Answers: (a) MgSO4, (b) Ag2S, (c) Pb(NO3)2. Name the ionic compounds (a) K2SO4, (b) Ba(OH)2, (c) FeCl3. Name the following compounds. 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. Naming Binary Compounds Name: _____ Identify the type of binary compound and then write the correct chemical formula for the compound named in each of the following examples. It is published in Nomenclature of Inorganic Chemistry (which is informally called the Red Book). The metals form the cations, and the nonmetals form the anions. Name the anion obtained by removing one oxygen atom from the perbromate ion, BrO4–. The system used in naming substances is called chemical nomenclature, from the Latin words nomen (name) and calare (to call). The system used in naming substances is called chemical nomenclature, from the Latin words nomen (name) and calare (to call). © 2016-2020 All site design rights belong to S.Y.A. The name of the second element is given an -ide ending. inorganic compounds: all other compounds they may contain carbon but most often without … Both substances shown are compounds of iron. 9�B�����f�m(�[,��B7kB�?X���)v}������̡+X��0:7(c�`@J�6^d�@�f���-a�4�+�@3�G����r�h�{ �.u��˳�)��׬��dj5޳���K �L{-j��d5����]ץ��>j��L�0�x�u}�4_e@C��`c@1�x�FH��@�NS��. Write the chemical formulas for (a) potassium sulfide, (b) calcium hydrogen carbonate, (c) nickel(II) perchlorate. Acids containing anions whose names end in -ate or -ite are named by changing -ate to -ic and -ite to -ous and then adding the word acid. 1) Sodium bicarbonate : Baking powder: NaHCO3 2) Copper Sulphate : Blue Vitriol : CuSO4 XH20 3) Calcium Oxychloride : Bleaching powder : CaOCL2 4) Trichloro Methane : Chloroform : CaOCL2 5) Calcium Carbonate : Chalk (Marble) : CaCo3 6) Potassium Hydroxide : Caustic Soda : NaOH 7) Solid Carbondiaoxide : Dry Ice : CO2 8) Magnesium Sulphate : Epsom : MgSO4 9) Caustic Potash : Potassium Hydroxide : KOH 10) Calcium Sulphate : Gypsum : CaSo4 2H2O 11) Ferrous Sulphate : Green Vitriol : FeS… Examples include the name of water, H 2 O, which is dihydrogen monoxide, and the name of NO, which is nitrogen dioxide. Names of ionic compounds consist of the cation name followed by the anion name: In the chemical formulas for aluminum nitrate and copper(II) perchlorate, parentheses followed by the appropriate subscript are used because the compounds contain two or more polyatomic ions. Those of group 7A always have a 1– charge (F–, Cl–, Br–, and I–), and those of group 6A have a 2– charge (O2– and S2–). 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. This online quiz is intended to give you extra practice in naming compounds, writing formulas and calculating molar masses (formula weights). Dry air contains about 79% nitrogen and 21% oxygen, with small amounts of carbon dioxide, neon, and argon. Name the acids (a) HCN, (b) HNO3, (c) H2SO4, (d) H2SO3. Writing Only water solutions of HCN are referred to as hydrocyanic acid. The carbonate ion is CO32–, so the hydrogen carbonate ion is HCO3–. In this section we consider the basic rules for naming inorganic compounds. Organic compounds contain carbon and hydrogen, often in combination with oxygen, nitrogen, or other elements. !b.a.length)for(a+="&ci="+encodeURIComponent(b.a[0]),d=1;d=a.length+e.length&&(a+=e)}b.i&&(e="&rd="+encodeURIComponent(JSON.stringify(B())),131072>=a.length+e.length&&(a+=e),c=!0);C=a;if(c){d=b.h;b=b.j;var f;if(window.XMLHttpRequest)f=new XMLHttpRequest;else if(window.ActiveXObject)try{f=new ActiveXObject("Msxml2.XMLHTTP")}catch(r){try{f=new ActiveXObject("Microsoft.XMLHTTP")}catch(D){}}f&&("POST",d+(-1==d.indexOf("?")?"? Writing Formulas and Naming Compounds - Writing Formulas and Naming Compounds 3-3+ When compounds form, the net charge always equals zero. (e in b)&&0=b[e].o&&a.height>=b[e].m)&&(b[e]={rw:a.width,rh:a.height,ow:a.naturalWidth,oh:a.naturalHeight})}return b}var C="";u("pagespeed.CriticalImages.getBeaconData",function(){return C});u("pagespeed.CriticalImages.Run",function(b,c,a,d,e,f){var r=new y(b,c,a,e,f);x=r;d&&w(function(){window.setTimeout(function(){A(r)},0)})});})();pagespeed.CriticalImages.Run('/mod_pagespeed_beacon','','2L-ZMDIrHf',true,false,'XY2kv0QekUM'); We will also introduce the names of some simple organic compounds in Section 2.9. The formulas of the ions whose names end with -ite can be derived from those ending in -ate by removing an O atom. Among inorganic compounds we will consider three categories of substances: ionic compounds, molecular compounds, and acids. c. Anions derived by adding H+ to an oxyanion are named by adding as a prefix the word hydrogen or dihydrogen, as appropriate: Notice that each H+ added reduces the negative charge of the parent anion by one. Name the compounds (a) SO2, (b) PCl5, (c) Cl2O3. Names and Formulas of Binary Molecular Compounds. [CDATA[ (b) Because NO3– is the nitrate ion, HNO3 is called nitric acid (the -ate ending of