You find 425 ml of 0.350M sodium oxalate in the lab, and you want to use it to make a buffer with a ph of 1.50. What mass of oxalic acid is needed to make this buffer?
You find 425 ml of 0.350M sodium oxalate in the lab, and you want to use...
5. You find 425 mL of 0.350 M sodium oxalate in the lab, and you want to use it to make a buffer with a pH of 1.50. What mass of oxalic acid (MW = 90.03 g/mol, K = 5.9 x 10-2) is needed to make this buffer? (10 pts.) (You can neglect any volume changes due to the addition of solid oxalic acid.)
You want to make 500 mL of 0.400 M sodium acetate buffer pH 4.9. You have 17.5 M acetic acid and sodium acetate. Add 5.55 g of sodium acetate. How much acetic acid to add?
You are working in a lab and need to make a buffer with a pH = 5.50. You have 5.00 M NaOH and 5.00 M HCl available. You observe that malonic acid (HO2CCH2CO2H or H2A) has pK1 = 2.847 and pK2 = 5.696. Given the mass of malonic acid needed from the last problem, how many mL of NaOH solution is needed to give a pH of 5.50 in the buffer solution? Assume that you will make 500. mL of...
Suppose you were asked to make 100ml of an Acetic Acid/Sodium Acetate buffer with a pH of 5.73 and a concentration of 0.1M What mass (in grams) of Sodium Acetate is needed? What volume (in ml) of Acetic Acid is needed
During this part #3 of the lab, you will make 2 acetic acid buffer solutions (HC2H3O2/NaC2H3O2) of the same pH (pH = 4.0), but with different concentration of the components. Use the Henderson -Hasselbalch equation to perform the following calculations. The Ka of acetic acid is 1.8 x 10-5 M. a. Buffer A: Calculate the mass of the solid sodium acetate (NaC2H3O2) required to mix with 100 ml of 0.1 M acetic acid (HC2H3O2), to prepare a pH 4 buffer....
Your lab TA asks you to prepare a buffer solution with a pH of 7.40. The following reagents are all available to you: 550 mL of 0.200 M formic acid, 450 mL of 0.200 M hypochlorous acid, solid sodium formate and solid sodium hypochlorite. a) Which 2 ingredients will you use to prepare the desired buffer? b) What is the base/acid ratio in the desired buffer? c) What mass (in g) of solid base must you dissolve in the corresponding...
what volume of 0.15 M sodium hydrogen oxalate must be added to 20.00 ml of 0.25 M sodium oxalate to produce a solution with a ph of 4.80?
What masses of monobasic and dibasic sodium phosphate will you use to make 250 mL of 0.1 M sodium phosphate buffer, pH = 7?
DATA AND CALCULATION Preparation and Base Buffer Capacity of Buffer A Mass of sodium acetate used 0.3730g Actual pH of the buffer 5.27 Volume of the buffer used in buffer capacity titration 20.0 mL Volume (mL) of standardized NaOH used to change the pH by 1 unit 17.5 mL Concentration of standardized NaOH 0.100M Moles of NaOH needed to change the pH by 1 unit for the buffer 0.00095 mol The buffer capacity as moles of base per Liter buffer...
You are instructed to create 100 mL of a 0.05 M Acetate buffer with a pH of 4.2. You have Glacial Acetic acid (17.4M) and the sodium Acetate NaC2H302, available (Ka=1.8e-5). (Enter all numerical answers to three significant figures.) Copy the results into your lab notebook for use in class. HC2H302(s) + H20(I) = H30+(aq) + C2H302 (aq) What is the molarity needed for the acid component of the buffer? What is the molarity needed for the base component of...