solution:
correct option: A) HCOOH and D) HCOONa
The pKa values of formic acid is 3.73 which is closest to 3.65.
You have to prepare a pH 3.65 buffer, and you have the following 0.10M solutions available:...
Review | Constan You have to prepare a pH 3.65 buffer, and you have the following 0.10M solutions available: HCOOH, CH3COOH, H3PO4, HCOONa CH3COONa, and NaH2PO4 NaH2PO4 Submit Previous Answers ✓ Correct Part B How many milliliters of HCOOH and HCOONa would you use to make approximately a liter of the buffer? Express your answers using two significant figures. Enter your answers separated by a comma. V AS 0 2 ? Vycoon. VHCOONa = ml Submit Request Answer
Review Constants Periodic You have to prepare a pH 3.65 buffer, and you have the following 0.10M solutions available: HCOOH, CH3COOH, H3PO4, HCOONa CH3COONa, and NaH2PO4 Submit Previous Answers ✓ Correct Part B How many milliliters of HCOOH and HCOONa would you use to make approximately a liter of the buffer? Express your answers using two significant figures. Enter your answers separated by a comma. EVO A£¢ N O P ? VHCOOH, VHCOONa = ml Your submission doesn't have the...
You are to prepare a pH 3.50 buffer and you have 0.10M solution. HCOOH Ka= 1.8x10-4 CH3COOH Ka= 1.8x10-5 HCOONa CH3COONa How much of each solution would you need to prepare 500.0 mL of the buffer at the required pH?
You have to prepare a pH 3.55 buffer, and you have the following 0.10M solutions available: HCOOH, CH3 СООН, Нз РОД, НСООNa, CH; COONa, and NaH2 PO4 Part B How many milliliters of HCOOH and HC0ON2 would you use to make approximately a liter of the buffer? Express your answers using two significant figures. Enter your answers separated by a comma. V ΑΣΦ Vнсоон. VнсооNаa mL Submit Request Answer
1 Review Constants Periodic Table You have to prepare a pH 5.07 buffer, and you have the following 0.10 M solutions available: HCOOH, HCOONa, CH, COOH, CH3COONa, HCN, and NaCN. Correct Part B How many milliliters of each solution would you use to make approximately a liter of the buffer? Express your answers using two significant figures. Enter your answers numerically separated by a comma. IVO AXO A O 2 ? Vch. cooh , Vch,cooNa = 333,667 Submit Previous Answers...
You will prepare two of the buffer solutions used in this lab. They are the 0.1 M CHaCOOH/CH3COONa buffer at pH- 4.74 and at pH-6. You will need to write your own procedure for the preparation of these buffers. To write the procedure, study the manual and follow the pre-lab questions. Using Henderson-Hasselbach equation to calculate the ratio of [CH,COONa/[CH COOH] for each buffer and write your answers in the table on the right. Show calculations: 1. 2. You just...
Be sure to answer all parts. Calculate the pH of the following two buffer solutions: (a) 1.7 M CH3COONa/2.9 M CH3COOH. (b) 0.2 M CH3COONa/0.3 M CH3COOH. Which is the more effective buffer? A. 1.7 M CH,COONa/2.9 M CH,COOH B. 0.2 M CH3COONa/0.3 M CH3COOH
You are instructed to create 400. mL of a 0.39 M phosphate buffer with a pH of 6.2. You have phosphoric acid and the sodium salts NaH2PO4, Na2HPO4, and Na3PO4 available. (Enter all numerical answers to three significant figures.) H3PO4(s) + H2O(l) = H30+ (aq) + H2P04 (aq) Kai = 6.9 x 10-3 H2PO4 (aq) + H20(1) =H30+ (aq) + HPO42-(aq) Ka2 = 6.2 x 10-8 HPO42-(aq) + H20(I) = H30+(aq) + PO43-(aq) Ka3 = 4.8 x 10-13 Which of...
You are instructed to create 400. mL of a 0.39 M phosphate buffer with a pH of 6.2. You have phosphoric acid and the sodium salts NaH2PO4, Na2HPO4, and Na3PO4 available. (Enter all numerical answers to three significant figures.) H3PO4(s) + H20(1) =H30+ (aq) + H2PO4 (aq) Kai = 6.9x10-3 H2PO4 (aq) + H20() = H30+(aq) + HPO42- (aq) Ka2 = 6.2x 10-8 HPO42-(aq) + H20(I) = H30+(aq) + PO43-(aq) Ka3 = 4.8 x 10-13 Which of the available chemicals...
You are instructed to create 400. mL of a 0.40 M phosphate buffer with a pH of 6.4. You have phosphoric acid and the sodium salts NaH2PO4, Na2HPO4, and Na3PO4 available. (Enter all numerical answers to three significant figures.) H3PO4(s) + H2O(l) H3O+(aq) + H2PO4−(aq) Ka1 = 6.9 ✕ 10−3 H2PO4−(aq) + H2O(l) H3O+(aq) + HPO42−(aq) Ka2 = 6.2 ✕ 10−8 HPO42−(aq) + H2O(l) H3O+(aq) + PO43−(aq) Ka3 = 4.8 ✕ 10−13 Which of the available chemicals will you use...