Category: Uncategorized

For the following problem, use a separate sheet of paper to solve the problem. Select your answer from the choices given and then upload your solution at the following link: Unit 2 Exam – Free Response Question  Your work must be shown for full credit.  The answer alone is only worth 1 point.    The decomposition of SOCl2 is first-order with respect to SOCl2. If the half-life for the reaction is 4.1 hr, how long would it take for the concentration of SOCl2 to drop from 0.36 M to 0.045 M?

The following set of data was obtained by the method of initial rates for the reaction: 2 HgCl2(aq) + C2O42-(aq) → 2 Cl-(aq) + 2 CO2(g) + Hg2Cl2(s) What is the value of the rate constant, k?

Consider the reactions of cadmium with the thiosulfate anion.                    Cd2+(aq) + S2O32–(aq)  ↔  Cd(S2O3)(aq)                           K1 = 8.3 x 103                   Cd(S2O3)(aq) + S2O32–(aq)  ↔  Cd(S2O3)22–(aq)          K2 = 2.5 x 102 What is the value for the equilibrium constant for the following reaction?                    Cd2+(aq) + 2S2O32–(aq)  ↔  Cd(S2O3) 22–(aq)

A three-step mechanism has been suggested for the formation of carbonyl chloride:What is the molecularity of the rate-determining step?

Fluorine-18 is an isotope used in Positron Emission Tomography (PET) to scan the brain and follows first-order decay kinetics. If a researcher has 1.50 μg of 18F, how long before it decays to 1.0 ng? The half-life of 18F is 109.8 minutes.

The equilibrium constant, Kp, has a value of 6.5 x 10–4 at 308 K for the reaction of nitrogen monoxide with chlorine.                                    2NO(g) + Cl2(g)  —> 2NOCl(g) What is the value of Kc?

The equilibrium constant, Kp, has a value of 6.5 x 10–4 at 308 K for the reaction of nitrogen monoxide with chlorine.                                    2NO(g) + Cl2(g)  —> 2NOCl(g) What is the value of Kc?

The aquation of tris(1, 10-phenanthroline)iron(II) in acid solution takes place according to the equation: Fe(phen)32+ + 3 H3O+ + 3 H2O → Fe(H2O)62+ + 3 phenH+ If the activation energy, Ea, is 126 kJ/mol and the rate constant at 30°C is 9.8 × 10-3 min-1, what is the rate constant at 50°C?

Hydrogen bromide will dissociate into hydrogen and bromine gases.               2HBr(g) ↔  H2(g) + Br2(g)                                      ∆H°rxn = 68 kJ What effect will a temperature increase of 50°C have on this system at equilibrium?

Nitric oxide reacts with oxygen to form nitrogen dioxide: 2 NO(g) + O2(g) ⇌ 2 NO2(g) What is Kc’ for the reverse reaction if the equilibrium concentration of NO is 0.300 M, O2 is 0.200 M, and NO2 is 0.530 M at 25°C?