Phosphoric acid is a triprotic acid (Kal = 6.9 x 10-3, K2 = 6.2 x 10-8, and Ka3 = 4.8 x 10-13). To find the pH of a buffer composed of H, PO, (aq) and HPO; (aq), which pKa value should be used in the Henderson-Hasselbalch equation? pKal = 2.16 O pKa2 = 7.21 pKa3 = 12.32 Calculate the pH of a buffer solution obtained by dissolving 10.0 g of KH,PO,(s) and 25.0 g of Na, HPO, (s) in water and then diluting to 1.00 L. pH =

Q: A buffer is prepared by mixing 525 mL of 0.50 M HCHO2 and 475 mL of 0.50 M NaCHO2. Calculate the pH.…

A: We can use the henderson hasselbalch equation to calculate the pH of the given buffer solution. On…

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Q: The Ka of hyperchlorous acid, HClO is 3.50 X 10-8. How many grams of NaClO (molar mass = 74.5…

A: Given, Ka of hyperchlorous acid is 3.50 X 10-8 Therefore, pKa = - log(Ka)…

Q: Phosphoric acid is a triprotic acid (Kal = 6.9 × 10, K2 = 6.2 x 10 8, and K3 = 4.8 x 10-13). %3D %3D…

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Q: How many mL of 0.10 M NaOH should a student add to 25.0 mL of 0.10 M HFor to prepare a buffer with a…

A: Given that, 25.0 mL of 0.10 M HF. The Ka of HF is 1.8×10-4. Also, the ratio of [F-]/[HF] = 1.2. The…

Q: The pk, for the acid dissociation reaction of bicarbonate is 10.33. HCO3 (aq) + H2O(1) 2 CO32-(aq) +…

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Q: Sulfate buffer? Your laboratory is out of materials to make phosphate buffer and you are…

A: A buffer solution is formed by the weak acid and its conjugate base or weak base and its conjugate…

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

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Q: A 1.0-L buffer solution contains 0.300 mol acid, HA, and 0.300 mol base, NaA. The value of K, for…

A: Weak acid and its salt with strong base will make a buffer whose PH can  be calculated with the help…

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Q: A 1.0-L buffer solution contains 0.100 mol acid, HA, and 0.100 mol base, NaA. The value of Ka for…

A: # We can calculate the pH of the solution using handerson-hasselbalch equation. # Added acid will…

Q: A buffer is to be prepared from acetic acid (CH3COOH) and sodium acetate (NACH3COO). What ratio of…

A: Correct answer is 100 : 1. pka = -log ka = -log ( 1.82 x 10-5 ) = 5 - 0.26 = 4.74 Henderson equation…

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Q: 2. A solution is 0.10M in Mg(NO3)2. a. What conce ntration of OH is required to just start…

A: (a). Concentration of OH- required can be calculated as:

Q: In the supersaturated solution  Group of answer choices Q = Ksp Q Ksp Ka = Ksp   Calculate the pH…

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Q: The pK, value for HNO, is 3.35. Would a buffer prepared from HNO, and KNO, with a pH of 5.15 be…

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Q: A buffer solution is prepared by dissolving 1.00 g of sodium acetate (CH3COONa) into 100.00 mL of a…

A: Given: The concentration of acetic acid is 0.100M. The volume of acetic acid is 100 mL. The…

Q: A 15.00 ml aliquot of a 0.75 M solution of a weak acid (K, = 1.50E-05 at 25°C) is titrated with…

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Q: What mass (in g) of sodium formate, HCOONa, must be added to 10.0 L of a 0.483 M aqueous solution of…

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Q: For a hypothetical buffer prepared from acid-conjugate base components with pKa of its acid…

A: Given,  pKa of the unknown acid = 4.56  Which pH range would it be expectedly most effective = ?…

Q: A buffer solution contains 0.384 M KHCO3 and 0.239 M Na₂CO3. If 0.0464 moles of potassium hydroxide…

A: The constituents of the buffer solution are: conjugate base, [Na2CO3(aq)] = [CO32-(aq)] = 0.239 M…

Q: The pH of a buffer prepared by adding 0.708 mol of the weak acid HA to 0.305 mol of Na in 2.00 L of…

A: Given,  The pH of a buffer prepared by adding 0.708 mol of the weak acid HA to 0.305 mol of NaA in…

