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:
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