40. If you add 8.0 mL of 0.10 M HCl to 25 mL lactic acid/lactate buffer that is 0.10 M lactic acid and 0.12 M sodium lactate, what is the pH? (Ka=1.4x10-4) a. 3.5 b. 3.9 c. 3.7 d. 4.1

Q: Given

A: Buffer acid is HClO : moles of Buffer acid HClO = ( concentration • volume )  moles of Buffer acid…

Q: Design a buffer that has a pH of 9.74 using one of the weak acid/conjugate base systems shown below.…

A:

Q: A buffer contains 0.010 mol of propionic acid (pKa = 4.87) and 0.050 mol of sodium propionate per…

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Q: -9 What mas of A chemistry graduate student is given 125. mL of a 0.20 M pyridine (C,H;N) solution.…

A: The pKb of pyridine can be calculated as follows-

Q: You need to prepare 100.0 mL of a pH 4.00 buffer solution using 0.100 M benzoic acid…

A: Henderson Hasselbalch equation, shown below, where pKa is the equilibrium constant for the acid,…

Q: HEPES is considered a good buffer developed by a scientist of the same name it’s chemical properties…

A: The Henderson-Hasselbalch equation can be written as: pH=pKa +log[Conjugate base][Acid] The general…

Q: of arsenous acid (H3AsO3) and 0.87 mol of sodium dihydrogen arsenite (NaH2AsO3) in 7.30 L. The Ka of…

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Q: Sample student prepares three buffer solutions. Each solution is 1.0 M in one of the acids in the…

A: When NaOH is added to the the buffer solutions , it will react with acidic part of buffer.  So the…

Q: Carbonate buffers are important in regulating the pH of blood at 7.40. If the carbonic acid…

A:

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

A: According to the Bartleby guidelines we have to answer only first three subparts. So please submit…

Q: Calculate the pH of a buffer that is 0.020 M in NH3 and 0.030 M in NH4Cl. What is the pH after…

A: The pH of a solution can be expressed as the negative logarithm of hydronium ion concentration.i.e.,…

Q: A buffer is prepared using 10.00 mL of 3.00 M acetic acid and 20.00 mL of 1,50 M sodium acetate.…

A: We have to calculate the pH of the solution.

Q: Given: The pH of the buffer is 4.88 made by combining 0.500 L of 0.380 M HC3H5O2 (Ka=1.30X10-5) and…

A: The Henderson Hasselbalch equation for acidic buffer is given as :

Q: A buffer is made with sodium acetate (CH3COONa)and acetic acid (CH3COOH); the Ka for acetic acid is…

A: Since the pH of an acidic buffer is given by the Henderson-Hasselbalch equation as pH = pKa + log{…

Q: A buffer with a pH of 11.2 contains CH3NH2 and CH3NH3C1 in water. You may want to reference (Page)…

A: Given: pH of buffer = 11.2 pKb of CH3NH2 = 3.36 And the buffer solution is of CH3NH2 and CH3NH3Cl.

Q: buffer solution was made by adding 2.52 mL of 0.50 M acetic acid and 0.774 g sodium acetate with…

A: Using Henderson Hasselbalch equation we can calculate pH of buffer solution.  pH = pKa + log […

Q: 9. A 350.0-mL buffer solution is 0.150 M in HF and 0.150 M in NaF. What mass of NaOH does this…

A: Concentration of HF = 0.150 M Concentration of NaF = 0.150 M Volume of the buffer = 350.0 mL Ka of…

Q: 2. 100.0 mL of a 0.0875 M weak base solution is titrated with 0.250 M HCI. The pH after the addition…

A: Given,  Concentration of weak base (say B) = 0.0875 M  Volume of B in mL = 100.0 mL  Concentration…

Q: The pKa of a weak acid acid HA is 4.47. Consider the titration of 100 mL of 200 mM HA (aq.) with 200…

A: Weak acid is a an acid that does not dissociates completely in solution rather maintains an…

Q: Devon’s laboratory is out of material to make phosphate buffer. He is considering using sulfate to…

A: When a small amounts of acid or base is added to the solution, the buffer solution shows resistance…

Q: What is the pH of a buffer made by combining 45.0 mL of 0.30 M nitrous acid and 20.0 mL of 0.35 M…

A:

Q: A buffer solution contains dissolved CeH.NH: and C&H&NH:CI. The initial concentration of CeH&NH: is…

A:

