20) Which acid would be totally consumed if 10 mL of 0.1 M NaOH is added to 10 mL of a mixture that is 0.01 M in each of acetic acid and cyclohexamine? Justify your answer.
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- 1. (a) Perform the calculations required to prepare 100ml of 0.20M sodium acetate buffer of pH 5.40 if you are given a bottle of sodium acetate (M.W = 82) and a bottle of concentrated hydrochloric acid (Normality = 11.M). The pKa of acetic acid is 4.80. (b) After the calculations, prepare the buffer. Check the pH of your reparation and comment on your results. 3. Prepare 1:1, 1:4, 1:10, and 1:100 dilutions of your buffer and obtain pH readings for them. Plot on a graph paper pH against buffer concentration. Explain the shape of the graph.You need to prepare an acetate buffer of pH 5.43 from a 0.621 M acetic acid solution and a 2.95 M KOH solution. If you have 730 mL of the acetic acid solution, how many milliliters of the KOH solution do you need to add to make a buffer of pH 5.43? The pKa of acetic acid is 4.76. Be sure to use appropriate significant figures.Glycine hydrochloride (Cl− H3N+CH2COOH) is a diprotic acid that contains a carboxylic acid group and an ammonium group and is therefore called an amino acid. It is often used in biochemical buffers. Solve, In analogy with Figure , sketch the titration curve of this diprotic acid.
- What mass of sodium glycolate (NaC2H3O3) should be added to 400.0 mL of 1.00 M glycolic acid to produce a buffer solution with a pH of 4.00? Ka = 1.47 x 10-4. Please indicate the full solutions.An amino acid mixture consisting of lysine,leucine, and glutamic acid is to be separated by ion-exchangechromatography, using a cation-exchange resin at pH 3.5, with theeluting buffer at the same pH. Which of these amino acids will beeluted from the column first? Will any other treatment be neededto elute one of these amino acids from the column?MD ordered morphine SO4 gr 2/5 and the pharmacist has a stock solution of gr 1/8 per milliliter of morphine SO4. How many milliliters of the stock solution is required to fill the Rx?
- Make a 100 ml of a 1M stock solution of NaCl (you will need the molecular weight of NaCl).Complete the following table, which lists information about the measured acid dissociation constants of three unknown weak acids. Note: be sure each number you put in the table has the correct number of significant digits. acid K Κα PK relative strength a a ☐ x10 A B C 1.2 × 10 3. 10 4 ☐ 11.539 ×Quinine ( C20 H24 N2 O2) is the most important alkaloid derived from cinchona bark. It is used as an antimalarial drug. For quinine, pK, = 5.1 and pK, = 9.7 ( pKp = – log Kp). Only 1 g quinine will dissolve in 1920.0 mL of solution. Calculate the pH of a saturated aqueous solution of quinine. Consider only the reaction | Q+ H2O= QH+ + OH- described by pK, where Q = quinine. pH =
- What mass of sodium glycolate (NaC2H3O3) should be added to 400.0 mL of 1.00 M glycolic acid to produce a buffer solution with a pH of 4.00? Ka = 1.47 x 10-4Benzalkonium chloride 17% w/v . . . . . qs Water qs . . . . . . . . . . . . . . . . . . . . . . 120 mL M. ft . solution such that 2 tbsp added to a pint of water will yield a 1:750 solution. How many milliliters of the 17% w/v stock solution will be needed to prepare the 120 mL? a 2.68 mL b 7.90 mL c 15.80 mL d 20.40 mL e 6.28 mL80mL of a 0.3M solution of hexapeptide Leu-His-Cys-Glu-Asn-Arg is adjusted to pH=pI. The solution is then titrated with 0.2M HCL to a final pH of 2.1. Sketch the titration curve, labelling the pH and volume axes. Indicate the volume of HCL needed to reach relevant pKa value and equivalence point(s)z Relevant pKa values are: 2.1, 4.3, 6.0, 8.3, 9.8, and 12.5.