It is of interest to decide if an analytical separation of the metal ions can be effected by selective precipitation of carbonates from a solution that is 9.09: 10 min me and 0.103 m in ca2+ mnco; caco; k-1.80x101 kp - 3.80109 to analyze this problem, answer the following questions. (1) what carbonate concentration is needed to precipitate 99.9% of the metal that forms the least soluble carbonate? (2) when 99.9% of the least soluble carbonate has precipitated, will all of the metal that forms the more soluble carbonate still remain in solutio yes (3) what is the upper limit on the carbonate ion concentration if the more soluble compound is not to precipitate? (4) if the co, is at this upper limit, what percentage of the metal that forms the least soluble carbonate remains in solution? submit answer 4 question attempts remaining

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).