Analytical Chemistry, Titrimetric methods of analysis

Module 1 Lesson 29 Card N7 1. What pH indicator is used to determine the endpoint for the titration of acetic acid solution by NaOH solution: A. Titrated without indicator B. Phenolphthalein C. Methyl orange D. Both indicators What is the colour of the titrated solution before and at the end point? Explain 2. Choose a pair of titrants for the quantitative determination of ammonia in a solution by the method of back titration: A. HCI, NaOH B. HCI, H2SO4 C. KOH, NaOH D, NaOH, KCI E. H2SO4, K2SO4 What are the main steps of back titration? Why this type of titration is used for ammonia solution determination? Write the corresponding reactions equations. 3. Calculate the volume of H2SO4 with T(H SO./NaOH) = 0.003025 g/ml what is required to react with 20,00 mL 0,1065 N solution of NaOH. Be sure to write down: 1) what analysis results are given; 2) write the corresponding reactions equations; 3) the mathematical expression of the law of equivalents and use it in solving the problem; 4) perform all calculations with comments; 5) make conclusion