Answered: The addition of 40.0 mL of HCl to 1 L…

The addition of 40.0 mL of HCl to 1 L of 0.5 M phosphate buffer changes the pH from 7.5 to 6.8. What's the molarity of the HCl solution? Phosphoric acid pKas are 2.15, 7.2, 12.4

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter15: Additional Aqueous Equilibria

Section: Chapter Questions

Problem 93QRT: When 40.00 mL of a weak monoprotic acid solution is titrated with 0.100-M NaOH, the equivalence...

See similar textbooks

Related questions

Q: A flask contains 50 mL of a buffer that is 0.1 M in acetic acid and 0.20 M in acetate ion. What will…

Q: 2- one liter of buffer solution contains 0.1 mole of benzoic acid and 0.2 mole of sodium benzoate…

A: Here we are required to find the Change in pH of the buffer solution

Q: In the above buffer preparation, if NaOAs (Sodium acetate) is replaced by 4 M NaOH solution, what is…

A: Volume of buffer solution = 100 mL pH of buffer solution = 4.0 pKa of acetic acid = 4.77 According…

Q: A buffer solution made from HNO2 and KNO2 has a pH of 3.72 . If p Ka for HNO2 is 3.35 , what is the…

Q: At 22 °C, an excess amount of a generic metal hydroxide, M(OH),, is mixed with pure water. The…

Q: A buffer solution is prepared by dissolving 0.200 mol of NaH2PO4 and 0.100 mol of NaOH in enough…

A: pH is used to determine the concentration of hydronium ion.

Q: A flask contains 50 mL of a buffer that is 0.10M in acetic acid and 0.20 M in acetate ion. What will…

Q: What is the pH of a buffer prepared by dissolving 25.0 g of K2HPO4 and 25.0 g of KH2PO4 in 250 mL of…

Q: Phosphate buffer. What is the ratio of the concentrations of H2PO4- H,PO4¯ and HPO42-HPO,²- at (a)…

A: The reaction of the phosphate buffer can be given as: H2PO4(aq)-+H2O(l)⇋H3O+(aq)+HPO4(aq)2- The…

Q: The pKa of acetic acid, HC2H3O2, is 4.74. What is the pH of a buffer in which [HC2H3O2] = 0.20 M and…

A: Solution, which resist in pH change value upon addition of small amount of strong acid or base (less…

Q: If 30 mL of 0.50 M OH- is added to 200 mLs of a 1.5 M buffer (pH 7.4), what is the resulting pH in…

Q: Lactic acid is a weak organic acid and present in both sour milk and buttermilk. It is also a…

A: Given: The number of moles of lactic acid, (C3H6O3)=1 mole. The number of moles of sodium lactate,…

Q: Calculate the pH of a buffer that is 0.12 M in lactic acid and 0.11 M in sodium lactate. (Ka = 1.4 ×…

A: Given :- concentration of lactic acid solution = 0.12 M concentration of sodium lactate = 0.11 M…

Q: Human blood contains one buffer system based on phos-phate species and one on carbonate species.…

A: The pKa values for the phosphate species are 1.89, 6.64, and 11.22, and the pKa values for the…

Q: 22. What ratio of NaCN to HCN is needed to prepare a pH 9.40 buffer? (Ka of HCN is 4.9 × 10⁻¹⁰)

A: To calculate the ratio of NaCN , we would use Henderson-Hassalbalch equation .

Q: pH

Q: A buffer is made up from 0.15 M acetic acid and 0.5 M sodium acetate. What is the pH of the buffer…

Q: Calculate the pH of a buffer system made from 0.500 L of 2.00 M solution of HNO2 and 0.500 L of 2.50…

A: In this question, we want to determine the pH of the buffer solution. How we can calculate the pH…

Q: How many grams of sodium acetate, NaC2H302, would have to be added to 1.0 L of 0.85 M acetic acid…

Q: Shown below is the titration curve for phosphoric acid. What is the composition of a solution of…

A: The question is based on the concept of titrations. we have to identify composition of phosphoric…

Q: The pK₂ value for HF is 3.14. Would a buffer prepared from HF and KF with a pH of 2.64 be considered…

A: Henderson-Hasselbalch equation is used for pH of a buffer solution. pH = pKa + log[conjugate…

