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Practice Problem 6
Name the following ionic compounds.
(a) Fe(NO3)3
(b) SrCO3
(c) Na2SO3
(d) Ca(ClO)2
Solution
(a) Iron exists in two oxidation states: +2 or +3. It is therefore important to specify that this compound contains the Fe3+ and NO3- ions. The compound is therefore known as iron(III) nitrate.
(b) There is no need to specify the oxidation state of strontium because strontium is in the +2 oxidation state in all of its compounds. SrCO3 is therefore known as strontium carbonate.
(c) There is no need to specify the oxidation state of sodium in this compound because sodium is always in the +1 oxidation state in its compounds. The negative ion in this compound is the SO32-, or sulfite ion, so the compound is sodium sulfite.
(d) This compound consists of Ca2+ and ClO- ions. Once again, the metal is only found in one oxidation state, so this is simply a calcium salt. This compound, which is the solid bleach used in Chlorox 2, is known as calcium hypochlorite.
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