27) What is this buffer's approximate pH range in which it is still effective?а.4.32-6.32b. 4.21-6.21c. 4.43-6.43d. Any pH below 728) If I want a solution that stays around a pH of 5.0, was this a good acid to use? Provide proof.a. Yes because a pH of 5.0 is acidic and this buffer is comprised of a weak acid with its conjugatebase.b. Yes because a pH of 5.0 is within the pH range of the buffer's efficiency.c. No because this buffer is made using a weak acid so it would be more effective in a solutionwith a basic pH.d. No because a pH of 5.0 is lower than the pKa of the weak acid. (Use this to answer Qs 24-29.) Bill Nye the Science Guy is at it again and wants to show the chemistrystudents how a buffer works. He creates a buffer by mixing 50.0 mL of 0.450 M HF and 50.0 mL of 0.450MF. Just like the titration experiment, he has no idea how it works. Because of your generous nature, youdecide to help him with the following questions.24) To make a buffer, what needs to be mixed together?a) A weak acid with its conjugate base or a weak base with its conjugate acidb) A strong acid and a strong basec) A strong acid and a weak based) A strong base and a weak acid

Given: Concentration of HF = 0.450 M Volume of HF solution = 50.0 mL Concentration of F- = 0.450 M…

(Use this to answer Qs 24-29.) Bill Nye the Science Guy is at it again and wants to show the chemistry students how a buffer works. He creates a buffer by mixing 50.0 mL of 0.450 M HF and 50.0 mL of 0.450 MF. Just like the titration experiment, he has no idea how it works. Because of your generous nature, you decide to help him with the following questions. 24) To make a buffer, what needs to be mixed together? a) A weak acid with its conjugate base or a weak base with its conjugate acid b) A strong acid and a strong base c) A strong acid and a weak base d) A strong base and a weak acid

(Use this to answer Qs 24-29.) Bill Nye the Science Guy is at it again and wants to show the chemistry students how a buffer works. He creates a buffer by mixing 50.0 mL of 0.450 M HF and 50.0 mL of 0.450 MF. Just like the titration experiment, he has no idea how it works. Because of your generous nature, you decide to help him with the following questions. 24) To make a buffer, what needs to be mixed together? a) A weak acid with its conjugate base or a weak base with its conjugate acid b) A strong acid and a strong base c) A strong acid and a weak base d) A strong base and a weak acid

Chemistry for Today: General, Organic, and Biochemistry

9th Edition

ISBN:9781305960060

Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen

Publisher:Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen

Chapter9: Acids, Bases, And Salts

Section: Chapter Questions

Problem 9.153E: A substance that functions to prevent rapid, drastic changes in the pH of a body fluid by changing...

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A substance that functions to prevent rapid, drastic changes in the pH of a body fluid by changing strong acids and bases into weak acids and bases is called an: a.salt. b.buffer. c.enzyme. d.coenzyme.
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how much NaOH would be needed to overwhelm the buffer?
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In the experiment, we used titration to determine the total acid content ofsamples, which we reported in terms of molarity. Reporting acidity through pHmeasurements is quite different, in that we can only measure the amount of theacid in its ionized form. You were tasked to investigate a clear aqueous solutionof an unknown monoprotic acid. You decided to use two methods togather data.Method 1 – TITRATION: A 10. mL aliquot of the sample was diluted with 25 mLdistilled water. Two drops of phenolphthalein were added and then it was titrated3.54 mL of 0.048 M standardized NaOH to the endpoint.Method 2 – pH STRIP: You took 1 mL of the sample and used a pH strip toestimate the pH, which turned out to be around 3.3. Another 1 mL of the samplewas diluted with 9 mL of water. The pH was taken again and is now around 3.8.a) Calculate the molarity of the acid using the titration data.b) If we assume that the titrated unknown is a strong acid, predict thepH of the sample.c) Using pH strip results,…
Chem. R1) In real life situation, titrations are used everyday , specially in the medical world and laboratories. In our daily living if we experienced stomach pain and bloating why is it that we need to take a drug that contains Famotidine Calcium Carbonate Magnesium Hydroxide?
Below is the titration curve for a monoprotic weak acid/weak base. In order to produce this curve you titrate the weak acid with NaOH until its all been converted to its weak base form. Recall fro general chemistry, at 1.0 equivalents of titrant (OH-), all of your original acid analyte has been neutralized (deprotonated) and is in its basic form. Please answer the following questions. 11 10 9 8 7 5 4 1 0.2 0.4 0.6 0.8 1 OH Equivalents a. What is the pka of this compound? Entry Format: Please round your answer to the nearest wh number. b. At a pH of 6 will the concentration of the conjugate base be higher or lower than the concentration of conjugate acid? Entry Format: Please type the word higher or lower with no capitalization. c. Using the pKa you calculated in part a, find the percent of molecules that are in the conjugate form at a pH of 5.2. Entry Format: Please give your answer rounded to two significant figures and do not include a percent symbol. Two sig figs looks like: 1.0 60.…
How are represented buffer systems? Give examples.
A buffer contains significant amounts of acetic acid and sodium acetate. a)Write an equation showing how this buffer neutralizes added acid (HBr(aq) Express your answer as a chemical equation. Identify all of the phases in your answer. b)Write an equation showing how this buffer neutralizes added base (KOH(aq) Express your answer as a chemical equation. Identify all of the phases in your answer.
Compare the results of two experiments: First, a small amount of base is added to an unbuffered solution with a pH of 7. Second, the same amount of base is added to a buffered solution with a pH of 7.