10. What is the pH of a buffer solution that contains 0.245 M weak acid and 0.450 M of the conjugate base? The pka for the acid is 5.53.

Q: A weak acid has Ka of 4.47 x 10-4.  What is pKa for this weak acid?

A:

Q: What is the pKa of a 0.2M solution of an unknown monoprotic acid that has a pH of 4.2?

A: We have find out Pka of solution of an unknown monoprotic acid that has a pH of 4.2

Q: calculate the pH of a solution that is made when 0.10 L of 0.24 M benzoic acid (pKa=4.19) and 0.10 L…

A: The pH can be calculated as,

Q: Determine the pH of the buffer solution produced by the reaction of 5 mL 0.1 M KOH and 30 mL 0.1 M…

A: Chemical equation: CH3COOH (aq) +KOH(aq) ⇌ CH3COOK (aq) + H2O (l)

Q: In titrating 10 ml of 0.1 N HA (pKa-4),the pH after the addition of 12 ml 0.1N NaOH is O 3.69 О 11.2…

A: Given Normality of HA = 0.1 N Volume of HA = 10 mL Mole of HA = Normality of HA * Volume of HA Mole…

Q: buffer of pH = 7.5 is desired. Which two of the following compounds should be dissolved in water in…

A: Buffer is the solution of mixture of weak acid/weak base with its salt of strong base/strong acid

Q: 2- one liter of buffer solution contains 0.1 mole of benzoic acid and 0.2 mole of sodium benzoate…

A: Here we are required to find the Change in pH of the buffer solution

Q: If a researcher needs the pH of a reaction solution to be maintained at pH 8.3. There are a number…

A: Since, Buffer can affect when small amount of acid or bases will be added. Thus,

Q: 8. What is the pH in the preceding problem if the mixture consists of 0.1 M acetic acid and 0.25 M…

A: The acidity of a solution is expressed in pH scale and is furnished in terms of hydrogen ion…

Q: A buffer solution is made using a weak acid, HA, that has a pK, of 4. If the pH of the buffer is 1,…

A:

Q: You are studying an unusual enzyme that produces hydronium ions (H3O+) during the course of the…

A: This question is from ionic equilibrium. We will figure out it answer with proper explanation.

Q: Which of the following titration systems will have the largest ApH at the equivalence point region?…

A: In acid-base titration is an example of neutralization reaction, so the pH at equivalence point is…

Q: What is the pH of a buffer that results when 5.46 mole of H3PO4 is mixed with 2.97 mole of NaOH and…

A: · Moles of H3PO4 = 5.46 mol· Moles NaOH = 2.97 mol· Volume of solution = 1.00 L· Ka1 = 7.5 × 10–3

Q: What is the pH of a 250.0 mL solution that contains 3.17 g of potassium monohydrogen phosphate and…

A: Given,  The pH of a 250.0 mL solution that contains 3.17 g of potassium monohydrogen phosphate and…

Q: 1. A buffer solution is prepared by taking 0.25 moles of acetic acid (pKa = 4.76) and 0.400 moles of…

A: 1. Given,

Q: Which

A: Those solution when resist to change the pH when small amount of acid or base added on it's then…

Q: Calculate the buffer capacity of a buffer solution prepared by mixing 0.215M sodium acetate and…

A: Given =  Concentration of sodium acetate  = 0.215M Conc of acetic acid =  0.125M pKa =  4.76

Q: calculate the pH of a solution that is made when 0.10 L of 0.24 M benzoic acid (pKa=4.19) and 3.00 g…

A: Molarity of sodium benzoate can be calculated as follows:

Q: Suppose you have a buffer, comprised of 0.350 mol of weak base and 0.250 mol of weak acid. Ifthe pH…

A: The of a buffer solution can be calculated using Henderson Hasselbalch Equation written as follows:…

Q: An analytical chemist is titrating 134.4mL of a 0.6500M solution of nitrous acid HNO2 with a 0.7300M…

A: The molarity of an unknown solution can be determined by titrating it with a known solution by using…

Q: What is the pH of a solution that contains 0.2 M sodium acetate and 1.1 M acetic acid (pka=4.76)?

A:

Q: What is the pH of a buffer solution that is 0.251 mol L in lactic acid and 0.151 mol L in sodium…

A: Given: Concentration of Lactic Acid= 0.251 mol L-1 Concentraion of Sodium Lactate= 0.151 mol L-1 Ka=…

Q: A chemist has synthesized a monoprotic weak acid and wants to determine its pKa value. To do so,…

A: The strength of acid is determined by acid dissociation constant.