Q: you have found the pKa to be 10.3. “Acid-free” paper should have a pH between 8.7 and 10.2. What is…

A: Buffers have applications in manufacturing industries which involves reactions requiring constant pH…

Q: What is the expected pH value when 80 mL of Buffer A is added with 5 mL of 0.2 M HCl. Buffer A has a…

A: From the Henderson-Hasselbalch equation, the pH of the buffer solution is given by: pH = pKa +…

Q: t 22 °C, an excess amount of a generic metal hydroxide, M(OH),, is mixed with pure water. The…

Q: The addition of 40.0 mL of HCl to 1000 mL of 0.5 M phosphate buffer changes the pH from 7.5 to 6.8.…

A: Given: The initial pH of the phosphate buffer = 7.5 Since 7.5 is closest to the pKa2 value of H3PO4,…

Q: 10. What is the pH of a buffer solution that contains 0.245 M weak acid and 0.450 M of the conjugate…

Q: 10) A buffer solution with a volume of 775.0 mL is made with 0.225 mol of HC;H;O2 and 0.100 mol…

A: When NaOH is added to an acidic buffer of acetic acid and sodium acetate, NaOH will react with…

Q: Calculate the pH of a buffer system containing 2.0 M CH3COOH and 2.0 M CH3COOK.The pKa of CH3COOH is…

A: Concentration of CH3COOH=2.0M Concentration of CH3COOH=2.0M pKa of CH3COOH=4.74

Q: A buffer solution is composed of 1.923 g of KH,PO4 and 4.699 g of Na HPO4. (K, for dihydrogen…

A: Given that : Mass of KH2PO4=1.923 gMass of Na2HPO4=4.699 gKa for dihydrogen phsophate=6.2×10-8The…

Q: The pKa of acetic acid is 4.74. What is the pH of a buffer solution that is prepared from 0.010 M…

A: Buffer solution have tendency to resist pH change on addition of small amount of strong acid or…

Q: If [HSO4 ] = .7 M, what [SO42-] is needed to make a buffer of pH 2.2? 0.443 M 0.31 M O.217 M O 2.92…

A: According to your option, the exact answer is not matched. If we choose the option then the close…

Q: What is the pH of a buffer that is 0.12 M HNO2 and 0.16 M NANO2 and the pKa is 3.35?

Q: What is the pH number of a buffer solution prepared from 0.05 M ammonium hydroxide (NH4OH) and 0.09…

A: The Given solution is a Basic buffer solution.

Q: 3) What is the pH of a buffer solution made by adding 0.15 mole of lactic acid HC3H;O, and 0.12 mole…

A: Given, moles of lactic acid = 0.15 mole moles of sodium lactate = 0.12 mole Ka = 1.4 x 10-4 volume…

Q: Calculate the pH of a buffer system made from 75.0 mL of 0.150 M HCHO2 and 50.0 mL of 0.130 M…

Q: What ratio of NaCN to HCN is needed to prepare a pH 9.6O buffer? (Ka of HCN is 4.9 × 10-10)

A: PH of buffer solutionPH = Pka+log10 Salt of that acidAcidHerePH = 9.60ka =4.9×10-10Salt of that…

Q: If the pKa of HCHO, is 3.74 and the pH of an HCHO2/NaCHO2 solution is 3.94, which of the following…

A: Given, pKa of HCHO2 = 3.74 pH of the buffer = 3.94 Weak acid = HCHO2 Conjugate base of HCHO2 =…

Q: What weights of citric acid and/or its various salts are required to prepare 2.0L of a K-citrate…

A: Given as the pH of buffer =6.25 ionic strength= 0.05 M H3C6O7H5 K1 =…

Q: 0.0050 mole of NaOH is added to 0.50L of the buffer solution 0.24 M NH3 and 0.20 M NH4Cl) what is…

Q: What is the pKa of an acid if a buffer made from 0.045 mol of the acid and 0.060 mol of its…

A: The pH is used to determine the acidity or basicity of a solution. The pH of a solution is the…

Q: A buffer consists of 0.50 M NaH₂PO₄ and 0.40 M Na₂HPO₄.Phosphoric acid is a triprotic acid…

A: A buffer solution is prepared by mixing a weak acid and its conjugate base in the aqueous medium.…

Q: If the pKa of HCHO2 is 3.74 and the pH of an HCHO2/NACHO2 solution is 4.15, which of the following…

A: Given: The pKa value is 3.74. The pH of HCHO2/NaCHO2 solution is 4.15.

