Answer the following questions about preparing the same buffer solution using three different methods. All three buffers are to have a pH of 9.00. Be sure to show your logic clearly and with all steps in the calculation.
Answer the following questions about preparing the same buffer solution using three different methods. All three buffers are to have a pH of 9.00. Be sure to show your logic clearly and with all steps in the calculation.
a. Given two separate solutions, 0.100 M ammonia and 0.100 M ammonium chloride, calculate the volume of each solution required to form 60.0 mL of a mixture that has the desired pH.
b. Calculate the amount of solid NH4Cl to add to 60.0 mL of 0.100 M ammonia to form a mixture that has the desired pH. Assume no volume change in the solution. Hint: Use the same buffer ratio that you used in (a).
c. Calculate the volume of 0.100 M HCl that is required to react with 50.0 mL of 0.100 M ammonia to form a mixture that has the desired pH. Hint: think of this as a titration problem. Unlike (a) and (b), there IS a reaction between acid and base.
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