Binary and ternary compounds
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The document discusses ternary compounds, which contain three different elements. It provides examples of writing chemical formulas for compounds formed by reactions between cations and anions, such as sodium and hydroxide forming sodium hydroxide. The document also discusses naming conventions for binary and ternary compounds, including using Roman numerals in parentheses to indicate an ion's charge for elements that can have more than one oxidation number.
Binary and ternary compounds
- 1. Ternary compounds – compounds which contain three different elements. Example. Try to find out the chemical formula of the compound formed by the reaction of sodium and a polyatomic hydroxide ion.
- 2. Note that the charge is understood to be one and is not written anymore as a subscript in the formula. Example 2. What is the chemical formula formed by the reaction of calcium and a carbonate? Subscripts should be the smallest set of whole numbers possible. As you can see on calcium carbonate, no subscripts were written since both contain two atoms. What is the chemical formula formed by the reaction of aluminum and sulfate? What chemical formula would you form by the reaction of Barium and Phosphate?
- 3. Naming binary and Ternary Compounds In naming binary compounds, you should name the cation first (specify the charge, if many). Then, name the anion by changing the suffix to –ide. Stock System The system uses the Roman Numeral to describe an ion’s charge. The Roman Numeral is enclosed in parenthesisand placed immediatelyafter the metal name. Such elements are said to have more than one ion with variable oxidationnumber and below is the list of those elements.