Loading...

Messages

Proposals

Stuck in your homework and missing deadline? Get urgent help in $10/Page with 24 hours deadline

Get Urgent Writing Help In Your Essays, Assignments, Homeworks, Dissertation, Thesis Or Coursework & Achieve A+ Grades.

Privacy Guaranteed - 100% Plagiarism Free Writing - Free Turnitin Report - Professional And Experienced Writers - 24/7 Online Support

Ph of buffer solutions lab report

24/11/2021 Client: muhammad11 Deadline: 2 Day

Heather Gilbertson

Lab 12: Using Buffers

Data Table 1. Adding 0.1M HCl from D1 into A1 sodium acetate buffer solution.

Drop Number

pH of Solution

0 drops added

1

6.0

2

6.0

3

6.0

4

6.0

5

6.0

6

6.0

7

6.0

8

6.0

9

6.0

10

6.0

11

6.0

12

6.0

13

6.0

14

6.0

15

6.0

Data Table 2. Adding 0.1M NaOH from D6 into A6 sodium acetate buffer solution.

Drop Number

pH of Solution

0 drops added

1

6.0

2

6.0

3

6.0

4

6.0

5

6.0

6

6.0

7

6.0

8

6.0

9

6.0

10

6.0

11

6.0

12

6.0

13

6.0

14

6.0

15

6.0

Data Table 3. Adding 6M HCl from Pipet into B1 sodium acetate buffer solution.

Drop Number

pH of Solution

0 drops added

1

6.0

2

6.0

3

5.0

4

4.0

5

3.0

Data Table 4. Adding 6M NaOH from Pipet into B6 sodium acetate buffer solution.

Drop Number

pH of Solution

0 drops added

1

6.0

2

6.0

3

7.0

4

8.0

5

8.0

Data Table 5. Adding 0.1M HCl from D1 into C1 containing distilled water.

Drop Number

pH of Solution

1

7.0

2

6.0

3

5.0

4

4.0

5

4.0

Data Table 6. Adding 0.1M NaOH from D6 into C6 containing distilled water.

Drop Number

pH of Solution

1

8.0

2

8.0

3

9.0

4

10.0

5

11.0

Questions

1. Describe the purpose of a buffer.

The purpose of a buffer is to maintain a nearly constant pH by minimizing the change in pH, when a little bit of acid or base is added to the solution.

2. Write the acid base neutralization reaction between the buffer and the added HCl. (You don’t need to include the spectator ions.) Write the acid-base neutralization reaction between the buffer and the added NaOH.

Buffer Solution:

CH3COOH(aq)+NaOH(aq)CH3CooNa(aq)+H2O(l)

The buffer solution contains acetic acid and its weak acid and sodium acetate as its conjugate base. If we add strong HCI to the buffer solution above, the sodium acetate would react with HCI as in the chemical equation below:

HCI(aq)+CH3COONa(s)CH3COOH(aq)+NaCl(s)

If we add sodium hydroxide to the buffer solution the acetic acid in the buffer would react as in the following chemical e=reaction equation:

NaOH(aq)+CH3COOH(aq)CH3COONa(s)+H2O(l)

3. Explain how the data in tables 1 and 2 supports the role of a buffer.

In the presence of a buffer, the addition of 0.1M HCl or 0.1 M NaOH resulted in no change in pH. The solution was capable of maintaining a nearly constant pH when the smaller/ dilute concentrations of acid or base were added.

4. Describe the buffer capacity of the acetic acid buffer solution in relation to the addition of both concentrated and dilute acids and bases. Reference the results in Data Tables 1, 2, 3 and 4 in your answer.

In the presence of the acetic acid buffer solution, addition of dilute acid and dilute base did not affect the pH of the solution, as shown in tables 1 and 2. However, addition of a higher concentration of the strong acid and base altered the pH level significantly. The concentrated solutions of either the acid or the base has a significant effect in the pH of acetic acid buffer solution while the diluted acids and bases had no effect on the pH showing the buffering capacity of the acetic acid buffer solution could withstand only small amounts of the dilute acids and bases.

5. Did distilled water act as a buffer in the experiment? Use the results in Data Tables 5 and 6 to support your answer.

Distilled water did not act as a buffer because it was not able to withstand or buffer the solution upon addition of an acid or base.

6. An acetic acid buffer solution is required to have a pH of 5.27. You have a solution that contains 0.01 mol of acetic acid. How many moles of sodium acetate will you need to add to the solution? The pKa of acetic acid is 4.74. Show all calculations in your answer. pH = pKa + log [A- ]/[HA]

PH = PKa + log[CH3COONa]/[CH3COOH]

5.27 = 4.74 + log[CH3COONa]/1

log[CH3COONa] = 5.27-4.74

log[CH3COONa] = 0.53

no of moles of CH3COONa = 100.53 = 3.3884moles

Homework is Completed By:

Writer Writer Name Amount Client Comments & Rating
Instant Homework Helper

ONLINE

Instant Homework Helper

$36

She helped me in last minute in a very reasonable price. She is a lifesaver, I got A+ grade in my homework, I will surely hire her again for my next assignments, Thumbs Up!

