A student needs to prepare a buffer made from HF and KF with pH 3.441. If Ka for HF is 7.20 x 10-4, what ratio of ([HF])/([F-]) is required?

Q: 1. Which of the following would be effective buffers. (circle effective buffers) HCN/NACN desired…

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Q: How many moles of CH₃NH₃Cl  need to be added to 200.0 mL of a 0.500 M solution of CH₃NH₂ (Kb for…

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Q: enzoic acid (HBenz) has a Kvalue of 6.3 × 10-5. You need to prepare a buffer having a pH a of 4.05…

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Q: A student needs to prepare a buffer solution with a pH of 5.59. Assuming a pK a of 4.54, how many mL…

A: Given pKa of HB = 4.54 By using the equation,

Q: What is the pH of 25.00 mL buffer solution which is 2.00M in HC2H3O2 and 2.00M in NaC2H3O2? Ka =…

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Q: Consider a buffer solution comprised of HF and F-. The Ka of HF is 6.3 x 10-4. If the pH of the…

A: Weak acid are those acid which does not dissociate completely in aqueous solution. Here HF is weak…

Q: 3. Which of the following is a good buffer system? a. A solution that is 0.10 M NaCl and 0.10 M HCl…

A: Acidic Buffer solution definition: buffer solution is an aqueous solution consisting of a mixture of…

Q: Consider a buffer made from 255 mL 0.10 M HC,H,O, and 125 mL 0.10 NaC,H,O,. Ka for HC,H,O, is 1.8 x…

A: Given : A buffer solution of HC2H3O2 and NaC2H3O2.

Q: Which of the following would be best for a buffer with a pH of 7.5? a. HF/F- b. H3PO4/H2PO4- c.…

A: The pH of the buffer given is 7.5.

Q: Calculate the pH of a buffer that is 0.200 M H3BO3 and 0.122 M KH2BO3.

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Q: What concentration of NaF do you need to add to a 0.15M HF solution to get a buffer solution pH of…

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Q: A 27.69 mL aliquot of weak acid that has a concentration of 0.648 M will be titrated with 0.33 M…

A: Since, you have posted multiple questions, we will answer the first the first one. If you want any…

Q: 1- Design a buffer that has a pH of 8.06 using one of the weak acid/conjugate base systems shown…

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Q: A buffer was made with HC2H3O2 and its conjugate base. What is the pH of the buffer if at…

A: According to Henderson equation pH= pKa(HC2H3O2)+ log[C2H3O2-1]/ [HC2H3O2]

Q: A buffer is prepared by adding 45 ml of 0.15 M NaF to 35 ml of 0.1 M HF. What is the pH of the final…

A: Given data is as follows:  The volume of NaF=45 mL Concentration of NaF=0.15 M The volume of HF=35…

Q: 12. What volume (in mL) of a 0.150 M Na2SO3 solution must be added to 20.0 mL of a 0.120 M NaHSO3…

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Q: You need to prepare an acetate buffer of pH 5.42 from a 0.774 M acetic acid solution and a 2.96 M…

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Q: Which of the following is the most effective buffer system for a pH value of 6.42? a. H2S/HS (Kal…

A: In this question, we will see the most effective buffer system at given pH. You can see details…

Q: Which action will destroy the buffer solution

A: Buffer is defined as a mixture of weak acid/ conjugate base or weak base / conjugate acid which…

Q: You need to prepare an acetate buffer of pH 5.10 from a 0.707 M acetic acid solution and a 2.07 M…

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Q: What is the pH of a buffer system prepared by dissolving 10.70 grams of NH4Cl and 20.00 mL of 12 M…

A: Mass of NH4Cl = 10.70 g  Molarity of NH3 = 12 M Volume of NH3 = 20 mL = 0.020 L  Volume of buffer…

Q: What the pHof a buffer solution at 25° C if pKb = 6.15 @25°C & if a buffer solution was made by…

A: Given pkb  of RNH2 = 6.15

Q: la Accessibility Mod . a. In a hospital laboratory, a 10.0 mL sample of gastricjuice obtained…

A: Since you have posted multiple unrelated questions, we are entitled to answer the first only.

