A.Can you show me how to make a 0.1M 250mL buffer solution by 18M H3PO4 (pka...

Question

Question

A.Can you show me how to make a 0.1M 250mL buffer solution by 18M H3PO4 (pka = 2.16) and 0.103M NaOH?

The assigned pH is 2.60. I need the calculation: how many mol of H3PO4 and NaOH needed? How many ml? in 250mL solution.

B.How much 0.1M NaOH should have been required in order to increase the pH of a 25.00 mL sample of your buffer to the pKa + 1 limit.

C.How much 0.1M HCl should have been required in order to decrease the pH of a 25.00 mL sample of your buffer to the pKa − 1 limit.

science chemistry

Answer 1

Answer #1

Answer 2

Similar Homework Help Questions

pka=6.86 Calculations. Preparation of 0.1M phosphate buffer pH=74 1. Calculate the amount mL this buffer. O...

pka=6.86 Calculations. Preparation of 0.1M phosphate buffer pH=74 1. Calculate the amount mL this buffer. O of NaH2PO4 (MW=120g/mol) you will need to prepare m 100 added to prepare 100ml of phosphate buffer 2. Calculate how many ml of 1M NaOH must be at pH=7.4. MOOS. O Imo.ea gnizim vd som slud 1096 MOOS.O ses to Horse Snodulo bios MOOS.Os lo Im 0.0a bris not to muit
1) Suppose you have 50ml of a 0.1M acetate buffer with a pH of 4.37 and a pka of 4.73 which has been treated with 2...

1) Suppose you have 50ml of a 0.1M acetate buffer with a pH of 4.37 and a pka of 4.73 which has been treated with 2.4 ml of 0.5M Sodium Hydroxide (NaOH). Calculate the theoretical change in pH following the addition of this base.
Question 4. a.) Calculate the pH of a solution initially 0.1 M in acetic acid and 0.02 M in sodium acetate. The pKa for acetic acid is 4.76. b) Calculate the pH of the buffer if you add 10 ml of 0.1M...

Question 4. a.) Calculate the pH of a solution initially 0.1 M in acetic acid and 0.02 M in sodium acetate. The pKa for acetic acid is 4.76. b) Calculate the pH of the buffer if you add 10 ml of 0.1M HCl to 100 ml of the buffer in part a.

1. How many grams of pure, solid NaOH are required to make 400 mL of 0.1M NaOH solution? 2. How many grams of a sol...

1. How many grams of pure, solid NaOH are required to make 400 mL of 0.1M NaOH solution? 2. How many grams of a solution that is 50% by weight NaOH is required to make 400 mL of 0.1M NaOH solution? 3. The density of a 50% solution of NaOH is 1.525 g/mL. What volume of a solution that is 50% by weight NaOH is required to make 300 mL of 0.1M NaOH solution? 4. Why does weighing by difference...
Create a buffer solution such that the pH=pKa, by adding half the amount of 1.00 M...

Create a buffer solution such that the pH=pKa, by adding half the amount of 1.00 M NaOH (prepared from the 6M NaOH provided in your kit) needed to reach the endpoint of 10 mL of vinegar. HELP!! How much do I mix together
Please Answer the Following Questions (#1-4) #1 You are proved a buffer whose acid pKa is...

Please Answer the Following Questions (#1-4) #1 You are proved a buffer whose acid pKa is 6.17 and solutions of 1M Hal and 1M NaOH. The initial pH of this buffer is 5.24. Calculate how many milliliters of Hal or NaOH are required to alter the buffer's pH to 6.65 and assume that [HA] and [A-] concentration are in mol units. #2 You are given a 25mL sample of weak acid (HA) of concentration 0.153M, with a Ka of 5.6*10-7...

5. How many mL of 0.100 M NaOH S produce a buffer pH 4.07 pka acetic...

5. How many mL of 0.100 M NaOH S produce a buffer pH 4.07 pka acetic acid = 4.757. ANSWER: 112 mL nl of 0.100 M NaOH should be added to 500.0 mL of 0.150 M acetic acid to
Hello, I will try this again I am trying to prepare a buffer from a solution...

Hello, I will try this again I am trying to prepare a buffer from a solution of a weak acid. This is for part D. of Experiment 25 - Ph Measurements - buffers and their properties I am to be give an 0.50 M solution of weak acid with a given pKa, and I will preparre a buffer of a desired pH measurement (choose any pH) I must first dilute the acid solution to 0.10 M by adding 10 ml...
A chemist needs to make a buffer solution with a pH of 4.25 with a solution...

A chemist needs to make a buffer solution with a pH of 4.25 with a solution that currently contains 465 mL of 0.0941 M NaOH. The chemist plans to use acetic acid as the weak acid in the buffer. a) what should be the molar ratio of conjugate base to weak acid in the buffer solution? b) how many moles of acetic acid would need to be added to neutralize all of the sodium hydroxide? c) how many moles of...

You need to prepare 100.0 mL of a pH=4.00 buffer solution using 0.100 M benzoic acid...

You need to prepare 100.0 mL of a pH=4.00 buffer solution using 0.100 M benzoic acid (pKa = 4.20) and 0.240 M sodium benzoate. How much of each solution should be mixed to prepare this buffer? You need to prepare 100.0 mL of a pH-4.00 buffer solution using 0.100 M benzoic acid (pKa 4.20) and 0.240 M sodium benzoate. How much of each solution should be mixed to prepare this buffer? Number 31 mL benzoic acid Number 31 mL sodium...