Strong base is dissolved in 595 mL of 0.600 M weak acid (K, = 3.52 × 10 ) to make a buffer with a pH of 4.20. Assume that the volume remains constant when the base is added. HA(aq) + OH (aq) H,O(1) + A (aq) Calculate the pK, value of the acid, and determine the number of moles of acid initially present. initial amount: mol HA

Q: 40.0 mL of 0.12 M weak monoprotic acid with a Ka value of 1.0*10^-5 is titrated with 0.12 M…

A:

Q: A buffer solution contains 0.486 M hydrocyanic acid and 0.298 M potassium cyanide (K₂ (HCN) = 4.00 ×…

A: A buffer is a solution which resist any change in pH on adding a small amount of acid or base . it…

Q: You are asked to prepare a buffer solution with pH 5.10. If you start with a solution containing…

A: Answer: Part A) 22.6 mmol CH3COONa                 Part B) 151 ml

Q: Given aqueous solutions of 0.1 M weak acetic acid (CH3COOH, pKa=4.72) and 0.1 M sodium acetate…

A: Consider the volume of acetic acid in the final solution be x L and the volume of sodium acetate in…

Q: A sample of acetic acid is titrated with a standardized NaOH solution. Beyond the end-point of the…

A: The titration reaction taking place is given as, => NaOH (aq) + HC2H3O2 (aq) -------->…

Q: How much 5.70 M NaOH must be added to 430.0 mL of a buffer that is 0.0180 M acetic acid and 0.0240 M…

A: Concentration of NaOH = 5.70 M Concentration of acetic acid = 0.0180 M Concentration of sodium…

Q: How many grams of solid potassium butanoate (CH,CH;CH;CO,K, 126.196 g/mol) would have to be added to…

A: Given : Volume of solution = 325 mL = 0.325 L                                               (Since 1…

Q: An analytical chemist is titrating 91.3 mL of a 0.7000M solution of butanoic acid (HC3H,CO₂) with a…

A: Here we  are required to find the pH of the solution.

Q: A volume 100.0 mL of a 0.20 M acetic acid CH,COOH solution is titrated by a 0.10 M lithium hydroxide…

A: LiOH is a strong base it reacts with weak acid CH3 COOH to give a buffer solution before equivalence…

Q: A buffer is prepared such that [CH3COOH]0 = [CH3COO−]0 = 0.050 M. Calculate the volume of 0.10 M…

A: Buffer capacity is used to determine the buffer solutions resistance to changes in pH when a strong…

Q: Part A: A 252-mL buffer solution is 0.420 M in ammonia (NH3) and 0.303 M in ammonium chloride…

A: We would use Henderson Hasselbalch equation to calculate  initial pH.  Then , HBr which is a strong…

Q: The pH of a bicarbonate-carbonic acid buffer is 6.62. Calculate the ratio of the concentration of…

A: The question is based on the concept of chemical equilibrium. we need to calculate the required…

Q: What is the pH of a buffer that is 0.41 M HCN(aq) and 0.87 M NaCN(aq)? The Ka of HCN is 6.2 x 10-10.…

A: A numerical problem based on Henderson equation, which is to be accomplished.

Q: What is the pH of the buffer 0.13 M Na₂HPO4/0.16 M KH₂PO4? Round your answer to 2 decimal places.…

A: A buffer is a solution which resist any change in pH on adding a small amount of acid or base . it…

Q: A chemist titrates 250.0 mL of a 0.8118 M pyridine (C,H,N) solution with 0.3729M HBr solution at 25…

A: Given,  [C5H5N] = 0.8118 M  Volume of C5H5N in mL = 250.0 mL  [HBr] = 0.3729 M  pKb of C5H5N = 8.77…

Q: The pH of a bicarbonate-carbonic acid buffer is 7.28. Calculate the ratio of the concentration of…

A: The question is based on the concept of chemical equilibrium. we need to calculate the required…

Q: A chemist titrates 220.0 mL of a 0.6099M trimethylamine ((CH3)N) solution with 0.2791 M HCl solution…

A:

Q: A chemist titrates 180.0 mL of a 0.5682 M methylamine (CH3NH₂) solution with 0.8472 M HNO3 solution…