Q: buffer system has 3[HA]=[A-]. Given that the pKa is 7.2, what is the pH of the buffer solution at…

A: Given,  3[HA]=[A-]  [A-]/[HA] = 3  pKa = 7.2  It is Acidic buffer,   pH = pKa + log([A-]/[HA])

Q: An industrial chemist studying bleaching and sterilizing prepares several hypochlorite buffers.…

A: Given : a buffer solution with  1) concentration of weak acid i.e HClO = 0.200 M 2) concentration of…

Q: A buffer solution is prepared by taking 0.400 moles of acetic acid (pKa = 4.76) and 0.250 moles of…

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

Q: _______6. Na2 CO3   forms alkaline solution when dissolved in water. Why? Because water hydrolysis…

A:

Q: A buffer is made up from 0.15 M acetic acid and 0.5 M sodium acetate. What is the pH of the buffer…

A:

Q: 0.50 M acetic acid and 0.20 M sodium acetate has a pH of 5.1 (buffer solution) What is the acid's…

A:

Q: A buffer solution is composed of 5.00 mol of acid and 1.75 mol of the conjugate base. If the pKa of…

A:

Q: Calculate the pH of a solution that is made when 0.10 L of  0.24 M  benzoic acid (pKa = 4.19)  and…

A: Mass of sodium benzoate = 3.00 g Molar mass of sodium benzoate = 144.11 g/mol Moles =…

Q: Consider the list of acids and their pKa values attached What two compounds would be best to use in…

A: Buffers are effective when the pKa values are closest to pH.

Q: The addition of 40.0 mL of HCl to 1000 mL of 0.5 M phosphate buffer changes the pH from 7.5 to 6.8.…

A: Given: The initial pH of the phosphate buffer = 7.5 Since 7.5 is closest to the pKa2 value of H3PO4,…

Q: In a lab, you titrate 27.0 mL of 0.100 M acetic acid (CH3COOH, a weak acid, pKa 5.756, Ka 2.75 x…

A:

Q: what is the pH of a buffer that is 0.260 M in a weak acid and 0.250M in the acids conjugate base?…

A: Given Buffer of 0.260 M in a weak acid and 0.250M in the acids conjugate base with pKa for the acid…

Q: 6. If 25.1 mL of 0.109M acid with a pKa of 5.27 is titrated with 0.108 M NaOH solution, what is the…

A: The volume of acid V1=25.1 mL The concentration of acid C1=0.109 M The strength of an acid is pKa =…

Q: You make a Buffer using a Weak acid (HA) with a pKa of 7.95 and its Conjugate Base Salt (NaA). You…

A: pH = pKa + log{[A-]/[HA]}        = 7.95 + log(0.100/0.500)        = 7.95 - 0.698        = 7.25

Q: Acetic acid’s pKa is 4.75 and nitrous acid’s pKa is 3.16. If you made one buffer of equal parts…

A: Given: pKa of acetic acid = 4.75  pKa of nitrous acid = 3.16  And both the buffers have an equal…

Q: alculate the change in pH that occurs when 0.5mmol of strong acid is added to 100ml of 0.05M lactic…

A:

Q: I have 3 moles of a monoprotonated base (there are four pKa values(pKa1=2.3, pKa2=4.6,pKa3=10.1,…

A: The chemical reaction for the monoprotonated base can be given as follows: HCl+B-→HB+Cl-;…

Q: The pKa of lactic acid is 3.86. What is the pH of a buffer in which the lactic

A:

Q: A particular buffer has been made up at 25 °C to give a pH of 8.00 and is then warmed to 35 °C. The…

A: The expression of Henderson-Hasselbalch equation is shown below:

Q: What is the pKa of an acid if a buffer made from 0.045 mol of the acid and 0.060 mol of its…

A: The pH is used to determine the acidity or basicity of a solution. The pH of a solution is the…

Q: Chemistry 2. The pks of tye amino acid Arg are 1.82, 8.99, and 12.48. If Arg was used as a buffer,…

A: We have find out the ratio of conjugate base to weak acid in a pH of 7.00 Arg buffer.

Q: Calculate the pH of a buffer in which [HC4H7O2] = 0.36 M and [C4H7O2 –] = 0.31 M. How do you…

A: The buffer is made from HC4H7O2 and C4H7O2 –. Thus this is a buffer of a weak acid.  Let us consider…

Q: The Ka values for nitrous acid (HNO2) and hypochlorous (HClO) acid are 4.5 * 10-4 and 3.0 * 10-8,…

A: Given data: The Ka values for nitrous acid are 4.5 ×10-4. The Ka values for hypochlorous acid…

Q: A sodium hydrogen carbonate/sodium carbonate buffer system is to be prepared with a pH of 9.89.  The…

A: Answer is explained below.  The given information are as follows:

Q: 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…

A:

Q: a weak acid HA has a pKa of 4.50, what concentration of conjugate base A- would you need to combine…

A: