CHE 112-Summer 2018 13) Consider the following reaction and its equilibrium cons
ID: 636279 • Letter: C
Question
CHE 112-Summer 2018 13) Consider the following reaction and its equilibrium constant: SO2(g)+NO2(8) so3(g)+ NO(g) Kc 0.33 A reaction mixture contains 0.41 M So2.0.14 M NO2, 0.12 M so3 and 0.14 M NO. Which of the following statements is TRUE concerning this system? t A) The reaction will shift in the direction of reactants. B) The equilibrium constant will decrease. C) The reaction will shift in the direction of products. D) The reaction quotient will decrease. E) The system is at equilibrium. ANS 14) is found in carbonated beverages due to the reaction of carbon dioxide with water A) CH3COOH B) H2CO3 C) HCOOH , D) C6H5???? E) CH3CH2COOH ANS 15) Which of the following is NOT a conjugate acid-base pair? A) NH4+NH3 B) H30+/0H- C) H2S03/HSO3 D) CH3COOH/CH3COO- E) All of the above are conjugate acid-base pairs. ANS 16) Which one of the following is a weak monoprotic acid? A) HCOOH B) H3PO4 c) H2S04 D) H2CO3 ANSExplanation / Answer
13. SO2(g) + NO2(g) --------> So3(g) + NO(g) Kc = 0.33
Qc = [SO3][NO]/[SO2][NO2]
= 0.12*0.14/0.41*0.14 = 0.293
Kc>Qc The equilibrium shift to product side.
C. The reaction will shift in the direction of products>>>>answer
14. Co2 dissolve in water to gives H2Co3
CO2 + H2O -----> H2CO3
B. H2Co3
15.A acid base apir differ in one proton is called conjugate acid-base pairs
B. H3O^+/OH^- >>>.answer
16. HCOOH is monoprotic acid. It is weak acid.
A. HCOOH >>>>answer