
AP Chem Unit 1 MC Quiz
Authored by Zachary Pierce
Chemistry
11th Grade
Used 11+ times

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2 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
5 H2O2(aq) + 2MnO4-(aq) + 6H+(aq) --> 2 Mn2+(aq) + 8 H2O(l) + 5 O2(g)
In a titration experiment, H2O2(aq) reacts with aqueous MnO4-(aq) as represented by the equation above. The dark purple KMnO4 is added from a buret to a colorless, acidified solution of H2O2(aq) in an Erlenmeyer flask. (Note: At the end point of the titration, the solution is a pale pink color.)
At a certain time during the titration, the rate of appearance of O2(g) was 1.0 x 10-3 mol/(L•s). What was the rate of disappearance of MnO4- at the same time.
6.0 x 10-3 mol/(L•s)
4.0 x 10-3 mol/(L•s)
6.0 x 10-4 mol/(L•s)
4.0 x 10-4 mol/(L•s)
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
CH3OH(g) --> CO(g) + 2H2(g) DH =+91 kJ/molrxn
The reaction represented above goes essentially to completion. The reaction takes place in a rigid, insulated vessel that is initially at 600 K.
A sample of CH3OH(g) is placed in the previously evacuated vessel with a pressure of P1 at 600K. What is the final pressure in the vessel after the reaction is complete and the contents of the vessel are returned to 600 K?
P1/9
P1/3
P1
3P1
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