For 270.0 mL of a buffer solution that is 0.245 M in HCHO2 and 0.290 M in KCHO2, calculate the initial pH and the final pH after adding 0.031 mol of NaOH. (Ka (HCHO2) = 1.8 × 10-4.) Express your answers to two decimal places. Enter your answers numerically separated by a comma. pHinitial, pHfinal = ΜΕ ΑΣΦ Submit Previous Answers Request Answer ?

For 480.0 mL of a buffer solution that is 0.120 M in HC2H3O2 and 7.50×10−2 M in NaC2H3O2 , calculate the initial pH and the final pH after adding 1.5×10−2 mol of HCl . ( Ka(HC2H3O2)=1.8×10−5 .)

Given 1.00 L of a solution that is 0.100 M in sodium propionate (NaC3H5O2 ) and 0.300 M in propionicacid (HC3H5O2 ), what is the pH after 0.0400 mole of HNO3 is added? Assume that the volume does notchange upon addition of the HNO 3 . Ka for HC3H5O2 = 1.3 × 10−5

What is the pH of a buffer solution that is 0.10 M chloroacetic acie, HC2H2ClO2 and 0.15M sodium chloroacetate NaC2H2ClO2? The Ka for HC2H2ClO2 is 1.4x10-3. Express your answer to two decimal places.