I) The term masking generally refers to (a) removing any material that may interfere with an analysis. (b) the transformation of an interfering species into a form that is not detected. (c) selecting samples from which the identity has been masked. This procedure prevents the analyst from prejudging the outcome of the anal ...continues
Quantitative Analysis : Capillary Zone Electrophoresis, Molar Solubility and Titrations
1. Give an example of an absorption type stationary phase. 3. Explain why at pH around 7, the analyte anions move towards the cathode in capillary zone electrophoresis. 4. The Ksp of La(IO3)3 is 1.0×10-11. Using activities, what is the molar solubility of La(IO3)3 in a 0.050 M solution of NaNO3? 5. Calculate pF ...continues
In the reaction CaCO3 + 2HNO3 → Ca(NO3)2 + CO2 + H2O, how many milliliters of 0.1015 M HNO3 are required to react with 0.9857 grams of CaCO3? Find the fraction of association of a 0.120 molar solution of hydrogen cyanate. Ka for hydrogen cyanate = 3.30×10-4. A sample containing 0.2784 grams of sodium chloride ( ...continues
Calculate the mass (g) of pure Na3AsO4 (s) and volume (mL) of 1.50 M HCl that are required to make 100.0 mL of a buffer solution at a pH of 6.80 and an H2AsO4-(aq) concentration of 0.100 M. The MW of Na3AsO4 is 207.862 g/mol and for H3AsO4, pKa1 = 2.24, pKa2 = 6.96, and pKa3 = 11.50.
