E1 - Name: _ Date: _ 1. In the determination of iron in...

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Name: __________________________ Date: _____________ 1. In the determination of iron in vitamins, Fe 2+ is titrated with permanganate, MnO 4 - , in a basic solution. The products of the reaction are Fe 3+ and Mn 2+ . In the balanced equation, the number of electrons transferred is A) 1 B) 10 C) 7 D) 5 2. If the standard potentials for the couples A + /A, B + /B, and C + /C are +2.0 V, +1.0 V, and -0.5 V respectively, which is the strongest reducing agent? A) B + B) C + C) C D) A + E) A 3. Given: Zn(s) + OH - (aq) + H 2 O(l) + NO 3 - (aq) Zn(OH) 4 2 - (aq) + NH 3 (g) If the coefficient of NO 3 - in the balanced equation is 1, how many electrons are transferred in the reaction? A) 8 B) 2 C) 4 D) 10 E) 6 4. In the electrolysis of water both O 2 (g) and H 2 (g) are formed. How many electrons are transferred in the balanced reaction? A) 3 B) 4 C) 5 D) 1 E) 2 Page 1
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5. The standard voltage of the cell is +0.1 V at 25 ° C. Calculate the equilibrium constant for the cell reaction. A)
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E1 - Name: _ Date: _ 1. In the determination of iron in...

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