Show how would you prepare a solution of 500 ml of a 0.15 M acetate buffer....

Show how would you prepare a solution of 500 ml of a 0.15 M acetate buffer. You have available the following: 6M HCl, 4 M acetic, solid sodium acetate, solid sodium hydroxide

Expert Solution

in the question, pH = 4.6

pH of acidic buffer = pka + log(sodiumacetate/acetic acid)

pka of aceticacid = 4.76

pH = 4.6

no of mol of buffer = 500*0.15/1000 = 0.075 mol

4.6 = 4.76+log(x/(0.075-x))

x = 0.03067 mol

no of mole of sodium acetate = x = 0.03067 mol

mass of sodium acetate must take = x*Mwt

                                   = 0.03067*82

                   = 2.515 g

no of mole of aceticacid = 0.075-x

= 0.075-0.03067

= 0.0443 mol

volume of aceticacid = n/M = 0.0443/6*1000 = 7.383 ml

so that, take 7.383 ml of 6M aceticacid and 2.515 grams of sodium acetate and dissolve it in minimum water,then add water up to 500 ml.

queen_honey_blossom answered 2 years ago

You are asked to prepare 500. mL of a 0.150 M acetate buffer at pH 4.90...

You are asked to prepare 500. mL of a 0.150 M acetate buffer at pH 4.90 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. 2. What volume of 3.00 M NaOH must you add to the acetic acid to achieve a buffer with a pH of 4.90 at a final volume of 500 mL? (Ignore activity coefficients.) Answer is not 14.5

You are asked to prepare 500. mL of a 0.250 M acetate buffer at pH 4.90...

You are asked to prepare 500. mL of a 0.250 M acetate buffer at pH 4.90 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...

You are asked to prepare 500. mL of a 0.200 M acetate buffer at pH 5.10...

You are asked to prepare 500. mL of a 0.200 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. Answer the following questions regarding the preparation of the buffer. What volume of 3.00 M NaOH must you add to the acetic acid to achieve a buffer with a pH of 5.10 at a final volume of 500 mL?

You are asked to prepare 500. mL of a 0.300 M acetate buffer at pH 4.90...

You are asked to prepare 500. mL of a 0.300 M acetate buffer at pH 4.90 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. What volume of 3.00 M NaOH must you add to the acetic acid to achieve a buffer with a pH of 4.90 at a final volume of 500 mL? (Ignore activity coefficients.)

How you would prepare a 500 mL solution of 0.1M "tris" buffer at pH of 7.5...

How you would prepare a 500 mL solution of 0.1M "tris" buffer at pH of 7.5 starting with solid tris free base. The free base has a chemical forumla of (HOCH2)3-C-NH2 and a MW of 121.1 g/mol. The protonated amine form, tris-chloride, has a pKa of 8.10. To prepare the solution, 1.0M HCl will be used.

a)Using a 0.15 M Acetate buffer with a pH of 4.9, you add 0.75 mL of...

a)Using a 0.15 M Acetate buffer with a pH of 4.9, you add 0.75 mL of 0.08 M HCl to 73 mL of the buffer. What is the new pH of the solution? (Enter your answer to three significant figures.) b) Using a 0.15 M Acetate buffer with a pH of 4.9, you add 0.75 mL of 0.08 M NaOH to 73 mL of the buffer. What is the new pH of the solution? (Enter your answer to three significant...

Need to prepare an acetate buffer solution: 25.00 mL of 0.1 M acetic acid and 0.1...

Need to prepare an acetate buffer solution: 25.00 mL of 0.1 M acetic acid and 0.1 M sodium acetate. The stock acetic acid is 6.0 M. The instructions involve the preparation of a (10-fold) intermediate acetic acid solution. Ka = 1.75 x 10-5 (pKa = 4.76). What are the values for the: * volume of acetic acid * grams of sodium acetate (since it's a solid) * volume of DI water needed * calculated pH Thanks.

Describe in detail how you would preapre 100 mL of 0.15 M HEPES buffer at pH...

Describe in detail how you would preapre 100 mL of 0.15 M HEPES buffer at pH 7.30 at room temperature. The pKa of HEPES is 7.55. Prepare the buffer by using the free acid form, and then titrate with a 1.00 M strong acid/base until the desired pH is reached Hints: - Calculate the amount of HEPES free acid that you need to prepare 100 mL of 0.100 M solution using the molecular weight of 238.3 g/mol - Use the...

Describe how to prepare for this desired Tris buffer: 500 ml of 2 M Tris-HCl buffer...

Describe how to prepare for this desired Tris buffer: 500 ml of 2 M Tris-HCl buffer with a pH of 9.2 . The molecular weight of Tris base is 121.14 g/mol.

A 200 ml buffer solution is made up of 0.20 M HClO and 0.15 M NaClO....

A 200 ml buffer solution is made up of 0.20 M HClO and 0.15 M NaClO. What is the pH after 1.71 grams of barium hydroxide is added to solution? (assume no volume change with addition)? HINTS: Ka of HClO is 2.9x108 and barium hydroxide has a molar mass of 171.35 g/mole.

Question