Multiple choice #1 for exam 1

# Multiple choice #1 for exam 1 - 1 Consider the following...

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_____ 1. Consider the following reaction: 2 Al( s ) + 3 Cl 2 ( g ) 2 AlCl 3 ( s ) The reaction is started by adding 2.00 g of aluminum metal and 3.00 g of chlorine gas to a reaction vessel. What mass of the excess reagent will remain once the reaction has gone to completion? (a) 1.24 g Al (b) 0.859 g Al (c) 2.26 g Cl 2 (d) 1.00 g Cl 2 (e) They are present in the correct ratios, so there will be no limiting or excess reagent. _____ 2. The rate of a zero order reaction: (a) increases as reactant is consumed. (b) is independent of temperature. (c) depends on the concentration of the products. (d) decreases as reactant is consumed. (e) is independent of concentration of reactants or products _____ 3. The following initial rate data were found for the reaction: 2 MnO 4 + 5 H 2 C 2 O 2 + 6 H + 2 Mn 2+ + 10 CO 2 + 8 H 2 O [MnO 4 ] 0 [H 2 C 2 O 4 ] 0 [H + ] Initial Rate (M/s) 1 x 10 3 1 x 10 3 1.0 2 x 10 4 2 x 10 3 1 x 10 3 1.0 8 x 10 4 2 x 10 3 2 x 10 3 1.0 1.6 x 10 3 2 x 10 3 2 x 10 3 2.0 1.6 x 10 3 What is the value of the rate constant? (a) 2.0 x 10 5 M 2 s 1 (b) 200 M 2 s 1 (c) 2.0 x 10 4 M 2 s 1 (d) 100 M 2 s 1 (e) 1.0 x 10 5 M 2 s 1

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For the next two questions, consider the three-step mechanism: i) Ce 4+ + Mn 2+ Ce 3+ + Mn 3+ ii) Ce 4+ + Mn 3+ Ce 3+ + Mn 4+ iii) Tl + + Mn 4+ Tl 3+ + Mn 2+ _____ 4. What is the net overall reaction? (a) Tl + + 2 Ce 4+ Tl 3+ + 2 Ce 3+ (b) 3 Ce 4+ 4 Tl 3+ (c) Tl + + Mn 2+ + 2 Ce 4+ Tl 3+ + 2 Ce 3+ + Mn 3+ (d) Ce 4+ + Mn 2+ + Mn 3+ Tl 3+ + Mn 4+ (e) 2 Ce 3+ + Ce 4+ Tl 3+ + 2 Tl
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Multiple choice #1 for exam 1 - 1 Consider the following...

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