Quiz 6 Name: _______________________________________ Chemistry 102, Lecture 401 – Fall 2016 DS Section: (1 point) ____________________________ 1. What is one ionic compound that will react with magnesium nitrate? Many answers (here will use sodium sulfide) Complete the table below for this reaction. (5 points) Balanced equations Macroscopic/Particle representation Molecular or total equation: Mg(NO3)2(aq) + Na2S(aq)  MgS(s) + 2NaNO3(aq) Total ionic equation: Mg2+(aq) + 2NO3–(aq) + 2Na+ + S2–(aq)  MgS(s) + 2Na+(aq) + NO3–(aq) Net ionic equation: Mg2+(aq) + S2–(aq)  MgS(s) NO3Na+
MgS
Na+
NO3-
Spectator ion(s): Na+(aq) and NO3–(aq) 2. Not including water, what species are present in an aqueous solution of methyl amine (CH3NH2), a weak base? (1 point) CH3NH2, OH–, CH3NH3+ 3. What are the balanced equations for the reaction of hypochlorous acid (a weak acid) and sodium hydroxide (a strong base)? (2 points) Balanced equations Molecular or total equation: HClO(aq) + NaOH(aq)  H2O(l) + NaClO(aq) Total ionic equation: HClO(aq) + Na+(aq) + OH–(aq)  H2O(l) + Na+(aq) + ClO–(aq) Net ionic equation: HClO(aq) + OH–(aq)  H2O(l) + ClO–(aq) Spectator ion(s): Na+ 4. What is the oxidation number for nitrogen in each substance? (2 points) a. N2O5 +5 c. N2 0 b. NaNO2 +3 d. N2O + 5. What is the reducing agent for the reaction below? (1 point) Fe2O3(s) + 3CO(g)  3CO2(g) + 2Fe(l)