You need to prepare 3.00 L of a 0.800 M buffer of pH 5.72. The reagents that are available to use are listed in the table below.
|
Sodium acetate (82.0 g/mol) |
|
Malonic acid (104.1 g/mol) |
|
Disodium succinate (162.1 g/mol) |
|
Disodium hydrogen citrate (236.1 g/mol) |
|
HCl (12.0 M) |
|
NaOH (10.0 M) |
Select one combination of these reagents to make your buffer. (1)
Calculate how much of each reagent (and water) you will need to use to make this buffer. Show your work. (5)
You need to prepare 3.00 L of a 0.800 M buffer of pH 5.72. The reagents...
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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...
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You are asked to prepare 500. mL 0.300 M acetate buffer at pH 5.10 using only pure acetic acid (MW = 60.05 g/mol, pKa = 4.76), 3.00 M NaOH, and water. How many grams of acetic acid will be needed to prepare the 500. mL buffer? Note that the given concentration of acetate refers to the concentration of all acetate species in solution. mass: 60 What volume of 3.00 M NaOH, must be added to the acetic acid to achieve...
You are asked to prepare 500. mL of a 0.100 M acetate buffer at pH 5.00 using only pure acetic acid (MW=60.05 g/mol, pKa=4.76), 3.00 M NaOH, and water. Answer the following questions regarding the preparation of the buffer. 1. How many grams of acetic acid will you need to prepare the 500 mL buffer? Note that the given concentration of acetate refers to the concentration of all acetate species in solution. 2. What volume of 3.00 M NaOH must...