Redox Reactions CHEM-1070-30
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This 2 page Class Notes was uploaded by Nina Kalkus on Monday October 5, 2015. The Class Notes belongs to CHEM-1070-30 at Tulane University taught by Schmehl, Russell in Fall 2015. Since its upload, it has received 40 views. For similar materials see General Chemistry I in Chemistry at Tulane University.
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Date Created: 10/05/15
Chem Notes 10115 Redox Reactions Half Reaction Method Example 1 V02Mn02 gt V3 M1104 52 42 gt 3 72 oxidant reductant Acidic solution 4H V02 2e39gt V3 2H203 1 M1102 gt M1104 1 3C 1 4H 3V02 ZMHOZ gt 1 3V3 1 2MnO439 Disproportionation Reactions Example 1 2C102 gt 1 C103 32 gt12 52 Ss gt H28 1 SO3 Acidic solution 2H 1 26 1 gt lt0 gt lt1gtlt2gt 3H20 18s8 so 5e39 6H2 0 52 6H20 1 gt 2H 1 2803 Example 2 211 OH gt 2112 H2 Basic solution Zn gt Zn2 26 2H20 ZOH39 26 gt H2 2H20 Zn gt Zn2 H2 2OH39 New problem 4H 1 3V02 ZMHOZ gt 1 3V3 1 2MnO439 Ore 675 g contains M1102 Dissolve the ore in acid and titrate with 015 M VOf 25 mL of V02 are required to completely oxidize the M1102 to MnO439 What is the weight Mn in the ore Moles of V02 needed 015 M0025 L 000375 moles 00037 moles V022 MnOz3 V021 Mn1Mn02549 g Mn1 mole Mn 014 grams weight Mn 014 g Mn675 g ore100 21 Chapter 7 Thermochemistry Open System exchanges heat and matter With the surroundings Ex cars people Closed System exchanges only heat with surroundings Ex radiator Isolated System exchanges neither heat nor matter with surroundings Ex ideal ice chest Energy and Heat are related Energy distanceforce Force massacceleration Acceleration change in velocity over timegt Energy meterskgmeterssecond 2kg mA2secondA2 Joule kinetic energy of motion potential stored energy Connection between energy and heat Temperature change is proportional to the heat change 1 calorie heat required to change the temperature of 1 gram of a system by 1 degree centigrade 1 cal 1 g H20 changing in temp by 1 degree centigrade
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