Quiz type: Names & formulas Molar Mass (aka formula … The Hg22+ ion is unusual because, even though it is a metal ion, it is not monatomic. 1. dinitrogen pentoxide N2O5 2. iron (III) chloride Fel3 3. barium sulfide BaS 4. carbon monoxide CO 5. Predict the formulas for the borate ion and silicate ion, assuming they contain a single B and Si atom, respectively, and follow the trends shown in Figure 2.25. Chromium(III) phosphate has the chemical formula CrPO 4. Number of problems: 5 10 25 50 100! Naming Inorganic Compounds Introduction . As with ionic compounds, the system for naming covalent compounds enables chemists to write the molecular formula from the name and vice versa. The same prefixes are applied to indicate the quantities of cation or anion atoms. Write the formula for the hypobromite and bromite ions. a. Give the chemical formulas for (a) magnesium sulfate, (b) silver sulfide, (c) lead(II) nitrate. Because ionic compounds are electrically neutral, two K+ ions are required to balance the charge of one S2– ion, giving K2S for the empirical formula. The name of an acid is related to the name of its anion, as summarized in FIGURE 2.26. Dry air contains about 79% nitrogen and 21% oxygen, with small amounts of carbon dioxide, neon, and argon. The following examples will demonstrate how this rule is applied in writing the formula of a compound: 1. Name the acid obtained by adding H+ to the iodate ion, IO3–. All others are inorganic compounds. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Polyatomic ions. (b) The cation is Ba2+, the barium ion, and the anion is OH–, the hydroxide ion: barium hydroxide. For binary ionic compounds (ionic compounds that contain only two types of elements), the compounds are named by writing the name of the cation first followed by the name of the anion. We will also introduce the names of some simple organic compounds in Section 2.9. Naming ionic compound with polyvalent ion. An exception occurs when the compound contains oxygen and chlorine, bromine, or iodine (any halogen except fluorine), in which case oxygen is written last. Practice writing formulas from names and names from formulas using the examples below. 2.8a Name ionic compounds from the systematic IUPAC rules based on the empirical formula; give empirical formulas of named ionic compounds; know the common monatomic and polyatomic ions. The names of compounds with these ions consist of the metal and the anion. The substance on the right is Fe2O3, which contains Fe3+ ions. 4. Prefixes in the anion name are retained in the name of the acid: Figure 2.26 How anion names and acid names relate. Why is CrO named using a Roman numeral, chromium(II) oxide, whereas CaO is named without a Roman numeral, calcium oxide? Write the formula for potassium bromide. When the prefix ends in a or o and the name of the second element begins with a vowel, the a or o of the prefix is often dropped. b. Many complex ions have the general formula NMOm n–, and the names of ionic compounds containing these ions are constructed in the … You should know the Roman numerals for 1 (I), 2 (II), 3 (III), 4 (IV), 5 (V), and 6 (VI). (b) The ending -ite indicates an oxyanion with the same charge but one O atom fewer than the corresponding oxyanion that ends in -ate. In chemical nomenclature, the IUPAC nomenclature of inorganic chemistry is a systematic method of naming inorganic chemical compounds, as recommended by the International Union of Pure and Applied Chemistry (IUPAC). For example, the poison NaCN has the name sodium cyanide. Molecular compounds that contain hydrogen and one other element are an important exception, however. The metals that form only one cation (only one possible charge) are those of group 1A and group 2A, as well as Al3+(group 3A) and two transition-metal ions: Ag+ (group 1B) and Zn2+ (group 2B). c. Cations formed from nonmetal atoms have names that end in -ium: These two ions are the only ions of this kind that we will encounter frequently in the text. All materials on the site are licensed Creative Commons Attribution-Sharealike 3.0 Unported CC BY-SA 3.0 & GNU Free Documentation License (GFDL). The names and formulas of the common anions are listed in TABLE 2.5 and on the back inside cover of the text. Notice that C and N, both period 2 elements, have only three O atoms each, whereas the period 3 elements P, S, and Cl have four O atoms each. Name the ionic compounds (a) K2SO4, (b) Ba(OH)2, (c) FeCl3. If a metal can have multiple charges, the positive charge is indicated by a Roman numeral in parentheses following the name … (c) You must determine the charge of Fe in this compound because an iron atom can form more than one cation. 2. ");b!=Array.prototype&&b!=Object.prototype&&(b[c]=a.value)},h="undefined"!=typeof window&&window===this?this:"undefined"!=typeof global&&null!=global?global:this,k=["String","prototype","repeat"],l=0;lb||1342177279>>=1)c+=c;return a};q!=p&&null!=q&&g(h,n,{configurable:!0,writable:!0,value:q});var t=this;function u(b,c){var a=b.split(". Two HCO3– ions are needed to balance the positive charge of Ca2+, giving Ca(HCO3)2. In this activity, the student will be acquainted with the different metals and nonmetals in the Periodic Table including the noble gases and metalloids. a. b. Most of the compounds are binary compounds, i.e. Organic compounds contain carbon and hydrogen, often in combination with oxygen, nitrogen, or other elements. Give the chemical formulas for (a) silicon tetrabromide, (b) disulfur dichloride. Worked example: Finding the formula of an ionic compound. SAMPLE EXERCISE 2.11 Determining the Formula of an Oxyanion from Its Name, Based on the formula for the sulfate ion, predict the formula for (a) the selenate ion and (b) the selenite ion. a) +2 b) H2SO3 b) +4 c) SO2 c) +4 d) K2S2O4 d) +3 e) Al2S3 e) -2 f) BaS2O8 f) +7 2. The prefix per- indicates one more O atom than the oxyanion ending in -ate; hypo- indicates one O atom fewer than the oxyanion ending in -ite: These rules are summarized in FIGURE 2.24. … The formula for the bromate ion is analogous to that for the chlorate ion. A metal ion, Zn+2 is a metal ion, and they are molecular rather than ionic and anion. And form analogous oxyanions. ) the molecular formula from the name ammonium tell... Chemical combinations of metals and nonmetals ) H2SO3 ) SO2, ( b PCl5! 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