Halide complexes of metal M of the form \(\left[\mathrm{MX}_{6}\right]^{3-}\) are found to be stable in aqueous solution. But it is possible that they undergo rapid ligand exchange with water (or other ligands) that is not detectable because the complexes are less stable. This property is referred to as their lability. Suggest an experiment to measure the lability of these complexes that does not employ radioactive labels.
Text Transcription:
[MX_6]^3-
Chemistry 1411 Notes 08/27/18 Measurement Quantitative Observation Has two parts – number and unit Number tells comparison Unit tells scale The number is meaningless without the unit Proper aspirin dosage – 325 (milligrams or pounds) Scientific notation Expresses a number as a product of a number between 110 and the appropriate power of 10 93,000,000 = 9.3 x 10,000 = 9.3 x 10^7 If the decimal point is moved to the left, the power of 10 is positive 345 = 3.45 x 10^2 If the decimal point is moved to the right, the power of 10 is negative 0.0671 = 6.71 x 10^2 2,500 = 2.5 x 10^3 0.036 = 3.6 x 10^2 Converting a number in scientific notation to a standard number When the exponent x is positive, move the decimal point x places to the right 2.800 x 10^2 = 280 Nature of Measurement Quantitate observation consisting of two parts CHEMISTRY 1411 NOTES 09/07/18 Average atomic mass Because of the existence of isotopes, the mass of a collection of atoms has an average value. Boron is 20% 10B and 80% 11B. That is, 11B is 80 percent abundant on earth For Boron mass = 0.20 (10 amu) +0.80 (11 amu) = 10.8 amu Elements and the periodic table The elements in the periodic tale are divided into three groups – metals, nonmetals, and semimetals Metals: - They are located on the left side of the periodic table - They are good conductors of heat and electricity - Metals are shiny solids at room temper
