Which of the following statements is/are correct about the graph shown below? The pKa is approximately 8.25 The graph represents a strong acid/strong base titration The pH at the equivalence point in approximately 8.25

What is the pH of a 1 L buffer solution containing 0.502 M diethylamine, (C2H5)NH, and 0.331 M diethylammonium bromide (C2H5)NH2Br?

Comment on the spontaneity of the reaction given:  ΔH = 301.8 kJ and  ΔS = 267.5 J/K The reaction will be spontaneous

Consider the reaction below with Kp = 33.9 at 25o C.  The partial pressure of H2 is measured to be 1.145 atm, partial pressure of F2 is measured to be 1.145 atm, and and partial pressure of HF is measured to be 2.275 atm. Which of the following is true regarding the above system? The reaction proceeds in the forward direction to reach equilibrium The reaction proceeds in the reverse direction to reach equilibrium The reaction is at equilibrium Therefore: 4. The concentration of the reactants will increase, and the concentration of the products will decrease. 5. The concentration of reactants and products will not change. 6. The concentration of products will increase, and the concentration of reactants will decrease.

Which of the following statement(s) is/are correct (true) about a system at equilibrium            X3 (aq) + Z3 (aq) ⇌ 3 XZ (aq)                 K = 6.7 x 10-4 The concentration of the reactants is greater than the concentration of products. The rate of the forward reaction is less than the rate of the reverse reaction. Both the forward and the reverse reactions continue to occur once the system has reached equilibrium.

Which of the following statement(s) is/are correct (true) about a system at equilibrium              X3 (aq) + Z3 (aq) ⇌ 3 XZ (aq)                 K = 1.8 x 103 The rate of the forward reaction is equal to the rate of the reverse reaction. Both the forward and the reverse reactions stop once the system has reached equilibrium. The concentration of the products is greater than the concentration of reactants.

A salt completely dissolves in water and the temperature of the solution increases.  What are the signs of  

The rate constant for a theoretical reaction at 450.0oC is calculated to be 7.0 times the rate constant at 350.0oC. What is the activation energy for this reaction? 

What is the vapor pressure when 4.0 g of nonvolatile compound A (37.5 g mol-1) is added to 735 g of solvent Z (58.2 g mol-1)? Compound A is a not ionic and the pure solvent Z has a vapor pressure of 16.78 mm Hg at 25o

Acme Company is evaluating an investment in new equipment that requires an initial investment of $44,520, generates annual net cash inflows of $10,000, and produces an internal rate of return of 4%. Acme uses an 8% discount rate to make capital budgeting decisions. What is the estimated useful life of the project in years? Round to the nearest whole number and do not enter a percent sign or a decimal point (e.g., enter 89, not 89.0% or 0.89).