Initial Cost Estimates For The Iraq War Were Almost Too Low To Believe. The U.S. will shell out somewhere as much as $6 trillion dollars for the Iraq War, once all is said and done, according to a recent report out of Brown University. According to Reuters, that figure includes $1.7 trillion spent so far with an additional $490 billion in benefits.
Best Answer: A solution has the greatest buffering capacity when the concentration of the weak acid is = at the concentration of its conjugate base. In this case i thing that the correct answer is c. Source(s): Dr.A Â· 6 years ago.
Choice of Buffer pH Optimum buffering capacity occurs at a pH equal to the pKa of the buffer. In general, the effective pH range for a buffer is within Â± 1 pH unit of itâs pKa. Table 1 indicates the pH range of some common buffers. The buffer pH should be selected so that it is at least Â± 1 pH units from the pKa of the analyte.