If the Ka of a weak acid is 4.89 x 10-4, then what would the pH of a buffer system be if equal amounts with equal concentrations of the anion and acid forms were mixed together?   A.  3.31 B.  7.62 C.  10.7 D.  Not enough information has been given to solve this problem.

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: What volumes of 0.5 M HNO2 and 1.0 M NaNO2 should be added together to produce 1.0 L of a buffer…

A: Apply formula for acidic  buffer.

Q: given 250. ml. of a 0.80 M diethylamine (C2H5)2NH2Br solution. Diethylamine-3 is a weak base with K,…

A: Given, Volume of Base  = 250. ml = 0.250 L Concentration of Base = 0.80 M   Mole of Base =0.80 ×…

Q: The pH of a buffer that contains 1.100 M NH3 and 1.300 M NH4+ is 9.17. What would be the new pH if a…

A: Given,  Volume of the buffer = 400 mL  Molarity of weak base, NH3 = 1.100 M  Molarity of conjugate…

Q: A buffer solution contains dissolved C₆H₅NH₂ and C₆H₅NH₂Cl. The initial concentration of C₆H₅NH₂ is…

A:

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: How many grams of solid potassium acetate should be added to 1.50 L of a 0.283 M acetic acid…

A:

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: Which statement below is incorrect? a.The pH of buffers resist pH change. c.HNO3 is nitric acid;…

A: Arrhenius gave the basic definition of an acid or base. A substance which loses a proton is known an…

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

A:

Q: Which of the following solutions will be the best buffer at a pH of 9.26? (Ka for HC2H3O2 is 1.8 x…

A: option d is correct.  Explanation: Given : pH = 9.26 Ka for acetic acid = 1.8 ×10-5 Kb for NH3 =…

Q: Calculate the pH of a buffer that is 0.200 M H3BO3 and 0.122 M KH2BO3.

A:

Q: A chemistry graduate student is given 100.mL of a 0.40M trimethylamine ((CH3)3N) solution.…

A: Given : concentration of (CH3)3N = 0.40 M volume of (CH3)3N solution = 100 mL = 0.1 L…

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: ethylamine C2H5NH2 Kb = 4.3×10-4 An aqueous solution contains 0.494 M ethylamine (C2H5NH2). How…

A: Hydroiodic acid is strong acid and ethylamine is a weak acid. 225mL  0.494M  C2H5NH2 =…

Q: How many grams of ammonium sulfate ((NH4)2 SO4) would you need to add to 425 mL of 0.28 M ammonia…

A:

Q: What is the [H3O+] and the pH of a benzoic acid-benzoate buffer that consists of 0.23 M C6H5COOH and…

A:

Q: -4 A chemistry graduate student is given 100. mL of a 1.50M trimethylamine (CH,),N)s solution.…

A:

Q: A buffer is made by adding 19.4 grams of lithium fluoride to 200 mL of 2.00 M HF. a) What is the pH…

A:

Q: Which of the following chemicals would be the best buffer for a pH 9.00 solution: NH3 (Kb =…

A:

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: dissolving 1.22 grams benzoic acid (pKa = 4.20, Molar Mass, μ = 122 g/mol) and 2.88 grams sodium…

A: Given, Mass of acid = 1.22 g Mole = 1.22/122   = 0.01 mol Mass of salt = 2.88 g Mole = 2.88/144   =…

Q: What is the pH of a buffer system prepared by dissolving 10.70 grams of NH4Cl and 20.00 mL of 12 M…

A: Mass of NH4Cl = 10.70 g  Molarity of NH3 = 12 M Volume of NH3 = 20 mL = 0.020 L  Volume of buffer…

Q: A buffer solution contains dissolved C₆H₅NH₂ and C₆H₅NH₃Cl. The initial concentration of C₆H₅NH₂ is…

A: A solution which is a mixture of weak acid and its conjugate base is known as buffer. For…

Q: Which of the following 1:1 mixtures would be best suited to form a buffer closest to a pH of 10 5? O…

A: SOLUTION: Step 1: The pH of a buffer solution can be calculated from the Pkb value as follows.…

Q: 6. How is the pH of a buffer determined theoretically? What is the formula being used?|

