1. A buffer solution is made from 0.4M CH3COOH and 0.6M CH3COO–. If the acid dissociation constant of CH3COOH is 1.8*10-5, what is the pH of the buffer solution? 2. What is the pOH 0.00025 M HCl? 3. Aspirin has a pKa of 3.4. What is the ratio of A¯ to HA in the body (pH = 7.4)? (^ indicates exponent)

Q: We want to prepare 1.00 L of a buffer solution with a pH of 7.77. The following acid/base pairs are…

A: (1) According to Henderson-Hasselbalch equation, pH=pKa+ log[conjugate acid][base]

Q: a) Acetic acid is a weak acid that dissociates into acetate ion and hydronium ions in solutions:…

A: 1.) To calculate ratio , we would use Henderson Hasselbalch equation.  2.) To make a buffer of given…

Q: Which is the best solution to buffer at pH = 10.50?           (A) A buffer solution containing 0.25…

A: Henderson-Hasselbalch equation The equation that is used to calculate the pH of a buffer solution is…

Q: Consider a buffer solution comprised of HF and F-. The Ka of HF is 6.3 x 10-4. If the pH of the…

A: Weak acid are those acid which does not dissociate completely in aqueous solution. Here HF is weak…

Q: 20.00 mL of HCl solution was titrated with 0.1015 M NaOH.  What is the concentration of the HCl…

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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: A buffer solution made from HNO2 and KNO2 has a pH of 3.72 . If p Ka for HNO2 is 3.35 , what is the…

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

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Q: An analytical chemist is titrating 1/8.6 mL of a 0.7500M solution of ammonia (NH3) with a 0.4800M…

A: Given -> Volume of NH3 = 178.6 ml Molarity of NH3 = 0.7500 M Volume of HNO3 = 142.1 ml Molarity…

Q: Researchers have shown that hypochlorous acid (HCIO) generated by white blood cells kills bacteria.…

A: From Ka, α can easily be found. Then by multiplying the concentration with α, we can find the conc…

Q: >Calculate pH of a solution of a 0.10 M CH3COOH solution? Ka = 1.8 X 10-5 How many grams of CH3COOh…

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Q: Salts containing the phosphate ion are added to municipalwater supplies to prevent the corrosion of…

A: GIVEN: pKa1 = 7.5 x 10 - 3 pKa2 = 6.2 x 10 - 8  pKa3 = 4.2 x 10 - 13 Concentration of Na3PO4= 1 x 10…

Q: A buffer solution is 0.444 M in CH3COOH and 0.346 M inCH3COONa . If Ka for CH3COOH is 1.8×10-5 ,…

A: pH of buffer solution is calculated using formula  pH = pKa + [CH3COONa] / [CH3COOH]

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: A buffered solution containing disolved aniline, C6H5NH2, and aniline hydrochloride, C6H3NH3Cl, has…

A: A. Given that : pH of the buffer solution = 5.71 Concentration of base (C6H5NH2) = 0.290 M The pKb…

Q: 9. Which of the following solutions has the highest buffer capacity? K, of HCH;O=1.8x10* (a) 0.50 M…

A: Given: Ka of HCH2O = 1.8 × 10-4.

Q: 4. Formic acid, HFor, has a K value of 1.8 x 10-4. You need to prepare 150 mL of a buffer hav- ing a…

A: Given pH of buffer = 3.25 Volume of buffer = 150 ml = 0.15 L ( 1L = 1000ml) Molarity of HCOOH = 0.1M…

Q: What is the pH of a buffer solution that is 0.159 M in hypochlorous acid (HCIO) and 0.121 M in…

A: Given: Concentration of hypochlorous acid (HCIO)=0.159 M Concentration of  sodium hypochlorite…

Q: Cacodylic acid (dimethylarsinic acid, HAsO2(CH3)2) is a common buffer used in biology to prepare and…

A: Given: The pKa value of cacodylic acid is 6.3 The volume of NaOH (sodium hydroxide) is 10.0 mL The…

Q: How much 5.90 M NaOH must be added to 450.0 mL of a buffer that is 0.0215 M acetic acid and 0.0270 M…

A: The volume of 5.90 M NaOH must be added to a buffer solution to raise the pH to 5.75 is to be…

Q: A buffer solution is 0.387 M in HNO2 and 0.314 M in NaNO2 . If Ka for HNO2 is 4.5×10-4 , what is the…

A: Buffer is a solution which resists the change in pH of a solution by the addition of acid or base.…

Q: 4. Human blood is slightly basic in nature with a normal pH range of 7.35-7.45. The blood pH is…

A: a) The component of the buffer that will react to the added acid has to be determined and explained.…

Q: KOH is used to titrate an acid to the equivalence point. The indicator thymolphthalein was chosen as…

A: The chemical indicator is any substance which gives visible sign, usually by colour change, of the…

