**To receive full credit, you must cite the relevant Ethics Code(s) and include enough detail in your response to completely answer the question (i.e., more than one sentence)** When should treatment be terminated? What factors would you consider? What do you think a therapist should do if a patient wishes to continue in treatment but the therapist judges that the patient no longer needs or is benefiting from it?

Cham spilled oil into the Lake Alice again. If there’s no input to and output from the Lake Alice and we can assume the wind mix the water thoroughly, what assumptions can we make for mass balance?  

Which of the following would be the best buffer system to maintain a solution at a pH of 4.5?

If you decide to remove cadmium by a precipitation process, which is the best target mineral for minimizing cadmium ion concentration in water? Assume the pH will be adjusted to the optimal level.

Assign oxidation state of sulfur in H2S.

If you plan to remove copper ions from acid mine drainage by precipitating them as copper oxide and copper hydroxide minerals through the addition of NaOH, to what pH will you adjust the solution to minimize copper ion concentration?  

If you decide this is the best model for your reaction, what information you can learn from this experiment? Choose all that apply. 

You conducted adsorption experiment and presented your data in Cw (concentration in liquid at equilibrium) and Cs (concentration on adsorbent). Then you wanted to decide which adsorption model describe your data better. To test Langmuir model, what should be your x-axis and y-axis? See the slide note here:  

If you are growing bacteria in a batch reactor and want to know bacteria concentration with time. What assumptions can you make for mass balance? Choose all that apply. 

Match the same reaction kinetics models.