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UND - CHEM 121 - Study Guide For 11/7 Exam - Study Guide

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UND - CHEM 121 - Study Guide For 11/7 Exam - Study Guide

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background image Study Guide for 11/7 Exam Ionic Compounds:  electrons transferred between atoms Molecular Compounds:  electrons shared between atoms Main group atoms reach “octet” to bond!!! Telling the difference between Ionic + Covalent bonds…... Compounds show different behavior o Properties (formula mass, physical appearance, type of bond,  melting point, boiling point) Gauge sharing with electronegativity o Difference: > or = to 2/Bond Type: Ionic        > 0 and <2/Bond Type: Polar Covalent Naming Compounds from Formulas Binary Naming Rule: prefix + element name; prefix + element name + ide First element – no need for “mono” Examples:  PCl3 = Phosphorous Trichloride  N2O3 = Dinitrogen Trioxide Acids and Bases in Solution…the Arrhenius definitions An  acid is a molecule or polyatomic ion that produces H+ in water. Monoprotic acids: HCl > H+ + Cl­ Strong electrolyte/acid HNO3 > H+ NO3­ Strong electrolyte/acid CH3COOH > H+ + CH3COO­ Weak electrolyte/acid Diprotic acids:
background image H2SO4 > H+ + HSO4 Strong electrolyte/acid HSO4­ > H+ + SO42­ Weak electrolyte/acid Triprotic acids: H3PO4 > H+ + H2PO4­ Weak electrolyte/acid H2PO4­ > H+ + HPO42­ Weak electrolyte/acid HPO42­ > H+ + PO43­ Weak electrolyte/acid Naming Compounds from Formulas… Naming of Acids Monatomic Acid Naming Rule o Hydro ­ <EN> ­ ic acid o HCl = hydrochloric acid Oxoacid Naming Rules o ­ate > ­ ic acid o ­ite > ­ ous acid base is a molecule or ion that produces OH­ in water. (AMMONIA is a WEAK base!) A STRONG acid or base is a molecule or ion that ionizes COMPLETELY in water! Refer to Table 7.3 in textbook Most inorganic acids/bases are STRONG Redox Reactions Reaction by electron transfer REDUCTION: (each O gains 2e­) 2Mg(s) + O2(g) = 2MgO(s)

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School: University of North Dakota
Department: Chemistry
Course: General Chemistry I
Professor: David Pierce
Term: Fall 2016
Name: Study Guide For 11/7 Exam
Description: This study guide will help you understand the concepts covered on the exam on Monday, November 7.
Uploaded: 11/04/2016
4 Pages 42 Views 33 Unlocks
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