Question

5) The Keq for the equilibrium below is 0.112 at 700.0°C 902 (8) 2020) 2503 (8) What is the value of Keq at this temperature for the following reaction? 1502(e) +40268) 2.03 (8) A) 5.60 x 10-2 B) 3.35 x 10-1 C) 1.79 101 D) 0.112 E) 2.99 6) The addition of HCl and to water produces a buffer solution. A) KOH B) HNO3 C) NH3 D) HC6H5OE) KNO3 7) The rate law for a reaction is ratek[A][B] Which one of the following statements is false? A) IFTAJ is doubled, the reaction rate will increase by a factor of 2 B) The reaction is second order in [B]. C) The reaction is first order in [A]. D) k is the reaction rate constant E) The reaction is second order overall 8) 8) The Kh for A™ is 4.9.10-10. What is the pH of a 0.0627 M aqueous Nal solution at 25.0 "C? A) 9.33 B) 1.20 C) 8.75 D) 5.25 E) 10.00 SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 9) The equilibrium-constant expressed as 1/Keg is for a reaction written in the direction. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answer the question. 10) AS is positive for the reaction A) 2503 (8) - 2502 (g) + O2(g) B) CaO (s) + CO2 (g) - CaCO3(s) CN2(g) + 3H2(g) - 2NH3 (8) D) Ag+ (aq) + Cl- (aq) - AgCl (s) E) H20 (1) - H2O (5) B-2

Answer 1

5)

2nd reaction = 1/2 * 1st reaction

So,

Kc1 = (Kc1)^1/2

= (0.112)^1/2

= 3.35*10^-1

Answer: B

6)

HCl is strong acid.

This can be added to NH3 to make some NH4+ in such a way that amount of HCl is less than amount of NH3.

So, final solution would have NH3 and NH4+ which will act as buffer.

Answer: C

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