Q: Use the Henderson-Hasselbalch equation to calculate the pH of a buffer that is 0.3 M acetic acid and…

A: The given data is as follows: The concentration of acetic acid = 0.3 M The concentration of acetate…

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

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

Q: What mass of NH,CI must be added to 500 mL of a 0.150M NH3 solution to make a buffer with pH = 9.50?…

A: When NH4Cl (salt) and NH3 (weak base) mixed, then they form a buffer solution. The pH of the buffer…

Q: solution is made by mixing 0.250 L of 0.020 mol L-1 acetic acid and 1.10 g of potassium acetate (M =…

A: Here a solution contains 0.25 L of 0.02M acetic acid and 1.10 g of CH3COOK. Ka CH3COOH =1.8×10-5 .…

Q: -10 What A chemistry graduate student is given 125. mL of a 1.70 M hydrocyanic acid (HCN) solution.…

A: when weak acid HCN ionises in water

Q: When each pair of solutions is mixed, which one will not be a buffer? a. 10.0 mL of 0.1 M NaCN mixed…

A: Buffer solution- It is a chemical added during chemical reaction for control of pH of reaction. For…

Q: pH of a buffer

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Q: A buffer solution after the addition of 20.0 mL of 1.00 M NaOH solution to 500.0 mL of a buffer…

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Q: a. Calculate change in pH when 50 mL of a buffer is added with 5 mL of 0.10 M NaOH. The buffer has a…

A: 1) Here we have to determine change in pH when 50 ml of buffer is added with 5ml of 0.1M NaOH…

Q: buffer consists of 0.30 M ethylamine (C2H5NH2) and 0.40 M C2H5NH3Cl. What is the pH after 5.04 g of…

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

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Q: A buffer is prepared to contain 1.00 M acetic acid and 2.00 M sodium acetate. What is its pH? The Ka…

A: Given : [Acetic acid]=1.00 M  [Sodium acetate]=2.00 M  The Ka of acid = 1.77 x 10 -5 pKa=-log Ka…

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: a) Calculate the pH of a solution containing 0.30 M HF and 0.30 M NaF. The Ka for HF is 7.2×10-4.…

A: The pH of a buffer can be calculated by the following formula. pH=pKa + log[conjugate base][acid]

Q: Effect of Buffers o pH A.1 Effect of adding acid pH after 5 drops of HCl pH after 10 drops of HCI…

A: Buffer solution is a mixture of weak acid(CH3COOH) and its conjugate base(CH3COO-) Or vice-versa. It…

Q: A beaker with 1.0 x 10^2 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop.…

A: Given,  Volume of buffer = 1.0 x 102 mL pH of buffer = 5.00  Total molarity of acid and conjugate…

Q: Use the Henderson-Hasselbalch equation to calculate the pH of a buffer that is 0.18 M acetic acid…

A: Acidic buffer :-  A mixture of weak acid and its salt with strong base is known as acidic buffer…

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

A:

Q: Part A A 0.22 - mol sample of a weak acid with an unknown pK, was combined with 10.0 mL of 3.10 M…

A: Buffer solution: buffer solution  is an aqueous solution consisting of a mixture of a weak acid(HA)…

Q: a. Calculate the pH of a buffer that is 0.4 M in acetic acid (CH3COOH) and 0.4 M in potassium…

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

Q: A buffer solution after the addition of 20.0 mL of 1.00 M NaOH solution to 500.0 mL of a buffer…

A: The concentration of acetic acid can be calculated as given below.

Q: A buffer contains 0.175 moles C2H5NH3NO3 and 0.225 moles C2H5NH2 in 800.0 mL water. Kp (C2H5NH2) =…

A: Given: Number of moles of C2H5NH3NO3 = 0.175 moles Number of moles of C2H5NH2=0.225 moles The volume…

Q: 36. How many grams of potassium hydroxide KOH would have to be added to 130 mL of a 0.298 M nitrous…

A:

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…

A:

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: Acetic acid has a Ka of 1.8 x 10-5. Three acetifc acid/acetate buffer solutions, A, B, and C, were…

A:

Q: A buffer solution contains 0.89 mol of phenol (HC6H5O) and 0.86 mol of sodium phenoxide (NaC6H5O) in…

A: The classification of buffers is based on the pH value. When pH comes in 0-7 range, it is named as…

Q: 32 Consider a buffer made by adding 49.1 g of (CH3)2NH2I to 250.0 mL of 1.42 M (CH3)2NH (Kb = 5.4 x…

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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.