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Chemistry Asked by a SnapAndSolve user · about 2 hours ago

For each formula: (1) identify the compound type, (2) name the compound, and (3) be ready to explain which...

For each formula: (1) identify the compound type, (2) name the compound, and (3) be ready to explain which rule you used.
Formula
1. NaS
2. CO2
3. FeCl3
4. Ca(NO3)2
5. N2O
6. CuO
7. Al2O3
8. PCl5
9. K2CO3
10. PbO2
11. SO3
12. Mg3(PO4)2
Explain your thinking:
1. Why is a Roman numeral needed in a name such as iron(III) chloride?
2. Why don’t we use prefixes when naming ordinary ionic compounds?
3. In Fe2(SO4)3, how do you know the charge on each iron ion?
4. What is the first clue you look for when deciding which naming system to use?

Answer

  1. NaS:

    Compound type: Ionic
    Name: Sodium sulfide

  2. CO2:

    Compound type: Covalent
    Name: Carbon dioxide

  3. FeCl3:

    Compound type: Ionic
    Name: Iron(III) chloride

  4. Ca(NO3)2:

    Compound type: Ionic
    Name: Calcium nitrate

  5. N2O:

    Compound type: Covalent
    Name: Dinitrogen monoxide

  6. CuO:

    Compound type: Ionic
    Name: Copper(II) oxide

  7. Al2O3:

    Compound type: Ionic
    Name: Aluminum oxide

  8. PCl5:

    Compound type: Covalent
    Name: Phosphorus pentachloride

  9. K2CO3:

    Compound type: Ionic
    Name: Potassium carbonate

  10. PbO2:

    Compound type: Ionic
    Name: Lead(IV) oxide

  11. SO3:

    Compound type: Covalent
    Name: Sulfur trioxide

  12. Mg3(PO4)2:

    Compound type: Ionic
    Name: Magnesium phosphate

Explain your thinking:

  1. A Roman numeral is needed to indicate the oxidation state of the metal in compounds where the metal can have more than one possible charge.

  2. Prefixes are not used in ordinary ionic compounds because the charges on the ions determine the ratio in which they combine.

  3. In Fe2(SO4)3, the charge on each iron ion is +3 because the sulfate ion has a charge of -2, and the overall charge must balance to zero.

  4. The first clue is whether the compound is ionic or covalent, which can be determined by the types of elements involved (metal with non-metal for ionic, non-metal with non-metal for covalent).

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