Q: At 22 °C, an excess amount of a generic metal hydroxide, M(OH)2,M(OH)2, is mixed with pure water.…

A: Given that,PH of the solution = 10.28Ksp =?You know thatPH + POH = 14

Q: What is the pH of a buffer solution consistig of 0.035 M NH3 and 0.050 M NH4 + ? (Ka for HN4+ = 5.6…

Q: The pKa of HF is 3.14. What is the pH of a buffer composed of 0.1 M HF and 1M NaF? 4.14 O 13.13 O…

A: Given: The pKa of HF = 3.14 We have to calculate the pH of the buffer composed of 0.1 M HF and 1 M…

Q: 4. Formic acid, HFor, has a K, value of 1.8 x 10-4. You need to prepare 100 mL of a buffer hay- ing…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: How many grams of solid potassium hypobromite, KBrO must be added to 500.0 ml of 0.500M hypobromous…

Q: You want to make your own buffer solution with a desired pH of 4.2. The systems available to use…

Question

The addition of 40.0 mL of HCl to 1 L of 0.5 M phosphate buffer changes the pH from 7.5 to 6.8. What's the molarity of the HCl solution? Phosphoric acid pKas are 2.15, 7.2, 12.4

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Trending now

This is a popular solution!

Step by step

Solved in 4 steps

SEE SOLUTION Check out a sample Q&A here

Similar questions

When 40.00 mL of a weak monoprotic acid solution is titrated with 0.100-M NaOH, the equivalence point is reached when 35.00 mL base has been added. After 20.00 mL NaOH solution has been added, the titration mixture has a pH of 5.75. Calculate the ionization constant of the acid.
The addition of 40.0 mL of HCl to 1000 mL of 0.5 M phosphate buffer changes the pH from 7.5 to 6.8. What is the molarity of the HCl solution? the pKa’s of phosphoric acid are 2.15, 7.2, 12.4
Human blood contains one buffer system based on phos-phate species and one on carbonate species. Assuming that blood has a normal pH of 7.4, what are the principal phosphateand carbonate species present? What is the ratio of the two phosphate species? (In the presence of the dissolved ions andother species in blood, Kₐ₁of H₃PO4=1.3X10⁻², Kaₐ₂=2.3X10⁻⁷, and Kₐ₃=6X10⁻¹²; Kₐ₁ of H₂CO₃=8X10⁻⁷ and Kₐ₂=1.6X10⁻¹⁰.)
A flask contains 50 mL of a buffer that is 0.1 M in acetic acid and 0.20 M in acetate ion. What will the pH be after 12.0 mL of 0.14 M HCl is added to the buffer? The pKa of acetic acid is 4.74.
The pH of a buffer solution containing 0.35 M acetic acid and 0.39 M sodium acetate where the pKa of acetic acid is 4.75 is_________________
Calculate the pH of a carbonate buffer system that contains 0.0065 M HCO3-, and 0.0084 M 2 CO32-. The Ka of HCO3- is 4.7×10-11
The acid HD has a pKa of 4.64. What volume, in mL, of a 0.100 M solution of sodium hydroxide needs to be added to 40.00 mL of a 0.100 M solution of the acid solution to make a buffer with a pH of 4.91?
What concentration of sodium benzoate must be used to create a buffer solution with a pH of 5.63 if the solution has a concentration of 0.14 M benzoic acid? The Ka of benzoic acid is 6.5 × 10-5.
Shown below is the titration curve for phosphoric acid. What is the composition of a solution of phosphoric acid at pH 2.1? a) 100% H3PO4 b) 50% H3PO4 and 50% H2PO4- c) 100% H2PO4- d) 50% H2PO4- and 50% HPO42- e) 100% HPO42- f) 50% PO43- and 50% HPO42- g) 100% PO43-
The pKa of acetic acid, HC2H3O2, is 4.74. What is the pH of a buffer in which [HC2H3O2] = 0.20 M and [NaC2H3O2] = 0.20 M?
What is the pH of a buffer solution that is 0.159 M in hypochlorous acid (HCIO) and 0.121 M in sodium hypochlorite? the Ka of hypochlorous acid is 3.8x10-8 .