Station 4 Writing names from formulas

What is the correct name for the following compound: NH4CNO?

• Ammonium cyanate

• Ammonia cyanite

• Ammonium cyanite

• Ammonium cyanide

Answer explanation

The compound NH4CNO consists of the ammonium ion (NH4+) and the cyanate ion (CNO-). Therefore, the correct name is ammonium cyanate, distinguishing it from similar compounds like cyanide or cyanite.

What is the correct name for the following compound: ZnO?

• Zinc oxide

• Zinc oxalide

• Zinc oxate

• Zinc iodide

Answer explanation

The compound ZnO consists of zinc (Zn) and oxygen (O). The correct name is Zinc oxide, as it directly describes the elements and their oxidation states. The other options do not accurately represent this compound.

What is the correct name for the following compound: BeCl2?

• Beryllium chloride

• Beryllium chlorine

• Beryllium Fluorate

• Beryllium Bromide

Answer explanation

The compound BeCl2 consists of beryllium (Be) and chlorine (Cl). The correct naming convention for binary compounds is to use the name of the first element followed by the name of the second element with 'ide'. Thus, it is called beryllium chloride.

What is the correct name for the following compound: Ag(HSO4)2?

• Silver hydrogen sulfate

• Silver hydrogen sulfide

• Silver hydrogen sulfite

• Silver dihydrogen sulfide

Answer explanation

The compound Ag(HSO4)2 contains two hydrogen sulfate ions (HSO4-). Therefore, the correct name is Silver hydrogen sulfate, as it reflects the presence of silver and the hydrogen sulfate anion.

What is the correct name for the following compound: Fe(ClO2)3?

• Iron chlorite

• Iron chlorine

• Iron Fluorite

• Iron Bromate

Answer explanation

The compound Fe(ClO2)3 contains iron (Fe) and chlorite ions (ClO2-). The correct name reflects the oxidation state of iron and the polyatomic ion, making it Iron chlorite. Other options do not match the components.

What is the correct name for the following compound: Cu2C2O4?

• Copper (I) oxalate

• Copper III oxalide

• Copper (II) oxalite

• Copper (I) oxalide

Answer explanation

The compound Cu2C2O4 contains copper in the +1 oxidation state, as indicated by the formula. Therefore, the correct name is Copper (I) oxalate, not the other options which suggest different oxidation states or incorrect naming.

Tags

NGSS.HS-PS1-2

What is the correct name for the following compound: PbHPO4?

• Lead (II) hydrogen phosphate

• Lead (II) hydrogen phosphide

• Lead (II) hydrogen phosphite

• Lead (III) dihydrogen phosphate

Answer explanation

The compound PbHPO4 contains lead (Pb) with a +2 oxidation state, hence 'Lead (II)'. The 'HPO4' indicates it is a hydrogen phosphate, making the correct name 'Lead (II) hydrogen phosphate'.

What is the correct name for the following compound: CoCrO4?

• Cobalt (II) chromate

• Coboolt (II) chromide

• Cobalt (II) chromite

• Cobalt (III) chromide

Answer explanation

The compound CoCrO4 contains cobalt (Co) and chromate (CrO4) ions. The oxidation state of cobalt here is +2, making the correct name Cobalt (II) chromate. The other options are incorrect due to misidentification of the compound.

What is the correct name for the following compound: PbBr2?

• Lead (II) bromide

• Lead (II) bromite

• Lead (II) bromate

• Lead (III) bromide

Answer explanation

The compound PbBr2 contains lead (Pb) with a +2 oxidation state and bromine (Br) with a -1 oxidation state. Therefore, the correct name is Lead (II) bromide, indicating the +2 charge of lead.

What is the correct name for the following compound: CuI2?

• Copper (II) iodide

• Copper (II) iodite

• Copper (II) iotrate

• Copper (III) iodide

Answer explanation

The compound CuI2 contains copper and iodine. The Roman numeral II indicates that copper has a +2 oxidation state, making the correct name Copper (II) iodide. The other options are incorrect as they do not match the compound's composition.