During an experiment, a student mixed 14.5 mL of a 0.500 M sodium fluoride solution with 15.6 mL of a 0.750 M hydrofluoric acid solution. The measured pH was 3.24. Calculate the pKa   Calculate the pH of a solution prepared by mixing 20.5 mL of a 0.500 M sodium flouride solution with 32.5 mL of a 0.750 M hydrofluoric acid solution. Use the pKa calculated from question 1.

Q: 10.0 ml of hydrofluoric acid has a concentration of 0.117 M and a Ka of 3.3X10-11. It is titrated…

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Q: 25.0 mL of 2.8 M NH3(aq) was added to 20.0 mL of 1.5 M HCl(aq) and the mixture was stirred, then…

A: The objective of the question is to understand the stoichiometry of the reaction between NH3 and HCl…

Q: Calculate the pH of a buffer solution that contains 0.34M benzoic acid and 0.49 M potassium…

A: Using Henderson equation , we can solve this problem. Here benzoic acid is weak acid and potassium…

Q: The pKa of hypochlorous acid is 7.530. A 59.0 mL solution of 0.133 M sodium hypochlorite (NaOCI) is…

A: Given :- The pka of hypochlorous acid is 7.530. A 59.0 mL solution of 0.133 M sodium hypochlorite…

Q: buffer solution contains 0.440 M CH3NH3Cl and 0.357 M CH3NH2 (methylamine). Determine the pH change…

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Q: The pKa of hypochlorous acid is 7.530. A 54.0 mL solution of 0.125 M sodium hypochlorite (NaOCI) is…

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Q: Calculate the pH of a solution obtained by mixing 50 mL of 0.1 M acetic acid (weak acid) with 50 mL…

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Q: When titrating a weak acid with a strong base, it is found that the equivalence point happens when…

A: equivalence point of any acid base titration is that point where equal no of moles of both the…

Q: A buffer solution was made by mixing equal volumes of 0.20 mol/L solutions of acetic acid and sodium…

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Q: test the pH of a compound NaOH. So they made a solution with some solid NaOH and dissolved it into…

A: pH of solution= 13

Q: 55.00 mL of a solution of 0.1325 M maleic acid is titrated with 0.1000 M NaOH. What Is the pH when…

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Q: Calculate the change in pH when 43.0 mL of a 0.760 M  solution of NaOH is added to 1.00 L of a…

A: The volume of 43 mL is equivalent to 0.043 L. To determine the number of moles (n) of NaOH in the…

Q: Consider the pair of reactions. Draw the organic products, then predict the type of substitution…

A: A question based on reaction mechanism, which is to be accomplished.

Q: made a solution by combining 250.0 mL of a 0.20 M sodium acetate solution with 50.00 mL of 1.0 M…

A: Solution: 250.0 mL of 0.20 M Sodium acetate + 50.00 mL of 1.0 M acetic acid To calculate the final…

Q: Which of the following aqueous solutions are good buffer systems? 0.12 M potassium hydroxide + 0.24…

A: A buffer is more good or more efficient when the amount of acid and its conjugate base or the…

Q: You find a solution that contains exactly 69 mM of a weak base. Adding the conjugate acid (pKa =…

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Q: The pK of hypochlorous acid is 7.530. A 59.0 mL solution of 0.138 M sodium hypochlorite (NaOCI) is…

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Q: A chemist needs a pH 3.5 buffer. Should she use NaOH with formic acid (Kₐ=1.8X10⁻⁴) or with…

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Q: Calculating the pH of a weak base titrated with a strong acid Izabella An analytical chemist is…

A: The question is based on the concept of the pH of the solution.It is defined as a negative logarithm…

Q: Which of the following aqueous solutions are good buffer systems?

A: Buffer solutions:  A solution which resists it's pH by addition of small amount of Strong acid…

Q: Number 2

A: The initial number of moles and molarity of solution is calculated using the mass and molar mass.

Q: 1) Write the equilibrium constant expression for the dissociation of acetic acid

A: Below attached file showing the details answer. All the best.  As per Bartleby answering guidelines…

Q: A buffer is made by mixing 40.00 mL of a 0.100 M solution of the fictitious acid HA (pKa = 5.11)…

A: Given,Molarity of fictitious acid, HA = 0.100 M   ( pKa = 5.11 )volume of HA = 40.00 mLMolarity of…

Q: 400-mL buffer solution is 0.350 M in ammonia (NH3) and 0.350 M in ammonium chloride (NH4Cl).…

A: pH of buffer can be calculated by using Handerson equation. Pkb = -log10(1.76 × 10-5) = 4.75

Q: Anisic acid (HC8H7O3) is found naturally in anise, a well-known culinary herb and flavouring agent.…

