Which reaction is autoionization? ( )
A. HCl + H2O ® H3O+ + Cl-
B. H3PO4 + PO43- ® H2PO4- + HPO42-
C. 2HPO42- ® H2PO4- + PO43-
D. 2NO2 ® N2O4
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For which of the equilibria is Kc = Kp? ( )
A. C(s) + CO2(g) ⇌ 2CO(g)
B. Cl2(g) ⇌ 2Cl(g)
C. 2H2(g) + O2(g) ⇌ 2H2O(g)
D. N2(g) + O2(g) ⇌ 2NO(g)
7.81 ( ) = 78.1 ml ( )
A. x10-4 m3
B. x104 mL
C. x 10-1 d3
D. x 106 nL
A mixture of 5.0 ´ 10-5 mol H2(g) and 5.0 ´ 10-5 mol SO2(g) is placed in a 10.0 L container at 25 oC. The container has a pinhole leak. After a period of time, the partial pressure of H2 in the container ( )
A. is less than that of the SO2(g)
B. is equal to that of the SO2(g)
C. exceeds that of the SO2(g)
D. is the same as in the original mixture
For the dissociation reaction 2 H2S(g) « 2 H2(g) + S2(g), Kp = 1.2 ´ 10-2 at 1065 oC. For this same reaction at 1000 K ( )
A. Kc is less than Kp
B. Kc is greater than Kp
C. Kc= Kp
D. whether Kc is less than, equal to, or greater than Kp depends on the total gas pressure.
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