide.

The correct answer is Magnesium Sulfite. The chemical formula for Magnesium Sulfite is MgSO3. It is composed of one magnesium ion (Mg2+) and one sulfite ion (SO3^2-). Manganese Sulfate is a different compound with the chemical formula MnSO4. Magnesium Sulfate, on the other hand, has the chemical formula MgSO4. Therefore, the correct chemical name for MgSO3 is Magnesium Sulfite.

The correct answer is Al(ClO3)3. This is because the formula for aluminum chlorate is derived from the charges of the ions involved. The aluminum ion has a charge of +3, while the chlorate ion (ClO3-) has a charge of -1. To balance the charges, three chlorate ions are needed for every aluminum ion, resulting in the formula Al(ClO3)3.