A: Given,  Molarity of HC8H7O3 = 0.100 M  Volume of HC8H7O3 = 50.0 mL = 0.050 L Molarity of KOH = ?…

Q: A solution is formed by adding 3.20 grams of solid sodium hypochlorite, NaClO, to 500.0 ml of…

A: Answer: Solution will be basic due to hydrolysis of hypochlorite ion because it is the conjugate…

Q: The pKa of hypochlorous acid is 7.530. A 55.0 mL solution of 0.137 M sodium hypochlorite (NaOCI) is…

A: We have to calculate the pH for the given titration of HCl and NaOCl

Q: An analytical chemist is titrating 185.8 mL of a 0.9600M solution of butanoic acid (HC3H,CO₂) with a…

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Q: The pKa of hypochlorous acid is 7.530. A 58.0 mL solution of 0.126 M sodium hypochlorite (NaOCI) is…

A: According to the question, we have pka = 7.530 The volume of NaOCl = 58 ml Concentration of the…

Q: The pKa of hypochlorous acid is 7.530. A 58.0 mL solution of 0.126 M sodium hypochlorite (NaOCI) is…

A: The balanced equation for the reaction of NaOCl(aq) with HCl is: NaOCl(aq) + HCl(aq) → HOCl(aq) +…

Q: A buffer solution contains 0.424 M KHCO3 and 0.246 M Na2CO3. Determine the pH change when 0.123 mol…

A: pH = pKa + log salt / acid  pH after adding x mole NaOH  pH = pKa + log salt+x / acid-x   ∆ pH = |…

Q: A buffer solution contains dissolved C₆H₅NH₂ and C₆H₅NH₃Cl. The initial concentration of C₆H₅NH₂ is…

A: A solution which is a mixture of weak acid and its conjugate base is known as buffer. For…

Q: A buffer solution was prepared by adding 4.92 g of sodium acetate, NaCH3CO2, to 2.50 x 10^2 mL of…

A: The objective of this question is to calculate the pH of a buffer solution after adding a certain…

Q: You are working in a lab and someone has just handed you a beaker filled with 110 ml of a mysterious…

A: pH of a buffer is calculated using Hasselbach Henderson equation: pH =pKa+log([Conjugate…

Q: Lactate is an important component in some intravenous solutions. Given pKa = 3.86 for lactic acid,…

A: pH = pKa  +  log ( [ conjugate base ]/[weak acid] ) ---------(i) pKa = 3.86 ( given) HC3H5O3…

Q: If I have a buffer solution made up of 45.0 mL of 0.500 M sodium acetate (NaCH3COO) and 5.0 mL of…

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Q: 0.336 M CH3NH3Br and 0.344 M CH3NH2 (methylamine). Determine the pH change when 0.078 mol NaOH is…

A: Buffer is prepared by weak acid or weak base with its conjugate base or acid ...

Q: Calculate the pH at the following points in a titration of 40.0 mL of 0.100 M barbituric acid (Ka =…

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Q: Which of the following aqueous solutions are good buffer systems? O 0.22 M hydroiodic acid + 0.23 M…

A: Buffer solution is solution in which weak acid or weak base present with their conjugate acid or…

Q: A chemist titrates 90.0 mL of a 0.4988 M butanoic acid equivalence. The pK of butanoic acid is 4.82.…

A: INTRODUCTION: Hydrolysis of salt: The incident of interaction between cation and anions of the salt…

Q: An analytical chemist is titrating 159.5 mL of a 1.200 M solution of nitrous acid (HNO,) with a…

A: The is a neutralization reaction which takes place as,…

Q: The pH of a bicarbonate-carbonic acid buffer is 6.18. Calculate the ratio of the concentration of…

A: The ratio of [H2CO3] to that of [HCO3-] is determined by using Henderson-Hasselbalch equation.

Q: Chemistry A technician in a hospital laboratory obtained a 5.0 mL sample of gastric juice taken from…

A: Answer: Gastric juice contains HCl acid, therefore this question is based on acid-base titration.

Q: You are running a titration.  You have placed 40.0 mL of 0.200 M chlorous acid, HClO2, in a flask…

A: This question can be solved using Henderson-Hesselbech equation.

Q: A 25.0 mL sample of a  0.100 M  solution of acetic acid is titrated with a  0.125 M  solution of…

A: Find the moles of acetic acid. 20 mL of 0.125 M NaOH is added to the solution. Now find the number…

Q: What is the pH of a buffer solution if you dissolve 300 ml of 1.65M Formic Acid (HCO2H) and 250 ml…

A: Given -> Volume of formic acid = 300 ml  Molarity of formic acid  = 1.65 M = M1 Volume of sodium…

Q: A 0.0420 L volume of 0.11 M hypobromous acid (HBrO), a weak acid with Ka = 2.8 ✕ 10−9, is titrated…

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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.