6.3 Naming Compounds
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Transcript of 6.3 Naming Compounds
6.3 Naming Compounds and Writing Formulas
6.3 Naming Compounds and Writing Formulas
• You Will Need:– 2pgs of CN– Worksheet under
the Oil/Water Bottle
• Agenda:– 6.3 Opener– 6.3 Lecture– 6.3 Wksht
• Opener:
• On the top half of the worksheet complete the table as best as you can.
6.3 Naming Compounds and Writing Formulas
Describing Ionic Compounds
The name of an ionic compound must distinguish the compound from other ionic compounds containing the same elements. The formula of an ionic compound describes the ratio of the ions in the compound.
6.3 Naming Compounds and Writing Formulas
Binary Ionic CompoundsA compound made from only two elements is a binary compound.
Naming binary ionic compounds, such as sodium chloride and cadmium iodide, is easy.
Describing Ionic Compounds
6.3 Naming Compounds and Writing Formulas
This table lists eight common anions. The name of an anion is formed by adding the
suffix –ide to the stem of the name of the nonmetal.
Describing Ionic Compounds
6.3 Naming Compounds and Writing Formulas
Metals With Multiple Ions
Describing Ionic Compounds
6.3 Naming Compounds and Writing Formulas
A covalently bonded group of atoms that has a positive or negative charge and acts as a unit is a polyatomic ion. Most simple polyatomic ions are anions.
Describing Ionic Compounds
6.3 Naming Compounds and Writing Formulas
Writing Formulas for Ionic Compounds• The symbol of the cation is first, followed by the
symbol of the anion. • Use subscripts to show the ratio of the ions in the
compound. • Parentheses are used with the subscript for
polyatomic ions. The formula for iron(III) hydroxide is Fe(OH)3.
Describing Ionic Compounds
6.3 Naming Compounds and Writing Formulas
Writing Formulas for Ionic CompoundsWhat is the formula for the ionic compound calcium chloride?
Describing Ionic Compounds
6.3 Naming Compounds and Writing Formulas
Read and UnderstandWhat information are you given?
The name of the compound is calcium chloride.
Describing Ionic Compounds
6.3 Naming Compounds and Writing Formulas
2. List the symbols and charges for the cation and anion.
Ca with a charge of 2+ and Cl with a charge of 1–
3. Determine the ratio of ions in the compound.
It takes two 1– charges to balance the 2+ charge. There will be two chloride ions for each calcium ion.
4. Write the formula for calcium chloride.CaCl2
Describing Ionic Compounds
6.3 Naming Compounds and Writing Formulas
1. Write the formula for the compound calcium oxide.
Describing Ionic Compounds
6.3 Naming Compounds and Writing Formulas
1. Write the formula for the compound calcium oxide.
Answer: It takes one calcium ion with a charge of 2+ to balance one oxide ion with a charge of 2–. The formula is CaO.
Describing Ionic Compounds
6.3 Naming Compounds and Writing Formulas
2. Write the formula for the compound copper(I) sulfide.
Describing Ionic Compounds
6.3 Naming Compounds and Writing Formulas
2. Write the formula for the compound copper(I) sulfide.
Answer: It takes two copper (I) ions , each with a charge of 1+, to balance one sulfide ion with a charge of 2–. The formula is Cu2S.
Describing Ionic Compounds
6.3 Naming Compounds and Writing Formulas
3. Write the formula for the compound sodium sulfate.
Describing Ionic Compounds
6.3 Naming Compounds and Writing Formulas
3. Write the formula for the compound sodium sulfate.
Answer: It takes two sodium ions, each with a charge of 1+, to balance one sulfate ion with a charge of 2–. The formula is Na2SO4.
Describing Ionic Compounds
6.3 Naming Compounds and Writing Formulas
4. What is the name of the compound whose formula is NaOH?
Describing Ionic Compounds
6.3 Naming Compounds and Writing Formulas
4. What is the name of the compound whose formula is NaOH?
Answer: In the formula, Na represents the sodium ion, and OH represents the hydroxide ion. The name of the compound is sodium hydroxide.
Describing Ionic Compounds