What mass of sodium benzoate should you add to 140.0 mL of a 0.13 mol L−1 benzoic acid solution to obtain a buffer with a pH of 4.30? For benzoic acid, Ka=6.3×10−5.
What mass of sodium benzoate should you add to 140.0 mL of a 0.13 mol L−1...
What mass of sodium benzoate should you add to 140.0 mL of a 0.15 mol/L benzoic acid solution to obtain a buffer with a pH of 4.25? For benzoic acid, Ka= 6.3 • 10^-5
What mass of sodium benzoate should you add to 150.0 mL of a 0.14 molL−1 benzoic acid solution to obtain a buffer with a pH of 4.25? For benzoic acid, Ka=6.3×10−5.
Part A What mass of sodium benzoate should be added to 140.0 mL of a 0.15 M benzoic acid solution in order to obtain a buffer with a pH of 4.30? Express your answer using two significant figures.
What mass of sodium benzoate should be added to 140.0 mL of a 0.15 M benzoic acid solution in order to obtain a buffer with a pH of 4.25?
What mass of sodium benzoate (NaC6H5COO, MM = 144.11 g/mol) is required to create a 125. mL buffer with 1.30 M benzoic acid (C6H5COOH, Ka = 6.3 * 10-5) that has a pH = 3.75? Calculate your answer in grams. Round to one decimal place and only input the number value. (Do not add a unit.)
Question 2 What mass of sodium benzoate (NaC6H5COO, MM = 144. 11 g/mol) is required to create a 125. mL buffer with 1.30 M benzoic acid (C6H5COOH, Ka = 6.3* 10-5) that has a pH = 3.75? Calculate your answer in grams. Round to one decimal place and only input the number value. (Do not add a unit.)
Find the pH of a 0.190 M HClO2(aq) solution. For HClO2, Ka=0.011. What mass of sodium benzoate should be added to 150.0 mL of a 0.16 M benzoic acid solution in order to obtain a buffer with a pH of 4.30?
A buffer solution contains 0.41 mol of benzoic acid (HC7H5O2) and 0.43 mol of sodium benzoate (NaC7H5O2) in 2.50 L. The Ka of benzoic acid (HC7H5O2) is Ka = 6.3e-05. (a) What is the pH of this buffer? pH = (b) What is the pH of the buffer after the addition of 0.16 mol of NaOH? (assume no volume change) pH = (c) What is the pH of the original buffer after the addition of 0.05 mol of HI? (assume...
You add 2 mL of 3M HCl to the above benzoate solution and tested the pH was 3.1. Given that the pka of benzoic acid is 4.1, what are the ratios of sodium benzoate to benzoic acid in the reaction? You made a solution of sodium benzoate by dissolving 1.9 grams of sodium benzoate in 20 mL of distilled water. Calculate its molarity. (MW of sodium benzoate is 144 g)
A buffer solution is prepared by dissolving 1.49 g each of benzoic acid, C6H3CO2H, and sodium benzoate, NaC6H; CO2, in 150.0 mL of solution. ( Ka for benzoic acid is 6.3 x 10-5.) a. What is the pH of this buffer solution? pH = b. Which buffer component must be added, and in what quantity, to change the pH to 4.00? e must be added. Quantity = c. What quantity of 2.0 M NaOH or 2.0 M HCI must be...