Glucose oxidase has the following rate constants: k1 = 2 x 107 M-1s-1, k-1 1 x 104 s-1, and k2 = 3 × 105 = S-1. If the glucose oxidase concentration is 1 µM, calculate the initial velocity V0 when the glucose is 10 mM.

The solubility product (Ksp) for silver sulfate (Ag2SO4 (s)) is 1.2x10-5. Upon dissolving, Ag2SO4 (s) dissociates into Ag* and SO4²* ions. What will be the activity of Ag2SO4 (s) for a saturated solution at equilibrium, assuming the activity coefficients are all 1.0? Enter your numerical answer in the space available. Show your work on your paper or electronic file. What will be the concentration of Ag* in moles/L for a saturated solution at equilibrium, assuming the activity coefficients are all 1.0?

If the mitochondrial electric potential between the matrix and the intermembrane space were 42 mV, how much ATP could be synthesized from the transport of 4.5 mol H+, assuming the pH difference between the matrix and the intermembrane space is -1.5? Note that the standard Gibbs energy for the hydrolysis of ATP to ADP is -31 kJ/mol.

5. Erina observed that the borax she uses to clean the house is only partially soluble with water. She found on the internet that borax is composed of sodium tetraborate (Na,B,0;(OH), • 8H,0) and wanted to analyze its solubility. The dissolution of borax is: Na,B,0;(OH), • 8H20(9 = 2 Na (aq) + B40;(OH), (aq) + 8 H20o A 50.0 mL saturated solution was prepared for the experiment. After filtering the solution, a 5.00 mL aliquot was transferred to a 25.0 mL Erlenmeyer flask and was titrated using pre-standardized 0.4320 M HCI. The endpoint was reached after the addition of 4.73 mL titrant. Since the tetraborate anion (B,0;(OH),?) is a weak base, the tetraborate ion reacts with HCI by the reaction: B,0,(OH), (aq) + 2 H*(aq) + 3 H,0g = 4 H;BO3(aq) a. Write the K, expression for the dissolution process.

When starting a mixing process, 0.2 moles of copper sulfate and 0.9 moles of NH3 are available, and they are diluted in one liter. Calculate the concentration of Cu2 + in the solution considering the following equilibria: Cư* + NH3 → Cu(NH3)²+ k,=1.1x104 Cu(NH3)²+ + NH3 → Cu(NH3);* k3=2.7x103 Cu(NH3);* + NH3 → Cu(NH3);* k3=6.3x10? Cu(NH3);* + NH3 → Cu(NH3);* ka=30

The mobility of a Li+ ion in an aqueous solution is 4.01×10−8 m2s−1 V−1 at 25°C. The potential difference between two electrodes in the solution placed 1.0 cm apart is 12.0 V. What is the lithium ion current rate? (Use μms-1 for your answer)

calculate the activity of a 0.200molal solution of Cr(NO3)3 if its mean activity coefficient is 0.285

Calculate the Free Gibb’s energy, kJ/mol, for a saturated solution of CdCO3 at 25.0°C. Ksp = 5.2 x 10-12

3+ 35 For the aqueous [Co (NH₂) complex K₁ = 1.58 × 10 at 25 °C. 3+ Suppose equal volumes of 0.0012 M Co(NO3), solution and 0.94 M NH3 solution are mixed. Calculate the equilibrium molarity of aqueous Co³* ion. Round your answer to 2 significant digits. M ? 20 x10 X S 2

Physical Chem #4