Naming guidelines from book. These apply to the flow chart. Ask yourself the same ques=ons every =me.
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1 Naming guidelines from book These apply to the flow chart. Ask yourself the same ques=ons every =me.
2 Naming Chemical Compounds Prac=cing Skills: Chemical Here are some guidelines for helping you name a chemical compound from the chemical formula. If the compound contains a metallic cation that can have different ionic charges, use a Roman numeral to indicate the numerical value of the ionic charge in the compound.
3 This flowchart provides you with a sequence of ques=ons for naming a compound when you kw its formula. Binary molecular Use prefixes in the name. Q = Metal? Q x R y Q = H? > 2 Elements? Name the ions. Acid Review the rules given in Table 9.5. Q = Group A? Name the ions; use a Roman numeral with the ca=on. Q = Group A? Name the ions. Name the ions; use a Roman numeral with the ca=on.
4 Apply the general formula Q x R y to each compound. Q x R y Q = H? > 2 Elements? Acid Review the rules given in Table 9.5. Q and R can be atoms, monatomic ions, or polyatomic ions. Binary molecular Use prefixes in the name. Q = Metal? Q = Group A? Name the ions. Q = Group A? Name the ions; use a Roman numeral with the ca=on. Name the ions. Name the ions; use a Roman numeral with the ca=on.
5 For example, to name HNO 3, let H = Q and NO 3 = R. Follow the first arrow down to the ques=on Q = H? The answer is, so the compound is an acid. Follow the rules for naming acids. Binary molecular Use prefixes in the name. Q = Metal? Name the ions. Q x R y Q = H? > 2 Elements? Q = Group A? Name the ions. Q = Group A? Name the ions; use a Roman numeral with the ca=on. Acid Review the rules given in Table 9.5. Name the ions; use a Roman numeral with the ca=on.
6 Writing Chemical Formulas In wri=ng a chemical formula from a chemical name, it is helpful to remember the following guidelines. An -ide ending generally indicates a binary compound.
7 Writing Chemical Formulas In wri=ng a chemical formula from a chemical name, it is helpful to remember the following guidelines. An -ite or -ate ending means a polyatomic ion that includes oxygen is in the formula.
8 Writing Chemical Formulas In wri=ng a chemical formula from a chemical name, it is helpful to remember the following guidelines. Prefixes in a name generally indicate that the compound is molecular.
9 Writing Chemical Formulas In wri=ng a chemical formula from a chemical name, it is helpful to remember the following guidelines. A Roman numeral after the name of a cation shows the ionic charge of the cation.
10 The ques=ons in this flowchart will help you write the formula for a compound when you kw its name. Group A elements Use Table 9.1 to obtain Name of Compound Contains prefixes? Ionic compound Iden=fy the symbols. Roman numerals Give charges for the ca=ons. Molecular compound Use prefixes to write the formula. Polyatomic ions Use Table 9.3 to obtain Balance charges Use the crisscross method.
11 Use the flowchart to write the formula for sodium chromate. Sodium chromate Contains prefixes? Ionic compound Iden=fy the symbols. Molecular compound Use prefixes to write the formula. The name does t contain prefixes, so the compound is ionic. Group A elements Use Table 9.1 to obtain Roman numerals Give charges for the ca=ons. Balance charges Use the crisscross method. Polyatomic ions Use Table 9.3 to obtain
12 The ions are sodium ion and chromate ion. Sodium is a Group A element, so its ionic charge is +1. Group A elements Use Table 9.1 to obtain Sodium chromate Contains prefixes? Ionic compound Iden=fy the symbols. Roman numerals Give charges for the ca=ons. Molecular compound Use prefixes to write the formula. Polyatomic ions Use Table 9.3 to obtain Balance charges Use the crisscross method.
13 Chromate ion is a polyatomic ion, so use Table 9.3 to obtain its charge (2 ). Sodium chromate Contains prefixes? Ionic compound Iden=fy the symbols. Molecular compound Use prefixes to write the formula. Balance the charges to obtain the formula Na 2 CrO 4. Group A elements Use Table 9.1 to obtain Roman numerals Give charges for the ca=ons. Balance charges Use the crisscross method. Polyatomic ions Use Table 9.3 to obtain
14 CHEMISTRY & YOU Use the flowchart to help you write the formula for silicon dioxide. Name of Compound Contains prefixes? Ionic compound Iden=fy the symbols. Molecular compound Use prefixes to write the formula. Group A elements Use Table 9.1 to obtain Roman numerals Give charges for the ca=ons. Polyatomic ions Use Table 9.3 to obtain Balance charges Use the crisscross method.
15 CHEMISTRY & YOU Use the flowchart to help you write the formula for silicon dioxide. The name silicon dioxide contains a prefix, so it is a molecular compound. Using the prefixes, the formula is SiO 2. Group A elements Use Table 9.1 to obtain Name of Compound Contains prefixes? Ionic compound Iden=fy the symbols. Roman numerals Give charges for the ca=ons. Molecular compound Use prefixes to write the formula. Polyatomic ions Use Table 9.3 to obtain Balance charges Use the crisscross method.
16 Use the flowchart to name Fe 2 S 3, which is commonly kwn as fool s gold because of its shine and color. Q x R y Q = H? > 2 Elements? Acid Review the rules given in Table 9.5. Q = Metal? Q = Group A? Binary molecular Use prefixes in the name. Name the ions. Name the ions; use a Roman numeral with the ca=on. Q = Group A? Name the ions. Name the ions; use a Roman numeral with the ca=on.
17 Use the flowchart to name Fe 2 S 3, which is commonly kwn as fool s gold because of its shine and color. Q x R y Q = H? > 2 Elements? Acid Review the rules given in Table 9.5. Q = Metal? Q = Group A? FeS is called iron(ii) sulfide. Binary molecular Use prefixes in the name. Name the ions. Q = Group A? Name the ions. Name the ions; use a Roman numeral with the ca=on. Name the ions; use a Roman numeral with the ca=on.
18 Key Concepts If the ra=o of atoms of each element in a compound is fixed, then the ra=o of their masses is also fixed. Follow the rules for naming acids when H is the first element. If the compound is binary, generally the name ends with - ide. For a molecular binary compound, use prefixes to indicate the number of atoms. When a polyatomic ion with oxygen is in the formula, the compound name ends in - ite or - ate. If the compound contains a metallic ca=on that can have different ionic charges, use a Roman numeral to indicate the ionic charge.
19 Key Concepts An - ide ending usually indicates a binary compound. An - ite or - ate ending indicates a polyatomic ion with oxygen. Prefixes usually indicate a molecular compound. A Roman numeral acer the name of a ca=on shows the ionic charge of the ca=on.
20 Glossary Terms law of definite proportions: in samples of any chemical compound, the masses of the elements are always in the same proportion law of multiple proportions: whenever two elements form more than one compound, the different masses of one element that combine with the same mass of the other element are in the ratio of small whole numbers
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