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Imagine you prepared a buffer solution with a weak acid. See the titration curve below was obtained by adding NaOH to the solution. What is the pKa value of the weak acid added to the solution? 

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 a norovirus decay experiment and obtained norovirus concentrations (c) with time (t) as follows. If you want to see if this decay follows a zero order kinetics model, what should be your x-axis and y-axis? Use the lecture note below if needed. Choose all that apply. Time (t) Norovirus concentration (c) 0 10000 20 100 50 30 100 15

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:  

Match reaction kinetics model and their units.

At pH 7, what is the dominant species of arsenite? 

In the context of the carbonate system, which of the following is a constant if it is the open system?

What is the reaction quotient (Q) for the reaction; H2CO3 = CO32- + 2H+

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 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.