What volume, in mL, of 2.00 M HCl must be added to 1.00 L of a 0.100 M solution of sodium formate, Na+HCOO-, to produce a buffer solution having a pH = 4.00? (Ka HCOOH = 1.9 x 10-4)
E. 3.5
What mass of sodium formate must be added to 550.0 mL of 1.30 M formic acid to produce a buffer solution that has a pH of 3.40 (Ka [HCOOH]) =1.80 x 10 ^-4)?
What volume of 0.200 M HCl must be added to 500.0 mL of 0.250 M NH3 to have a buffer with a pH of 8.81? Ka for NH4+ is 5.6x10-10. Volume =. L
What amount of HCl (at 1.0 M) gas must be added to 1.00 L of a buffer solution that contains [aceticacid]=2.0M and [acetate]=1.0M in order to produce a solution with pH= 3.75?
A chemist prepared an aqueous buffer containing both formic acid (HCOOH) and the formate anion. The volume of the buffer is 100 mL ; with [HCOOH] = 0.110 mol L-1 and [HCOO- ] = 0.101 mol L-1 . The pKa of HCOOH = 3.74. What is the pH of this buffer? Write down the balanced chemical equation that describes the reaction of this buffer when an HCl solution is added. c) What is the resultant pH of this solution after...
How many mL of a 4.00 M HCl solution must be added to 250 mL of a 0.250 M NH3 solution to make a buffer with pH = 9.10? Look up Ka or Kb in a suitable source.
17. What volume of 0.0100 M NaOH must be added to 1.00 L of 0.0500 M HOCI to achieve a pH of 8.00? Ka for HOCI is 3.5 x 10-8 A) 3.9 L B) 1.2 L C) 5.0 L D) 1.0 L E) none of these
Calculate the change in pH when 4.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH, (aq) and 0.100 M in NH Cl(aq). Consult the table of ionization constants as needed. ApH = Calculate the change in pH when 4.00 mL of 0.100 M NaOH is added to the original buffer solution. ApH =
What volume (to the nearest 0.1 mL) of 7.50-M HCl must be added to 0.300 L of 0.150-M K2HPO4 to prepare a pH = 7.50 buffer? (pKa of hydrogen phosphate ion = 12.32)
A student must make a buffer solution with a pH of 1.00. Determine which weak acid is the best option to make a buffer at the specified pH. O propionic acid, K =1.34 x 10 5,3.00 M acetic acid, Ka = 1.75 x 10,5.00 M O formic acid, Kg = 1.77 x 104,2.00 M sodium bisulfate monohydrate, K = 1.20 x 102,3.00 M Determine which conjugate base is the best option to make a buffer at the specified pH. sodium...
How many mL of 0.90 M HCl must be added to 250 mL of 0.280 F sodium formate in order to adjust the pH to 3.50? Formic acid Ka = 1.8x10^-4