the anion is replaced with an -ic ending in naming the acid). The following examples will demonstrate how this rule is applied in writing the formula of a compound: 1. Names and Formulas of Ionic Compounds Recall that ionic compounds usually consist of chemical combinations of metals and nonmetals. The -ate is used for the most common or representative oxyanion of an element, and -ite is used for an oxyanion that has the same charge but one O atom fewer: Prefixes are used when the series of oxyanions of an element extends to four members, as with the halogens. Compounds of carbon are classified as organic when carbon is bound to hydrogen. Ionic compounds are neutral compounds made up of positively charged ions called cations and negatively charged ions called anions. Those on the right side are either polyatomic cations or cations with more than one possible charge. … Most metals that form cations with different charges are transition metals, elements that occur in the middle of the periodic table, from group 3B to group 2B. In this activity, the student will be acquainted with the different metals and nonmetals in the Periodic Table including the noble gases and metalloids. These compounds can be treated as if they were neutral substances containing H+ ions and anions. The metals form the positive ions, and the nonmetals form the negative ions. Common polyatomic ions. Search Search a) +2 b) H2SO3 b) +4 c) SO2 c) +4 d) K2S2O4 d) +3 e) Al2S3 e) -2 f) BaS2O8 f) +7 2. Many important substances that have been known for a long time, such as water (H2O) and ammonia (NH3), do have traditional names (called common names). Examples of binary compounds: NaCl, CO2, NH3, P4O10 A binary ionic compound is an ionic compound in which one element present is a metal and the other element present is a non-metal. Inorganic Acid Names and Formulae Introductory Chemistry Tutorial Key Concepts. In going from the name of an ionic compound to its chemical formula, you must know the charges of the ions to determine the subscripts. The ions on the left side in Table 2.4 are the monatomic ions that do not have more than one possible charge. 1. (Sulfur and selenium are both in group 6A and form analogous oxyanions.). The name of an ionic compound also gives you information about the oxidation numbers of the elements. Naming Inorganic Compounds Introduction . SAMPLE EXERCISE 2.12 Determining the Names of Ionic Compounds from Their Formulas. Thus, you can predict that the substance named hydrogen chloride has the formula HCl, containing one H+ to balance the charge of one Cl–. The pure compound, which is a gas under normal conditions, is called hydrogen cyanide. The Hg22+ ion is unusual because, even though it is a metal ion, it is not monatomic. a. Cations formed from metal atoms have the same name as the metal: //. FIGURE 2.25 can help you remember the charge and number of oxygen atoms in the various oxyanions. 2. Creative Commons Attribution-Sharealike 3.0 Unported CC BY-SA 3.0. … a. Recall from Section 2.7 that ionic compounds usually consist of metal ions combined with nonmetal ions. Thus, the compound is iron(III) chloride or ferric chloride. In order to write a chemical formula, it is important to know the symbol of the elements present in the compound, formula of the radicals and the valency of the elements in that compound. Thus, the HCO3– ion is commonly called the bicarbonate ion, and HSO4– is sometimes called the bisulfate ion. Inorganic compounds include oxides, bases, acids, and salts. b. Formulas of Binary Inorganic Compounds . There are more than 50 million known chemical substances. 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. Although this distinction is no longer pertinent, the classification between organic and inorganic compounds continues to be useful. (b) The ending -ite indicates an oxyanion with the same charge but one O atom fewer than the corresponding oxyanion that ends in -ate. b. 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. (If you thought the compound contained S2– and O2– ions, you failed to recognize the polyatomic sulfate ion.). Start studying Chapter 6: Inorganic and Organic Compounds- Names and Formulas. Practice: Predict the charge on monatomic ions. An exception occurs when the compound contains oxygen and chlorine, bromine, or iodine (any halogen except fluorine), in which case oxygen is written last. In naming ionic compounds, it is important to recognize polyatomic ions and to determine the charge of cations with variable charge. The substance on the right is Fe2O3, which contains Fe3+ ions. ANSWERS: Formula writing and nomenclature of inorganic compounds 1. The compounds consist entirely of nonmetals, so they are molecular rather than ionic. The names and formulas of the common anions are listed in TABLE 2.5 and on the back inside cover of the text. 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