What is the pH of a 0.050 M NH4Cl solution at 25 °C? The Kb…

What is the pH of a 0.050 M NH4Cl solution at 25 °C? The Kb for NH3 is 1.8×10-5. Enter only the final answer in the response box.    Solution steps: Determine the hydrolyzing ion Determine the concentration of the hydrolyzing ion Determine the value of the equilibrium constant of the hydrolysis reaction (Kw=Ka.Kb) Write the hydrolysis reaction Fill the i.c.e. table with known information (initial concentration of the hydrolyzing ion) Label the unknown with “x” and fill the rest of the ice table Write the Ka or Kb expression for the hydrolyzing ion Substitute equilibrium concentrations in the i.c.e. table Check for the simplifying assumption Solve for “x” calculate pH or pOH using final concentration.

Question 4:                                                 …

Question 4:                                                                              (6) Which of the following statements are true about Howie Whelan equations:     They describe the variation in the intensity of the zero beam for change in the excitation error They describe the variation in the intensity of the diffracted beams with thickness for a particular orientation. They describe the variation in the intensity of the zero beam and diffracted beam for a 2-beam geometry They describe the variation in the intensity of the zero beam and diffracted beam for many beam geometry