Q: What will be the pH of a solution when 200ml of 0.1M HEPES in the basic form and 100mL of 0.1 M…

A: Given: Concentration of Base = 0.1 M volume = 200 mL = 0.2 L concentration of acid = 0.1 M volume =…

Q: 7. Which of the following conjugate acid-base pair would you choose to prepare a buffer solution…

A: Buffer solution: The solution that resists the change in pH is known as a buffer solution. The…

Q: Shown below is the titration curve for phosphoric acid. What is the composition of a solution of…

A: The question is based on the concept of titrations. we have to identify composition of phosphoric…

Q: You are hired by a company to make and test buffer solutions for biological labs. The main buffer…

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Q: Calculate the pOH of 103.16 mL of a buffer initially consisting of 0.1752 M H2NCH2COOH and 0.1573 M…

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Q: Determine the pH of a carbonate buffer system that contains 0.0065 M of HCO3- and 0.0084 M of CO32-.…

A: Given :-  [HCO3-] = 0.0065 M  [CO32-] = 0.0084 M  Ka of HCO3- = 4.7x10-11  To calculate :-  pH of…

Q: Calculate the pH of a buffer solution prepared by dissolving 0.20 mole of cyanic acid (HCNO) and…

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Q: Phosphoric acid is a triprotic acid (Kal = 6.9 × 10-3, K2 = 6.2 x 10-8, and Ka3 = 4.8 x 10-13). To…

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Q: The pH of a buffer solution containing 0.5 mole/litre of CH3COOH and 0.5 mole/litre CH3COONa has…

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Q: Consider a 1.00 L solution which is 0.010 M CH3CO2H and 0.10 M NaCH3CO2. Ka = 1.8*10-5 a. What is…

A: This question can be solved using henderson-hesselbech equation.

Q: Phosphoric acid is a triprotic acid (K₁1 = 6.9 × 10-³, K₁2 = 6.2 × 10-8, and Ka3 = 4.8 × 10-¹³). To…

A:

Q: Calculate the pH of a buffer made by adding HCO2H (formic acid) and NaCO2H to water if at…

A: Given: At equilibrium, CO2H-=8.00×10-3 MHCO2H=2.50×10-4 M Ka = 1.77×10-4

Q: 8. The Ksp of nickel (II) hydroxide (Ni(OH)2) is 5.50-10-16 What is the pH of a saturated solution…

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Q: A phosphate buffer solution containing 0.25 M KH2PO4 and 0.45 M K2HPO4 has a pH of 7.46. A small…

A: Ionic compounds dissociate in ions. In an aqueous state ionic compounds separate in equilibrium. The…

Q: 5. A buffer solution contains 10.0 mmol of formic acid (HCOOH) and 15.0 mmol of formate (HCO0). If…

A: Given:Moles of Formic acid = 10.0 mmol.Moles of Formate ion = 15.0 mmol.PH of the solution =…

Q: What is the resulting pH when 0.005 moles of KOH is added to 0.100 L of a buffer solution that is…

A: H2PO4-(aq) ---> H+(aq) + HPO4-2(aq) Ka = 6.2 * 10^-8 pKa = -log(6.2 * 10^-8) = 7.21 pH = pKa +…

Q: The pH of unbuffered water, such as rain, is decreasing consistently over time as atmospheric CO2…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Consider a buffer solution prepared by adding 0.45 mol of CH3COOK to 1.00 L of 2.00 M CH3COOH. (K₁ =…

A: The given buffer solution is an acidic buffer solution which is made up of weak acid (CH3COOH) and…

Q: = H+ + HPO;- Ka = 6.2 x 10-8 = H+ + SO?- Ka = 1.3 x 10-2 From the systems above, identify the…

A: The question is based on the concept of buffer solution.   A buffer is a solution which resist any…

Q: 4. Which one of the following is a TRUE statement on buffer solutions? 10. [A]. fol The pH changes…

A: A buffer is a solution that can resist pH change upon the addition of an acidic or basic components

Q: Which of the following would have the highest buffer capacity? Group of answer choices 1.0 M HCN /…

A: We are given different acids and conjugate bases and their concentration values.  We have to find…

Q: In some natural systems the pH must be maintained within very narrow limits. e.g. in human blood the…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: What is the pH of a buffer solution consistig of 0.035 M NH3 and 0.050 M NH4 + ? (Ka for HN4+ = 5.6…

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Q: Which of the following conjugate acid-base pair would you choose to prepare a buffer solution that…

A: Buffer is a solution that resists the change in pH when small amount of acid or base is added to it.…

Q: A buffer solution is prepared in such a way that the concentration of propanoic acid is 3.9 x 10-1…

A: Given that The reaction for buffer equilibrium is: C2H5COOH + H2O ↔H3O+ + C2H5COO-   Ka = 1.34×10-5…