A: we have to calculate the pH of the solution at equivalence point

Q: Why do buffers have to be made using weak acids and their conjugate bases (or vice versa) as opposed…

A: The objective of the question is to understand why buffers are made using weak acids and their…

Q: You are asked to prepare a pH = 3.00 buffer solution starting from 1.00 L of a 1.00 M solution of…

A: Given:pH of solution = 3.00Volume of HF solution = 1.00 LConcentration of HF = 1.00 MKa of HF =…

Q: You are asked to prepare a buffer for an experiment. You have access to the following dolutions of…

A:

Q: An analytical chemist is titrating 121.0 mL of a 0.3000M solution of isopropylamine ((CH) CHNH, with…

A:

Q: A 1.44 L buffer solution consists of 0.289 M propanoic acid and 0.189 M sodium propanoate. Calculate…

A: Solution contains weak acid and its salt of strong base. So this is buffer solution.On addition of…

Q: A 45.60-mL sample of a 0.476 M solution of acetic acid (HC2H3O2) which is a weak acid with an acid…

A: We have to calculate the pH before adding NaOH.

Q: Consider a 50.0 mL sample of a solution composed of 0.25 M HNO2 and 0.25 M KNO2. Find the pH of the…

A: A buffer is a solution which resists any change in pH on adding a small amount of acid or base.  It…

Q: Consider the following reaction: CH3​COOH(aq)+OH−(aq)CH3​COO−(aq)+H2​O(l)       See Periodic Table…

A:

Q: When 22.6 mL of 0.229 M hydrochloric acid (HCI) and 22.6 mL of 0.229 M ammonia (NH3) are combined,…

A:

Q: What is the purpose of a buffer?     To ensure that pH + pOH always equals 14. To ensure that pH +…

A: We have to predict the purpose of buffer solution.

Q: A 349-mL buffer solution is 0.372 M in nitrous acid (HNO2) and 0.346 M in sodium nitrite (NaNO2).…

A:

Q: A 1.44 L buffer solution consists of 0.323 M propanoic acid and 0.132 M sodium propanoate. Calculate…

A: pKa  = - log Ka            =  - log (1.34  * 10-5)          = 4.8729

Q: I have a buffer solution that consists of 0.200M benzoic acid, and 0.220M sodium benzoate. If the Ka…

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

Q: What mass (in g) of sodium formate, HCOONa, must be added to 10.0 L of a 0.483 M aqueous solution of…

A: Here, we have to find the mass of sodium formate that must be added to 10.0 L of a 0.483 M aqueous…

Q: What is the pH of a buffer that is 0.41 M HCN(aq) and 0.87 M NaCN(aq)? The Ka of HCN is 6.2 x 10-10.

A: Using Henderson Hasselbalch equation we can calculate pH of a buffer

Q: An analytical chemist is titrating 85.5 mL of a 0.4000M solution of formic acid (H₂CO₂) with a…

A: Given A solution is prepared using formic acid = 0.4000M x 85.5 ml        = 213.75 mmol NaOH =…

Q: Report how to make 1.0L of an 0.25M, pH = 5.2 acetate buffer using glacial acetic acid and sodium…

A: A buffer solution is a solution whose pH remains unchanged upon addition of small amounts of acid or…

Q: Determine the pH at the point in the titration of 40.0 mL of 0.200 M HC4H,O2 with 0.100 M Sr(OH),…

A:

Q: A buffer is composed of 0.200 M (CH3)2NH (Kb = 5.9 × 10–4) and 0.250 M (CH3)2NH2NO3. What is the pH…

A: The given solution is a buffer solution composed of (CH3)2NH and (CH3)2NH2NO3. Molarity of (CH3)2NH…

Q: Determine the pH of a buffer containing 0.12 M acetic acid (pKa = 4.76) and 0.078 M sodium acetate?…

A: To determine the pH of a buffer solution consisting of 0.12 M acetic acid and 0.078 M sodium…

Q: pka of butanoic acid is 4.82. Round your answer to 2 decimal places. Note for advanced students: you…

A:

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.