how many grams of sodium formate must be dissolved in a 0.300 M solution of formic acid to make 400.0 ml of a buffer solution with a pH=4.60?
how many grams of sodium formate must be dissolved in a 0.300 M solution of formic...
How many grams of sodium formate, NaCHO2, would have to be dissolved in 3.0 L of 0.12 M formic acid (pKa 3.74) to make the solution a buffer for pH 5.30?
How many grams of sodium formate (NaCHO2) need to be dissolved in 179 mL of a 0.89 M formic acid (pKa= 3.75) solution, so that the concentration of formate equals the concentration of formic acid? Report your answer to two (2) decimal places.
Find the mass of sodium formate that must be dissolved in 240.0 cm3 of a 1.2 M solution of formic acid to prepare a buffer solution with pH = 3.60. mNaCOOH=? Thanks!
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)?
Calculate how to prepare 750 ml of 0.25 M sodium formate buffer at pH 4. Use your textbook to determine the molecular weight and pKa of the acid and base. Calculate the grams of sodium formate and number of milliliters of formic acid required. THEN using this stock solution, calculate and describe how you would prepare 100 ml of a 10 mM formate buffer, pH 3.5. By the way, what is the molarity of formic acid? with pH 7.6 and...
Molar Mass question 3. Calculate the quantity, in grams, of formic acid and sodium formate necessary to make 500 mL of a buffer that has a formic acid concentration of 0.75 M and a sodium formate concentration of 0.75 M. You will need to look up or calculate the molar masses of these two compounds as your first step. See question 5 below for their chemical formulas.
inn? 1. Formic acid, (K= 1.8x10) a WA, and sodium formate, its' CB, are mixed together in a 250.0 mL volume of 0.350 M formic acid and 0.455 M sodium formate- to form a buffer solution. a. If 1.00 mL of 1.00 M HCI is added to 250.0 mL of DI water, what is the new pH? What is the pH if the 250.0 mL of solution was only 0.350 M HCOH (no formate)? b. c. What is the pH...
You combine 0.75 moles formate and 0.85 moles formic acid to make a buffer solution. The Ka of formic acid is 1.8xl0'4 what is the pH of the solution? With the same initial solution of 0.75 moles formate and 0.85 moles formic acid to make a buffer solution. The Ka of formic acid is 1.8xl0'4. You add 8g sodium hydroxide to this solution, what is the new pH? With the same initial solution of 0.75 moles formate and 0.85 moles...
4. Briefly explain the meaning of the term buffer capacity". A formic acid/sodium formate solution would be expected to buffer around what pH (use your textbook)? a) Calculate the pH for a solution containing 3.48 M CSHSN and 2.52 M C H NHBr. (Kb - 1.40 x 10" for CsH:N) Calculate the pH after 150.0 mL of 3.16 M HCl is added to 875.0 mL of the solution in part a) above.
5. Determine the pH of a solution of 0.44 mol sodium formate and 0.33 mol formic acid in 3.0 L water (a formate buffer).