A: The solution is given below-

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: For a hypothetical buffer prepared from acid-conjugate base components with pKa of its acid…

A: Given,  pKa of the unknown acid = 4.56  Which pH range would it be expectedly most effective = ?…

Q: What molar ratio of salt to acid would be required to prepare a buffer solution with a pH of 5.9?…

A: Since you have asked multiple question, as per our company guidelines we are supposed to answer the…

Q: How many grams of sodium acetate, NaC2H302, would have to be added to 1.0 L of 0.85 M acetic acid…

A:

Q: A 100.00 mL buffer is prepared by dissolving 1.22 grams benzoic acid (pKa = 4.20, Molar Mass, μ =…

A:

Q: A chemistry graduate student is given 250. mL of a 1.30M dimethylamine ((CH) NH) solution.…

A: We have to calculate the mass of (CH3)2NH2Br needed.

Q: A chemistry graduate student is given 100. mL of a 0.60M dimethylamine ((CH) NH) solution.…

A: we need to calculate the mass of diethylamine bromide dissolved in the solution to form a buffer

Q: Calculate the pH of a solution that is 0.20 M HOC1 and 0.92 M KOCI. Ka = 3.5x10-8 pH = 8.16 b In…

A:

Q: A chemistry graduate student is glven 250. mL of a 0.80M pyridine (C,H,N) solutlon. Pyridine Is a…

A: The Henderson Hasselbalch equation is - pH = pKb + log ([Salt]/[Base])   Here - pH = 5.43 pKb = -…

Q: (D) The two solutions have the same pH valuc. () CheCl te (B). C+ aq Ca) ICL 2 Clae (DJ Clz) Which…

A: GivenNa2CO3  + H2SO4 → Na2SO4  + H2O + CO2Molarity of H2SO4  = 0.05 mol/LVolume of H2SO4 =28 cm3 =…

Q: What ratio of sodium benzoate, C6H5CO2Na, to benzoic acid, C6H5CO2H, do you need to prepare a buffer…

A:

Q: 4. The molar ratio between a weak acid and its base conjugate was (3:2). Calculate the Ka of the…

A: Hendrson hasselbalch equation will be use to determine Ka value

Q: A buffer solution contains dissolved C6HsNH2 and CsHsNH3CI. The initial concentration of CeHŞNH2 is…

A:

Q: In a hospital laboratory, a 10.0 mL sample of gastric juice, obtained several hours after a meal,…

A: Given: V1 = 7.2 mL NaOH M1 = 0.1 M NaOH V2 = 10.0 mL HCl M2 = ?

Q: The pKa for Tris-H* is 8.08. The concentration of the conjugate acid form of Tris (Tris-H*) in a…

A: The equation will be as follows: tris+H2O⇌(tris-H+)+OH- Calculation of pKb of tris:…

Q: 2. 6.75 grams of sodium benzoate, NaC7H5O2, is added to 1.00 L of a 0.25 M benzoic acid solution…

A: Given in following question 6.75 gm of sodium benzoate NaC7H5O2 is addedin 1lit of a 0.25M benzoic…

Q: An aqueous solution contains dissolved CeHgNH3Cl and CH NH2. The concentration of CaH; NH2 is 0.50 M…

A:

Q: A chemistry graduate student is given 100. mL of a 0.60M diethylamine ((C,H;), NH) solution.…

A: Given : Kb of (C2H5)2NH = 1.3 X 10-3  Volume of solution = 100 mL = 0.100 L…

Q: A) Make 500 ml of a 50 X solution of HEPES buffer. B) Use this (50X HEPES Buffer) to make 1 liter of…

A: Required : a) 500 mL of 50X HEPES Buffer b) Make 1 L of 0.5X HEPES from above solution The recipe of…

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: -10 A chemistry graduate student is given 125. mL of a 1.80 M hydrocyanic acid (HCN) solution.…

A: Given: Volume of Hydrocyanic acid (HCN) = 125 mL Concentration of HCN = 1.80 M Ka = 4.9 x 10-10 pH…

Q: Topic: Equilibrium constants of weak acids and basis along with their applications in buffers.…

A: Buffers are substances which resist the change in pH values. Our blood is good example of buffer.…

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: You want to make your own buffer solution with a desired pH of 4.2. The systems available to use…

A:

Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.