How many grams of sodium fluoride should be added to 40.0 mL of 0.223 M hydrofluoric acid solution to produce a buffer of pH 4.70 with a total diluted volume of 500. mL?  The Ka for hydrofluoric acid is 7.20x10-4. Group of answer choices 0.0103 g 0.129 g 13.6 g 27.2 g 170. g

Q: pH Measurement and Buffer Q1.Substances    pH value at 25°C     [H+] (mol dm-3)   vinegar…

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: What is the pH of 100 mL100 mL of a buffer that is 0.5 M HCNO0.5 M HCNO and 0.5 M CNO−0.5 M CNO−…

A: Given,     Molarity of HCNO=0.5M     Volume of HCNO solution=100mL     Molarity of CNO-…

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A: • For best buffer, moles of KClO and moles of HClO  should be the same. • Let moles of HClO an moles…

Q: 50.0 mL of a monoprotic weak acid is titrated with 0.0560 M NAOH.The equivalence point was found at…

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Q: You have a 250 mL sample of 1.28 M acetic acid (Ka = 1.8 ×10–5). Calculate the pH of after adding…

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Q: From the following list, choose 2 reagents and calculate the quantities that are required to make…

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Q: You want to prepare 100.0 mL of a buffer solution with a pH of 4.95 by mixing appropriate volumes of…

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Q: What is the [H3O+] and the pH of a benzoic acid-benzoate buffer that consists of 0.23 M C6H5COOH and…

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Q: A beaker with 1.70x102 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The…

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Q: To a 500 mL of buffer solution consisting of 0.25 M Acetic acid (HAc) and 0.50M Sodium acetate…

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Q: buffer is made of 0.015M sodium formate (HCOONa) and 0.025M formic acid (Ka= 1.77×10^-4) with a…

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Q: mistry graduate student is given 450. mL of a 0.60M propanoic acid (HC,H;CO,) solution. Propanoic…

A: A buffer solution is an aqueous solution. It consists of a mixture of a weak acid and its conjugate…

Q: What is the pH of a buffer prepared by combining 0.76 moles of a weak base, B, with 0.47 moles of…

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Q: Titration of 100.00mL of a 0.1000M solution of a weak acid HA (K 1.30x10) with 0.100M NaOH solution.…

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Q: 2. [A] = day of birth [B] = month of birth I was born December 8th, so for me [A] = 8 [B] = 12 Use…

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Q: What molar ratio of salt to acid would be required to prepare a buffer solution with a pH of 5.9?…

A: Since you have asked multiple question, as per our company guidelines we are supposed to answer the…

Q: 23. How many milliliters of 0.100 M Ba(OH)2 are required to neutralize 20.0 mL of 0.250 M HCl?…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: a) How many grams of sodium acetate, NACH3COO (molar mass: 82.0343 g/mol) should be combined with…

A: The answer to the following question is-

Q: What is the H30* | and the pH of a benzoic acid-benzoate buffer that consists of 0.15 M C6H5COOH and…

A: Given, [C6H5COOH] = 0.15M [C6H5COONa] = 0.38M

Q: you add 1.00 mL of 1.00 M HCl to 100.0 mL of buffer solution that is 0.100 M acetic acid and 0.100 M…

A: Given-> Volume of HCl = 1.00 ml Molarity of HCl = 1.00 M Volume of buffer = 100.0 ml Molarity of…

Q: Calculate the pH of a solution that is 0.20 M HOC1 and 0.92 M KOCI. Ka = 3.5x10-8 pH = 8.16 b In…

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Q: 2. For which of the following will mixing equal volumes result in a buffer? (Choose all that apply.)…

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Q: a)  What is the pH of a buffer prepared by adding 0.506 mol of the weak acid HA to 0.507 mol of NaA…

A: the solution is as follows:

Q: Hydrofluoric acid has a Ka of 6.6 x 10-4. 40.00 mL of 0.150 M sodium fluoride, NaF, is titrated…

A: HF is a weak acid. Its conjugate base is F-.

Q: You wish to prepare a buffer consisting of acetic acid and sodium acetate with a total acetic acid…

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Q: Which of the following acids (listed with Ka values) and their conjugate base should be used to form…

A: Answer: HClO2  Amongst all options, the HClO2 acid and its conjugate is superior choice for the…

Q: What is the pH of a buffer made by combining 45.0 mL of 0.34 M nitrous acid and 60.0 mL of 0.48 M…

A: Answer

Q: 5. Use the titration curve to the right to answer the following questions A. What is the pH at the…

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Q: A 1.0 liter solution contains 0.745 M hydrogen fluoride (HF) and 0.786  M sodium fluoride (NaF).…

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Q: You make a 200mM potassium phosphate buffer (pKa of 7.20) with monobasic potassium phosphate…

A: Given: Concentration of solutes = 200 mM = 0.200 M                                (Since 1 M = 1000…

Q: The Ka of benzoic acid is 6.30x10^-5. The pH of a Buffer prepared by combining 50.0mL of 1.00M…

A: Given information is as follows: The concentration of the Potassium benzoate = 1.00 M The volume of…

Q: You need to prepare 100.0 mL of a pH 4.00 buffer solution using 0.100 M benzoic acid (pK, = 4.20)…

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Q: How many grams of solid potassiumfluoride should be added to 2.00 L of a 0.236 M hydrofluoric acid…

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Q: You have 10 mL of a buffer that is 0.1 M acetic acid and 0.1 M sodium acetate. How many mLs of 0.025…

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Q: In the lab, you have the following chemicals available to you: 1.00M H3PO4, NaHzPO49), NazHPO4(9),…

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Q: What is the pH of a 75.0 mL of a 0.1 M NH3 solution (Kb= 1.8 x 10- 5) when 100.0 mL of a 0.0.75 M…

A: Hello. There are multiple subparts in the question. The first three subparts have been solved. To…

Q: You have a 250 mL sample of 1.28 M acetic acid (Ka = 1.8 ×10–5). Calculate the pH of after adding…

A: The equation used in the formation of buffer is Henderson Hasselbach equation . pH=pKa +…

Q: A buffer is made up of 239mL of 0.187 M potassium hydrogen tartrate (K2HC4H4O6) and 137mL of 0.288 M…

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Q: An aqueous solution contains 0.399 M dimethylamine ((CH3)2NH). How many mL of 0.369 M hydrochloric…

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Q: Design a buffer that has a pH of 6.70 using one of the weak acid/conjugate base systems shown below.…

A: Given: Volume of buffer solution = 1.0 L concentration of weak base = 1.0 M To prepare the buffer of…

Q: A chemistry student is asked to maked a buffer of pH = 4.0. Which of the following acids would be…

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Q: 1.A 25.8 mL aliquot of 0.03 M aqueous hydrochloric acid is titrated with 0.02 M NaOH (ac). What…

A: Interpretation-  To determine the volume (mL) of the base is used when the equivalence point is…

Q: Determine the mass of solid NaCH₃COO that must be dissolved in an existing 500.0 mL solution of…

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Q: A 350.0 mL buffer solution is 0.150 mol L-lin HF and 0.150 mol L-lin • Part A NaF. Ka(HF) = 6.3 x…

A: Given data: Ka = 6.3 × 10-4 pH = 4.0

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.