1. A mixture is prepared with(CO]-0.035 M, [C2)]-0.015 M, and [cocl] 0.95 M. It
ID: 1034607 • Letter: 1
Question
1. A mixture is prepared with(CO]-0.035 M, [C2)]-0.015 M, and [cocl] 0.95 M. It is known that Ke for the equilibrium CO (g) + Cl2 (g) COCla(g) is 1.2 x 103at 400°C. Predict what will happen. a) The reaction is at equilibrium so no net reaction occurs. b) The reaction occurs in the forward direction. c) The reaction occurs in the reverse direction. d) It is impossible to predict without more information. 2. Which direction will the following reaction (in a 5.0 L flask) proceed if more calcium oxide is added to the system? CaCO3(s) CaO(s) + CO2(g) Kp-1.9 x 1023 a) To the right b) To the left c) The equilibrium position will not shift because calcium oxide is a solid. d) The equilibrium constant gets smaller to reflect the added calcium oxide. e) More information is needed to answer this question. 3. Which of the following pairs of species are conjugate acid/base pairs? a) HCI, HBr b) HI, NaOH c) H2S04, HSO4 d) H30+, ??. e) H3PO4, PO3 4. Which is the strongest acid? a) HOCI b) HOBr c) HOIExplanation / Answer
1. Qc=0.95/0.015×0.035=1.81×10^3
As the value is greater than Kc. The reaction will go backwards. Answer is c.
2. Answer is c. CaO is solid and its concentration is unity in the Kc expression so it will not alter the equilibrium.
3. The H2SO4 will donate one H+ ion. Amd the remaining will be conjugate base and i.e HSO4-. Answer is C.
4.HOCl is most acidic. Because the polarity of O-Cl is most because Cl is most electronegative. Answer is a.
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