Name of the following compound:KBr, Na2CO3 ,FeSO4, CrCl3
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potassium bromide
sodium carbonate
iron(II) sulfate
chromium(III) chloride.
To determine the name of each compound, we need to identify the elements and their respective charges in each compound.
1. KBr:
- K represents the element potassium, which has a charge of +1.
- Br represents the element bromine, which has a charge of -1.
- Therefore, the compound KBr is called potassium bromide.
2. Na2CO3:
- Na represents the element sodium, which has a charge of +1 in this compound.
- CO3 represents the polyatomic ion carbonate, which has a charge of -2.
- Since there are two sodium atoms, the overall charge of sodium in this compound is +2 (2 x +1).
- Therefore, to balance the charges, the compound is called sodium carbonate.
3. FeSO4:
- Fe represents the element iron, which can have different charges. In this compound, iron has a charge of +2.
- SO4 represents the polyatomic ion sulfate, which has a charge of -2.
- Therefore, the compound FeSO4 is called iron (II) sulfate.
4. CrCl3:
- Cr represents the element chromium, which can also have different charges. In this compound, chromium has a charge of +3.
- Cl represents the element chlorine, which has a charge of -1.
- Therefore, the compound CrCl3 is called chromium (III) chloride.
Remember that when naming compounds, we use Roman numerals in parentheses after the metal name to indicate the charge on the metal ion when it can have multiple charges, as in the cases of iron (II) and chromium (III).