Answered: 3. Briefly describe any differences or…

3. Briefly describe any differences or similarities for any pH changes observed for DI water compared to a buffered solution when the lemon juice was added to each.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Bronsted-Lowry base in inorganic chemistry is any chemical substance that can accept a proton from the other chemical substance it is reacting with.

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3. Briefly describe any differences or similarities for any pH changes observed for DI water compared
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Using the table of the weak base below, you have chosen Methylamine as your weak base in the buffer solution. You have already added enough of the conjugate acid salt to make the buffer solution concentration at 0.48 M in this salt. The desired pH of the buffer should be equal to 9.75. Values of K, for Some Common Weak Bases Conjugate Acid Name Formula 1.8 × 10-5 4.38 × 10-4 5.6 x 10-4 3.8 × 10-10 1.7 x 10-9 NH4 CH;NH3* NH3 CH;NH2 C¿H;NH2 CH;NH2 C;H;N Ammonia Methylamine Ethylamine Aniline C¿H§NH3* CH;NH;* C;H;NH+ Pyridine 3. Compute the concentration of the weak base in Molarity. (round off final answer to 4 decimal places)
In the preparation of glycine solution, 10 mL of 0.20 M KCI were added for; A. В. Increasing the ionization of glycine into Rendering the glycine solution to a buffer capacity ionic species D. С. Increasing the basicity nature of the amine group Decreasing the acidity nature of the carboxyl group Select answer Save C.
The value for is 6.38. What mole ratio of to is needed to prepare a buffer with a pH of 6.69?
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A- Define the buffer solution, and then prove that the dilution has no effect on the PH of a buffered solution. B- Prove that the buffer solution which consists of (0.2M) for each of acetic acid and sodium acetate resists the PH change that take place when (1 mL of 0.1 M) of HCL is added to (10 mL) of this solution.
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6. How many grams of NazHPO, *2 H20 (177.99 g/mol) should be added to 500 mL of 0.5 M H3PO4 to give a buffer solution of pH 8.50? (H3PO4; Kai=7.11x10°, Ka2=6.32x10*, Ka3=4.5x1013)
14. A so-called PBS buffer (phosphate buffered saline) is prepared by according to the given protocol: ● Prepare 800 mL of distilled water in a suitable container; ● Add 8 g of NaCl to the solution; Add 200 mg of KCl to the solution; Add 1.44 g of Na₂HPO4 to the solution; Add 245 mg of KH₂PO4 to the solution; Adjust solution to desired pH (typically pH ≈ 7.4); and Add distilled water until volume is 1 L. (a) Calculate the pH of the initial solution (before pH is adjusted). (b) How many moles of acid or base are required to adjust the pH to 7.4?