Question: A certain indicator HIn has a pKa of 3 00 and
A certain indicator HIn has a pKa of 3.00 and a color change becomes visible when 7.00% of the indicator has been converted to In-. At what pH is this color change visible?
Answer to relevant QuestionsWhich of the indicators in Fig. could be used for doing the titrations in Exercises 61 and 63? Fig Consider the titration of 100.0 mL of 0.100 M H3A (Ka1 = 5.0 × 10-4, Ka2 = 1.0 × 10–8, Ka3 = 1.0 × 10-11) with 0.0500 M NaOH. a. Calculate the pH after 100.0 mL of 0.0500 M NaOH has been added. b. What total volume of ...The solubility of the ionic compound M2X3, having a molar mass of 288 g/ mol, is 3.60 × 10-7 g/ L. Calculate the Ksp of the compound. Describe how you could separate the ions in each of the following groups by selective precipitation. a. Ag+, Mg2+, Cu2+ b. Pb2+, Ca2+, Fe2+ c. Cl-, Br-, I- d. Pb2+, Bi3+ Tris(hydroxymethyl)aminomethane, commonly called TRIS or Trizma, is often used as a buffer in biochemical studies. Its buffering range is from pH 7 to 9, and Kb is 1.19 × 10-6 for the reaction a. What is the optimum pH for ...
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