Question 20 of 32 > A 1.069 g sample of N-2-acetamido-2-aminoethane-sulfonic acid potassium salt (ACES K'....
A 1.986 g sample of N-2-acetamido-2-aminoethane-sulfonic acid potassium salt ( ACES − K + , MW = 220.29 g/mol) is dissolved in 73.73 mL of water.To the solution, 14.73 mL of HCl is added, resulting in a pH of 6.56 . Calculate the concentration of the HCl solution. The p K a of ACES is 6.85.
A 1.944 g sample of N-2-acetamido-2-aminoethane-sulfonic acid potassium salt (ACES-K+, MW = 220.29 g/mol) is dissolved in 52.38 mL of water. To the solution, 27.66 mL of HCl is added, resulting in a pH of 6.95. Calculate the concentration of the HCl solution. The pK, of ACES is 6.85. (HCI) = 3.80 x10-6
1.800 g of N-2-acetamido-2-aminoethane-sulfonic acid potassium salt (ACES–K , MW = 220.29 g/mol) is dissolved in 89.94 mL of water. 29.91 mL of HCl is added to the solution, resulting in a pH of 7.24. Calculate the concentration of the HCl solution. The pKa of ACES is 6.85.
A 1.982g sample of N-2-acetamido-2-aminoethane-sulfonic acid potassium salt ( ACES−K+, MW = 220.29 g/mol) is dissolved in 87.51 mL of water.To the solution, 21.98 mL of HCl is added, resulting in a pH of 7.27. Calculate the concentration of the HCl solution. The p?a of ACES is 6.85. I have calculated this several times and have gotten the same answer, 0.112754 M. However, Sapling says that I am wrong. Then Sapling gives these instructions: To begin, calculate the original number...
Question 10 (2 points) A 13.9800-g sample of a salt was analyzed for its iron content as follows: the entire sample was dissolved and diluted to 400.0 mL in a volumetric flask. A 80.00-ml aliquot of the solution required 25.38-mL of a 0.04119 M potassium permanganate solution to reach equivalence. A blank correction of 0.50 mL was required. Calculate the %(w/w) Fe in the sample. The net-ionic equation for the reaction is MnO4 (aq) + 8H+ (aq) + 5Fe2+(aq) -...
Question 2 Salicylic acid, HC,H,0, is a chemical compound used in many facial cleansing products. Figure 2. Structure of Salicylic Acid a) Identify the ionizable hydrogen (HA or Hg) with the correct pk НА lonizable Hydrogen pK, 2.97 HA 13.7 :91 3 19- 10 b) The solubility of salicylic acid in water is 0.210-96 HC,HsOs by mass. What is the pH of an aqueous solution of salicylic acid at saturation? (Assume the density of the solution is 1.00 g/mL). 2-U...
xamination, Long Question 2 2.1 The purity of a sample of solid potassium cyanide is determined as follows: • 5.00 g of impure potassium cyanide is weighed off and transformed into to a 100.00 ml. volumetric flack, dissolved and made up to the mark. • A 10.00 ml. portion of this solution is pipetted into a conical flask, and titrated with 0.700 M KMnO solution • The average titrwtion value wa 20,69 ml of the KM The reaction stoichiometry is...
Question 1 (1 point) A 52.30 g sample of Ba(OH)2 is dissolved in enough water to make 1.20 L of solution. How many milliliters of this solution must be diluted with water in order to make 1.00 L of 0.100 M Ba(OH)2? 62.8 mL 254 mL O 305 ml O 523 mL O 393 mL O Question 2 (1 point) A chemist needs 225 mL of 2.3 M HCl. What volume of 12 M HCl must be dissolved in water...
Convert playlist Diction QUESTIONS 1. (2 Points) Why is it essential to keep the diazonium salt at zero degrees while you are preparing the sodium 2-naphthoxide solution? 2. (2 Points) Would you need to use sodium carbonate for the diazotization of meta- nitroaniline? Explain your answer. 3. (2 Points) What would be the IUPAC name for the azo dye if you would have used p-chloroaniline instead of sulfanilic acid? Experiment 12 4. (4 Points) Calculate the theoretical yield for Orange...
K2CO3 1.5 H20 Br он heat 2,3-dibromocinnamic acid trans-1-bromo-2-phenylethene Compound MW mp (C)bp (C) density (g/ml) mol) 2,3-dibromocinnamic acid 307.97 93-95 (threo) n'a n a 202-204 (erythro)E K CO.1.5H:O1 methylene chloride 138.21 84.93 56.11 891 na n a n'a 39.6 n a n a 1.33 n a 3 MKOH 2. a. What is the by-product formed in this reaction (not shown in given reaction equation)? b. What is the purpose of adding 3 M KOH at the beginning of the...