Final answer:
Without the specific pKa values, precise masses of dimethylamine and dimethylammonium chloride for the pH 12.00 buffer cannot be determined from the given information.
Step-by-step explanation:
To find the masses of dimethylamine and dimethylammonium chloride needed to prepare a 5.00 L pH = 12.00 buffer with a total concentration of 0.500 M, you'd need more information about the pKa values of the components involved in the buffer solution. The Henderson-Hasselbalch equation is typically used for buffer calculations, and it involves the pKa of the weak acid and the ratio of conjugate base to weak acid.
Without the pKa values or specific information about the ratio between dimethylamine and dimethylammonium chloride, it's challenging to calculate the exact masses needed. The pKa values are essential as they determine the ratio of conjugate base to weak acid required for a specific pH.
If you have the pKa values for dimethylamine and dimethylammonium chloride, you can proceed with calculations using the Henderson-Hasselbalch equation to determine the ratio and subsequently find the masses of each component needed for the desired buffer solution.
For the summary of "Barren Ground" by David Robertson, chapters 6 and 7, unfortunately, without direct access to the specific content, I can't provide a detailed summary. However, in those chapters, the narrative might delve deeper into character development, plot progression, or thematic elements previously established. Chapters 6 and 7 could introduce new conflicts, resolutions, or further develop the story's central themes. Detailed summaries for these chapters might include character interactions, pivotal events, or shifts in the storyline that advance the overall narrative arc.