Order & Get This Solution Within 3 Hours in $25/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 3 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 6 Hours in $20/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 6 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 12 Hours in $15/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 12 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

6 writers have sent their proposals to do this homework:

Top Class Results
Phd Writer
Engineering Exam Guru
Ideas & Innovations
Essay & Assignment Help
Coursework Help Online
Writer Writer Name Offer Chat
Top Class Results

ONLINE

Top Class Results

I am an academic and research writer with having an MBA degree in business and finance. I have written many business reports on several topics and am well aware of all academic referencing styles.

$43 Chat With Writer
Phd Writer

ONLINE

Phd Writer

I am an academic and research writer with having an MBA degree in business and finance. I have written many business reports on several topics and am well aware of all academic referencing styles.

$28 Chat With Writer
Engineering Exam Guru

ONLINE

Engineering Exam Guru

After reading your project details, I feel myself as the best option for you to fulfill this project with 100 percent perfection.

$39 Chat With Writer
Ideas & Innovations

ONLINE

Ideas & Innovations

I am a PhD writer with 10 years of experience. I will be delivering high-quality, plagiarism-free work to you in the minimum amount of time. Waiting for your message.

$24 Chat With Writer
Essay & Assignment Help

ONLINE

Essay & Assignment Help

I am a professional and experienced writer and I have written research reports, proposals, essays, thesis and dissertations on a variety of topics.

$47 Chat With Writer
Coursework Help Online

ONLINE

Coursework Help Online

I am a professional and experienced writer and I have written research reports, proposals, essays, thesis and dissertations on a variety of topics.

$17 Chat With Writer

Let our expert academic writers to help you in achieving a+ grades in your homework, assignment, quiz or exam.

Similar Homework Questions

352 pine st yreka ca - 508 bc ancient greece - Brushless motor hall sensor wiring - Hung liu paintings for sale - 1 Discussion , 1 Case Study and 1 weekly Summary. - Gcse physics for you keith johnson pdf - Brownie batter belly buster trim - Ascending and descending tracts - South east wales centre for teacher education and training - Con 290 pre course work nswers - PKI and Cryptographic Application - Sop for digital marketing course - Low volume vehicle certification plate - 6es7 392 1am00 0aa0 wiring - What size dna fragments travel further - Which theorist discovered the “risky shift phenomenon”? - Truth in 12 angry men - Https go gliffy com go html5 launch - Aafia siddiqui background - An uncomfortable bed summary - Discussion response MK - The mean amount purchased by a typical customer - Dupont case study analysis - Kottee step model - Trail making test free - 46 repeating as a fraction - Dexter industries purchased packaging equipment - Keda's sap implementation case - Pricing strategy of nestle chocolates - Annotated Bibliography - Sources of e recruitment - When did gerber start making baby food - Capturing the world's emerging middle class - Winchester college oxford university - Citizens south bank ellijay ga - Learning curve in project management - Woody word monty python - Restaurant database example - Property valuation certificate sample - All or none law - Seaside marina answers - Big mama's chicken st agnes - Rhetorical analysis of a public document - 300 words response paper on Indian culture - Food and nutrition assignment - Baroque Music Dp - Fisher and paykel dishwasher e40 error - Hemo the magnificent worksheet answers - Influencing styles questionnaire - One Element Critical Analysis - Divinely inspired moral law judaism - Effective training blanchard 5th edition pdf - Wedding cake model of justice - Grounding system design software - Describe homo erectus's cranial and postcranial anatomical characteristics - Preliminary analysis definition - Lil wayne quote mirror - The jeaning of america summary - Resource Template - Saul d harrison sons plc 1995 - Hw - Discussion - Amu engl 102 quiz 1 - Particle theory of matter grade 7 - What is the depth of a fathom - African American studies week 1 - Why did robert frost wrote fire and ice - Work from a constant force mastering physics - Week 5 Reflection - Attending college is a case where the - Transference and countertransference in therapy - Bir official receipt sample - 6.2a - Pos 2041 - Art at linden gate - The prince charles hospital education centre - How to make a science fair display board - Extort gold from merchants eso - 318 14 building code requirements for structural concrete and commentary - Math102 - Psychological first aid interventions should be - Non union fortune 100 companies - 2 4 1 project 1 your comparison template - Index of refraction for diamond - How does payroll withholding help a company's employees - Negative numbers magic squares - Handmaid's tale archive of our own - Looking for Best CV writing services - Ol 211 final project milestone two - Forest development the indian way pdf - D aulaires book of greek myths study guide free - Revivalism signs and symbols - Wind water stone octavio paz - 2.1 10 practice written assignment english - Modern particle physics pdf - Finance Mgt. Time Value of Money - Internal growth vs external growth - Westcotes residential home skegness - Excel chapter 9 grader project multiple sheet workbook management - How does a arctic fox protect itself