Q: In a titration 2.7 cm33 of 0.100 mol dm−3−3 sodium hydroxide, NaOH solution is added to 25.0 cm33 of…

A: Consider the given information is as follows; The volume of sodium hydroxide (NaOH) = 2.7 cm3=2.7 mL…

Q: 4. You need to make a buffer with pH as close to 10.00 as possible. Two sets of weak acids and…

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

Q: 11) Choose the acid below that would make the most effective buffer for a solution to maintain a pH…

A: The solution is given below -

Q: A 15.00 ml aliquot of a 0.75 M solution of a weak acid (K, = 1.00E-05 at 25°C) is titrated with…

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Q: The desired pH is 6.4 in creating a buffer system/buffer solution of about 50-60mL. Therefore, a…

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Q: Suppose there is 1.00 L of an aqueous buffer containing 60.0 mmol of acetic acid (pKa=4.76) and 40.0…

A: pH = pKa + log [salt]/[acid] pKa = -log Ka Molarity = Number of moles of solute/volume of solution…

Q: A buffer is made using 45.0 mL of 0.750 M HC3H5O2 (Ka = 1.3x10-5) and 55.0 mL of 0.700 M NaC3H5O2.…

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Q: NaF solution added drop wise to 0.0144 M solution in Ba? What is the lowest concentration of F…

A: Hi, since you have posted multiple questions, we will answer the very first question for you. Kindly…

Q: Phosphoric acid is a triprotic acid (Kal = 6.9 × 10-3, K2 = 6.2 x 10-8, and Ka3 = 4.8 x 10-13). To…

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Q: Which of the following would be the best choice for preparing a buffer with a pH = 8.0? Select one:…

A: Buffer solution is a solution in which a weak acid and it's conjugate base is mixed or a weak base…

Q: What is the pH of the buffer that results when 12.3 g of NaH2PO4 and 7.79 g of Na2HPO4 are diluted…

A: Given: Mass of NaH2PO4 = 12.3 g Mass of Na2HPO4 = 7.79 g Molar mass of NaH2PO4 = 120.0 g/mol Molar…

Q: A 100 ml of 0.100 M phosphate buffer solution with a pH of 8.10 is to be prepared by adding 1.00 M…

A: The required pH of the buffer is 8.10, which is closest to the pKa2 value. H2PO4(aq) ⇌ HPO4-(aq) +…

Q: the pH of an acetate buffer prepared by dissolving sodium acetate (5.21 g) and acetic acid (2.19 g)

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Q: 0.2 M acetic acid (pKa = 4.8) and 0.2 M sodium acetate solutions are provided.  Q. Show the…

A: Given : pH of buffer = 4.2 pKa of acetic acid = 4.8  Concentration of acetic acid = 0.2 M And…

Q: What volume of 0.500 M NaOH should be added to 750.0 mL of 0.250 M HCO3- to make a buffer with a pH…

A: Given :-we have to find the volume of 0.5 m NaoH should beadded to 750 mL of 0.25 m H co3- to make a…

Q: What is the maximum volume of 2.1 M NaOH(aq) that the buffer (pH=5.75) prepared from sodium acetate…

A: pH is defined as the determination of the hydrogen ion in the solution

Q: What is the maximum volume of 1.3 M NaOH(aq) that the buffer (pH=5.75) prepared from sodium acetate…

A: Answer: Moles of acetic acid present in buffer solution will be the product of its molar…

Q: The Ka of bromoacetic acid is 2.00 ×10–3. What masses of bromoacetic acid (CH2BrCOOH) and sodium…

A: The buffer reaction is - Given, the total concentration = 0.200 M pH of buffer = 2.100 Volume of…

Q: A 15.00 ml aliquot of a 0.75 M solution of a weak acid (K, = 1.50E-04 at 25°C) is titrated with…

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Q: Calculate the pH of a buffer solution prepared by mixing 25 mL 0.400 M butyric acid, HC4H7O2 and 35…

A: Buffer solution has prepared  by mixing  25 ml acid and 35 ml its salt. Ka for acid is given . We…

Q: Phosphoric acid is a triprotic acid (Ka1 = 6.9 x 10-3, K2 = 6.2 × 10-8, and K,3 = 4.8 × 10-13). To…

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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.