Use the following table to predict the best acid/ base pair for the desired pH/pOH values below (hint: remember buffer range = ± 1 pKa unit). pH = 5.00 What is the best acid/base pair? Name Acid Base pKa Hydrochloric acid HCl Cl- -7.00 Phosphoric acid H3PO4 H2PO4- 2.12 Hydrofluoric acid HF F- 3.18 Lactic acid Lactic acid Lactate 3.85 Acetic acid CH3COOH CH3COO- 4.74 Carbonic acid H2CO3 HCO3- 6.36 Dihydrogen phosphate H2PO4- HPO42- 7.21 Ammonium NH4+ NH3 9.25 Hydrocyanic acid HCN CN- 9.31 Bicarbonate HCO3- CO32- 10.25 Methylammonium ion CH3NH3+ CH3NH2 10.62 Hydrogen phosphate HPO42- PO43- 12.38

Q: Calculate the pH during the titration of 40.00 mL of 0.1000 M HCl with 0.1000 M NaOH solution after…

A: Answer:pH tells about the strength of hydrogen ion concentration in the solution and its value is…

Q: Calculate the pH of a solution prepared by adding 30.0 mLs of 0.20 M HCl to 50.0 mLs of 0.10 M…

A: Given: Concentration of HCl = 0.20 M Volume of HCl solution = 30.0 mL = 0.030 L…

Q: The Ka of hydrocyanic acid (HCN) is 4.0 × 10-10.  - Determine the pH of a 0.300 mol/L solution of…

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A: The neutralization reaction after the addition of strong base results into following changes-

Q: The pH of a buffer can be calculated using the formula: 14-pOH = pKb + log of [proton…

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Q: pH calculation after the second equivalence point:   Calculate the pH of 50.0 mL of 0.250 M oxalic…

A: Answer: This question is based on acid-base titration where base solution is being added into the…

Q: Which acid would be best to use when preparing a buffer with a pH of 4.72? A list of Ka values can…

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Q: Q1// A buffer solution prepared by adding adequate amount of Acetic acid and Sodium acetate to…

A: Firstly we will calculate pH of buffer solution  CH3COOH - CH3COONa CH3COOH (aq) + H2O (l)⇌H3O+​…

Q: You plan to make a buffer solution with sulfurous acid (H₂SO) and it undergoes dissociation reaction…

A: Henderson-Hasselbalch equation is used to prepare a buffer solution of desired pH: Desired pH is…

Q: Which of the following acid/base conjugate pairs could you use to make a buffer solution with a pH…

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Q: What is the pH of a buffer solution that is 0.20 M propionic acid, HC3H5O2 and 0.16 M sodium…

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Q: Which of the following combinations would be the best to buffer the pH of a solution at…

A: pH range or buffer capacity of a buffer = pKa±1.

Q: Use the Ka values for weak acids to identify the best components for preparing buffer solutions with…

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Q: Select the mixture which is capable of tolerating the addition of a strong acid without altering the…

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Q: Formic acid, HFor, has a Ka value of 1.8 x 10^-4. You need to prepare a buffer having a pH of 3.25…

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Q: The Ka of hydrocyanic acid (HCN) is 4.0 × 10-10.  Determine the pH of a 0.300 mol/L solution of…

A: Ka = 4.0 × 10-10 Concentration of acid = 0.300M HCN ⇌ H+(aq) + CN-(aq) Let assume x is the…

Q: 1) Identify the solutions that would make an effective buffer. NACN/HCN HI/KI HC,HO,NaC,H,O, CH,NH/…

A: A buffer solution is made of a weak acid or base and its conjugate base or conjugate acid. Strong…

Q: Calculate the pH of a buffer solution prepared from 1.55\times 10^-5 mol of phosphoric acid,…

A: Step 1: A solution that contains a weak acid and its conjugate base is an acidic buffer solution. To…

Q: by the addition of strong base in a buffer, pH of the solution is maintained by?  1- Shifting…

A: Given ,  By the addition of strong base in a buffer, pH of the solution is maintained by?  1-…

Q: You need to prepare a buffer solution from NaH2 PO4 and Na, HPO4 to have a pH of 8.00. What ratio of…

A: Ratio of amounts of weak acid and it's conjugate base required can be calculated using Henderson…

Q: 30 mL of 0.1 M HCI is titrated with 0.1 M CH3NH₂ (Ka = 2.0 x 10-11) solution. Calculate the pH after…

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Q: A solution is prepared at 25 °C that is initially 0.077M in trimethylamine ((CH³)¸N), a weak base…

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Q: The pH of blood plasma is 7.40. Assuming that the principal buffer system in blood is HCO, /H2CO3,…

A: Given,  pH of blood plasma = 7.40

Q: Calculate the pH of a buffer solution prepared by dissolving .37 moles of formic acid (HCO2H) and…

A: Answer: Buffer solution is a type of solution that resists the change in its pH on adding small…

Q: If the dissociation constant of a weak acid is 8.1 x 100, at what ratio should you adjust the…

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Q: Calculate the pH of each of the following buffered solutions.            Ka of acetic acid = 1.8 x…

A: Since you are asked for multiple sub parts, we are entitled to solve first three only.

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.