Q: How much 5.90 M NaOH must be added to 450.0 mL of a buffer that is 0.0215 M acetic acid and 0.0270 M…

A: The volume of 5.90 M NaOH must be added to a buffer solution to raise the pH to 5.75 is to be…

Q: What is the pH of 50.00 mL buffer solution which is 2.00M in HC2H3O2 and 2.00M in NaC2H3O2? Ka =…

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Q: Consider a buffer solution containing a weak acid, HA, and a salt of the weak acid's conjugate base,…

A: Given: buffer solution containing a weak acid, HA, and a salt of the weak acids conjugate base, NA.…

Q: 5,If the pKa of HCN is 9.21 and the pH of an HCN/NaCN solution is 9.23, then______________…

A: Buffer solution: The buffer solution is an aqueous solution consisting of a mixture of a weak acid…

Q: 22. How much sodium formate (HCOONa), in gram, do you need to add to 400. mL of 1.00M formic acid…

A: [Formic acid] = 1.00 M pH of the buffer = 3.5 Ka = 1.77x10-4  Molar mass of HCOONa = 68.01 g mol-1…

Q: Which acid conjugate base pair would be the best choice to make a pH = 4.00 buffer? a.…

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Q: You need to prepare an acetate buffer of pH 5.30 from a 0.712 M acetic acid solution and a 2.18 M…

A: When an "acid and base react" with each other, the product is a "salt and water". This type of…

Q: Which weak acid would be best to use when preparing a buffer solution with a pHpH of 8.50?8.50? an…

A: Value of pKa can be determined using the given formula,

Q: Given 100.0 mL of a buffer that is 0.50 M in HOCl and 0.60  M in NaOCl, what is the pH after 10.0 mL…

A: Given,  Molar concentration of weak acid, HOCl = 0.50 M  Volume of buffer = 100.0 mL = 0.100 L…

Q: Calculate the pH of a buffer consisting of 0.50 ? HF and 0.45 ? F⁻ (a) before and (b) after the…

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Q: As an FDA physiologist, you need 0.250 L of formic acid (HCOOH)–formate (HCOO-) buffer. The pKa of…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Buffer : HC₂0/C₂02- You are trying to create a pH 4.35 buffer using HC2O4- and C2O4-2. The Ka of…

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Q: Starting with 0.0100 mol of KCN and the usual inorganic reagents of the laboratory, How would you…

A: Solution: Here we have 0.0100 mole of KCN. A conjugate strong base of HCN acid ( a weak acid). We…

Q: Consider a buffer made from 255 mL 0.10 M HC2H3O2 and 125 mL 0.10 NaC2H3O2. Ka for HC2H3O2 is 1.8 x…

A: Moles of HC2H3O2 = Molarity × Volume                               = 0.10 M ×0.255 L Moles of…

Q: How much of each solution is needed to prepare 1 L of buffer solution with a pH value of 9.45 using…

A: The question deals with the concept of preparation of  a buffer. A buffer is a solution which resist…

Q: Be sure to answer all parts. What is the [H3O+] and the pH of a benzoic acid-benzoate buffer that…

A: Buffer solution: The solution that resists the change in pH is known as a buffer solution. The…

Q: . what is the volume of the ammonia, in mL needed to prepare the buffer solution? 2. whaw is the…

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Q: How many moles of NaOH need to be added to 200.0 mL of a 0.200 M solution of HF to make a buffer…

A: Buffer solution: The buffer solution is an aqueous solution consisting of a mixture of a weak acid…

Q: The pKa for Tris-H* is 8.08. The concentration of the conjugate acid form of Tris (Tris-H*) in a…

A: The equation will be as follows: tris+H2O⇌(tris-H+)+OH- Calculation of pKb of tris:…

Q: For 280.0 mL of a buffer solution that is 0.315 M in CH3CH2NH2 and 0.220 M in CH3CH2NH3Cl, calculate…

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Q: 3) Suppose 5.00 mL of water, with a pH = 7 (no extra H ions), was accidentally added to a 25.00 mL…

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Q: A 34.8 mL aliquot of weak acid that has a concentration of 0.752 M will be titrated with 0.853 M…

A: Please have a look on the solution below:

Q: Consider a 1.0 L buffer containing 0.093 mol L-1 HF and 0.119 mol L-1 F-. What is the pH of the…

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Q: What quantity in moles of NaOH need to be added to 200.0 mL of a 0.200 M solution of HF to make a…

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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: What ratio of NaCN to HCN is needed to prepare a pH 10.00 buffer? (Ka of HCN is 4.9 × 10⁻¹⁰)

A: Buffer solution: The buffer solution is an aqueous solution consisting of a mixture of a weak acid…

Q: Ka for HPO42- = 4.4 x 10-13. A buffer system of 1.00 mole of Na2HPO4 and 1.00 mole of Na3PO4 to…

A: The weak acid component of the buffer is Na2HPO4 or HPO42-(aq).  The conjugate base component of the…

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.