Solve #17

B) basic HF a KOH comes together make neutral There is insufficient information provided to answer this question. I need the nu 16. If the pKa of HCHO2 is 3.74 and the pH of an HCHO2/NaCHO2 solution is 3.11, which of the following is TRUE? A) [HCHO ] [NaCHO2 ] 3.74 7 3.11 17. Calculate the pH of a buffer that is 0.225 M HC2H302 and 0.162 M C2H302. The Ka for HC2H302 is 1.8 x 10-5. 0.03645 A) 4.89 PKa + log 9225 B) 9.11 0 142 0.14264 4 C) 4.74 D 9.26 E) 4.60 18. If a chemist wishes to prepare a buffer that will be effective at a pH of 5.5 at 25.C, the best choice would be an acid component with a Ka equal to A) 9.10 x 10-1. B) 9.10 x 10-4