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

What is the function of a buffer solution

29/10/2021 Client: muhammad11 Deadline: 2 Day

Three Lab Reports

Final Report

Exercise 1

CHEM 182 DL1 Using Buffers

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.

1. Describe the purpose of a buf fer.

Copyright 2019 - Hands-On Labs | http://holscience.com 2 / 8

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)

2. Write the chemical equations for the neutralization reactions that occurred when HCL and NaOH were added to the buf fer solution.

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.

3. How do the results in Data Tables 1 and 2 support the role of a buf fer?

Copyright 2019 - Hands-On Labs | http://holscience.com 3 / 8

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.

4. Describe the buf fer capacity of the acetic acid buf fer solution in relation to the addit ion of both concentrated and dilute acids and bases. Reference the results in Data Tables 1,2,3, and 4 in 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.

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

Copyright 2019 - Hands-On Labs | http://holscience.com 4 / 8

Data Table 1: Adding 0.1 M HCl from D1 to A1

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

6. An acetic acid buf fer solution is required to have a pH of 5.27. You have a solution that contains 0.01 mol of acetic acid. What molarity of sodium acetate will you need to add to the solution? T he pK of acetic acid is 4.74. Show all calculations in your answer.a

Copyright 2019 - Hands-On Labs | http://holscience.com 5 / 8

Data Table 2: Adding 0.1 M NaOH from D6 to A6

Number of Drops pH of Solution

0

2

4

6

8

10

12

14

16

6

6

6

6

6

6

6

6

6

Copyright 2019 - Hands-On Labs | http://holscience.com 6 / 8

Data Table 3: Adding 6 M HCl from Pipet into B1

Number of Drops pH of Solution

0

2

4

6

8

10

12

14

16

6

6

6

6

6

6

6

6

6

Number of Drops pH of Solution

0

2

4

6

8

10

6

6

4

2

2

2

Copyright 2019 - Hands-On Labs | http://holscience.com 7 / 8

Data Table 4: Adding 6 M NaOH from Pipet into B6

Data Table 5: Adding 0.1 M HCl from D1 into C1

Data Table 6: Adding 0.1 M NaOH from D6 into C6

Number of Drops pH of Solution

0

2

4

6

8

10

6

6

6

8

10

12

Number of Drops pH of Solution

0

2

4

6

8

10

7

6

4

4

4

4

Copyright 2019 - Hands-On Labs | http://holscience.com 8 / 8

Number of Drops pH of Solution

0

2

4

6

8

10

6

8

10

12

12

12

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:

Calculation Master
A Grade Exams
Academic Mentor
Calculation Guru
Accounting & Finance Mentor
Engineering Mentor
Writer Writer Name Offer Chat
Calculation Master

ONLINE

Calculation Master

I have written research reports, assignments, thesis, research proposals, and dissertations for different level students and on different subjects.

$48 Chat With Writer
A Grade Exams

ONLINE

A Grade Exams

As an experienced writer, I have extensive experience in business writing, report writing, business profile writing, writing business reports and business plans for my clients.

$44 Chat With Writer
Academic Mentor

ONLINE

Academic Mentor

I will be delighted to work on your project. As an experienced writer, I can provide you top quality, well researched, concise and error-free work within your provided deadline at very reasonable prices.

$40 Chat With Writer
Calculation Guru

ONLINE

Calculation Guru

Being a Ph.D. in the Business field, I have been doing academic writing for the past 7 years and have a good command over writing research papers, essay, dissertations and all kinds of academic writing and proofreading.

$41 Chat With Writer
Accounting & Finance Mentor

ONLINE

Accounting & Finance Mentor

I have read your project description carefully and you will get plagiarism free writing according to your requirements. Thank You

$25 Chat With Writer
Engineering Mentor

ONLINE

Engineering Mentor

As an experienced writer, I have extensive experience in business writing, report writing, business profile writing, writing business reports and business plans for my clients.

$41 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

BigData Research paper final - News articles unethical business practices - Study questions - Mass effect 3 petra nebula - Week 8 IEP - Anz vanuatu online banking - Group feedback 3 - Emergency procedures in the workplace - Highest pitched brass instrument - Inputing data in spss - Identity and Access Management - Hendrich ii fall risk model form - How to write a review paper science - Ipac core competencies answers - What is the value of log81 3? show your work. - Www uxbridgecollege ac uk moodle - Topic 1 Week 5 - Green chile by jimmy santiago baca analysis - Week 3: The onset of data analysis - Bulleen and templestowe community house - Unit 7Assignment - Final Assessment - Part 2 - Presentation - Darren mcgavin glass eye - Poli 330 week 7 quiz - How to use autodesk remake - Rationale for government intervention in international trade - Vasco rossi band members - Solver white paint colours - Which of the following descriptors is false regarding enzymes - Paper on 3 articles - Anthropology - Marie little soldier quotes - Profit Payoff Decision Role Play Activity - Discussion - Best akt question bank - Marketing and Fundraising for non profit organisation - Variable costs are described by which of the following statements - The painted turtle camp delta zeta - Word document - Queensborough community college blackboard - Bachelor of clinical exercise physiology griffith - Come up a business to business idea that is not in the market. - Their city used to be walled 7 little words - 2 Assignments- Target Marketing Essay & Pricing Essay - Seed lab sql injection - Week 5 assignment 3 email based on listening skills scenario - Virtual lab mealworm behavior worksheet - Empirical Project - Wearing the face that she keeps in a jar - Salts confidence be convex - The crane wife essay - Capsim niche cost leader strategy - Mother tongue amy tan pdf - De beers diamond dilemma swot analysis - Determine the missing amounts in the following accounting equations - Ethical issues with restraints - Leadership and Organizational Changes - The humanistic science of nursing was explained by - Business ethics - The flame test lab - Earth science Geology lab work sheet - Volkswagen cornering lights failure - Fsr meaning in banking - Campbellsville university niche - Great spirits have always encountered violent opposition meaning - I need 2-3 pages assessment in Human Resource Management - 3 pilgrimage festivals in judaism - Lär dig nya språk med hjälp av Chat GPT Svenska Gratis - Provide a 50-75 word discussion reply to the following post below. Finding opportunities in the Energy Industry - Riso low solar inverter - Common monomial factor meaning - Healthcare Environment - There is no such think as free lunch - General Chemistry Homework Assignment - Why does macbeth question banquo about his plans - Essay - Hyatt regency hotel disaster - Marketing communication and brand strategy mkt 571 - Strategic group map retail industry - Wk8 DQ1 Discussion Question 1 - CLO 4 - Griffin's goat farm inc has sales of - Holy family bulletin rockford il - Week 4 Project - New century financial investments review - 40 tens is how many hundreds - Cecs in border terriers - Westpac discharge authority form 2021 - Don't panic hans rosling worksheet - The essentials of baccalaureate education for professional nursing practice - Northampton university school of health - Dulux metalshield data sheet - Week-5 - The opportunity cost of college worksheet - Relationship De-Escalation - Research-based Persuasive Essay - The four phases of mentoring are initiation, cultivation, socialization, and definition. - Case study on moral status fetal abnormality - Billabong financials - Sunpower e20 327 e ac - Cost constraint on useful financial reporting - What are the two overarching types of telehealth technologies - Wolfson house kcl address