Quiz7_401 - Quiz7 Name Chemistry102,Lec401Fall2013...

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Quiz 7 Name: ____________________________________ Chemistry 102, Lec 401 – Fall 2013 DS Section: ( 1 point ) _________________________ 1. Complete the table for the combination. 4 points Silver nitrate and lead (in water) Oxidation half reaction Pb(s) Pb 2+ (aq) + 2e Reduction half reaction Ag + (aq) + e Ag(s) Net ionic equation 2Ag + (aq) + Pb(s) 2Ag(s) + Pb 2+ (aq) Oxidizing agent: AgNO 3 (aq) Reducing agent: Pb(s) 2. What is the oxidation state of chlorine in each of the substances? 2 points NaClO 3 +5 Cl 2 0 3. A student assigns the oxidation number of hydrogen in water to be +2. What is wrong with this? 1 point Because we assign oxidation numbers assuming 100% ionic character, we are implying hydrogen has a +2 ionic charge. This would mean hydrogen has lost 2 electrons, but it has only 1. 4. Using a 0.125 M Fe(NO 3 ) 3 (molar mass = 241.88 g mol 1 ), complete the table.
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