Given 0.1 m solutions of na3po4 and h3po4, describe the preparation of 1 l of a phosphate buffer at a ph of 7.5. what are the molar concentrations of the ions in the final buffer solution, including na+ and h+?

answer; i believe that the correct answer is (a); a large rock being weathered by wind and rain;

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.