Review for exam 1

Review for exam 1 - Exam 1 outline: (1). True/false (2)....

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Exam 1 outline : (1). True/false (5 questions; ~10 pts) (2). Multiple choice (7 questions; ~21 pts) (3). Match the correct answer (6 questions; ~12 pts) (4). Greater than, less than or equal to (6 questions; ~12 pts) (5). Problems (~45 pts) What is provided ? (1). Periodic table (2). Constants (R value etc) What you need to bring? (1). A fresh mind (2). Pencils and erasers (3) Calculator without any stored information Exam rooms Students with last names beginning A-M: SC4327 Students with last names beginning N-Z: SC5211 Students of Muslim faith practicing Ramadan : SC5326 from 8-10 PM (contact Engineering Dean John Veillette) john.r.veillette@vanderbilt.edu Students approved by ODC for time and half : SC5502 from 6-9 PM
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Covalent (molecular) compounds : contain molecules where atoms are connected to each other through covalent bonds. A covalent bond is formed when electrons are shared between atoms. Ex: H 2 O, CO 2 , H 2 O 2 ) Ionic compounds : contain oppositely charged ions held together through ion-ion attractive interactions. A positively charge ion is called cation and negatively charged ion is called anion . Example: NaCl (cation:Na + ;anion: Cl - ) Molecular formula : gives exact composition of atoms of each kind in a molecule. (glucose: C 6 O 6 H 12 ) Empirical formula : gives relative number of atoms of each kind as smallest integers. Structural formula : specifies the connectivity between atoms of a molecule.(example: structural formula of H 2 O 2 is: H-O-O-H) Chapter 3 What is empirical formula of glucose ? COH 2
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roup I metals form only one type of ions with +1 charge. roup II metals form only one type of ions with +2 charge. luminum in Group III forms only one type of ion with +3 charge. or ions of these metals the name of the cation is same as that of metal. xample: the name of Mg 2+ is magnesium ion If a metal forms more than one kind of charged ion, the preferred ion name is the element name followed in parentheses by the roman numeral representing the positive charge of the ion . Example: Cu 2+ is copper (II) For monoatomic anions, the ion name starts with element name and ends with . .ide. Example: the name of F - is Fluoride ion For polyatomic or molecular anions, the ion names vary and have to be remembered. For oxyanions with elements that form two types of anions use the suffix -ate and –ite. Example: ClO 3 - is chlorate ion; ClO 2 - is: Chlorite ion For oxyanions with elements that form more than two types of anions, use the additional suffixes -hypo and –per. Example:ClO 4 - is perchlorate ion; ClO - is hypochlorite ion Naming of anions : oxyanions
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Example: Match the following: Nitrate ion Nitrite ion Sulfite ion SO 4 2- CO 3 2- NO 2 - NO 3 - SO 3 2-
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The cation name is written first followed by the name of anion. (1). Chemical formula and names are written with more electropositive element first . Example: for SO 2 , the name starts with sulfur (2). Write the formula or name of element with smallest group number first. If two elements lie in the same group, then write the element with greatest row number first. The prefix associated with an element identifies the number of atoms of present.
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Review for exam 1 - Exam 1 outline: (1). True/false (2)....

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