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

Determination of ka for a weak acid lab answers

26/12/2020 Client: saad24vbs Deadline: 3 days

Copyright 2019 - Hands-On Labs | http://holscience.com 1 / 7


Student Name


Mohammed Alnaimi


Student ID 48408 Lesson Determination of Ka for a Weak Acid


Institution Ocean County College Session 2019L3 CHEM 182 DL1 Course CHEM 182 DL1 Instructor Nancy Marashi


Final Report


Exercise 1


CHEM 182 DL1 Determination of Ka for a Weak Acid


1. Using the data collected in Data Table 2, create a graph of “Drops of NaOH added” vs “pH” where “drops of NaOH added” is on the x-axis and “pH” is on the y-axis. Upload an image of the graph into Graph 1.


We use the pH indicator strips to calculate the amount of unknown acid in the receiving flask by measuring the specific amount of base it takes to neutralize the acid. There are two major ways to know when the solution has been fully neutralized. The first uses a pH meter in the beaker by slowly adding base until the pH reads exactly 7 (neutral). The next method uses a specific indicator. An indicator is an acid or base whose conjugate acid or base has a color difference from the original compound. The color changes when the solution contains a 1:1 ratio mixture of the differently colored forms of the indicator. The pH equals the p K a of the indicator at the endpoint of the indicator. Since the pH of the solution is known and the volume of titrate is added, we can then deduce how much base was needed to neutralize the unknown sample.


2. pH indicator strips work by changing color in the presence of solutions with varied pH values. T hinking about your procedure steps and results in Part 1, why do you think the pH of the unknown weak acid was not determined with pH indicator strips until Part 2?


Copyright 2019 - Hands-On Labs | http://holscience.com 2 / 7


Data Table 1: Determination of Equivalence Point


My results were close with a 5% Ka error. This error could have come from the pH key, which may not have been 100 percent read precisely. Also, incorrect measuring of solutions when preparing the experiment could have resulted in error.


3. Discuss possible causes of error in the experimental procedure. Why do you think there was a percent of error in the pK and K values of the unknown weak acid, in comparison to the values presented in Table 2?


a a


A pH meter has to be specifically calibrate correctly, so if this was calibrated incorrectly, it could also result in error, however I think that there would be a less of a percent error because a meter instrument is more accurate than strips and gives an exact numerical measurement.


4. Do you think using a pH meter instead of pH indicator strips would have created a larger or smaller percent error? Explain your answer.


Phenolphthalein is a great indicator for determining the equivalence point. Is a suitable indicator for strong acid or a strong base. It is also a good indicator for a weak acid or strong base therefore it works well in this experiment.


5. Why was phenolphthalein a good indicator to use for determining the equivalence point between the unknown weak acid and strong base?


Copyright 2019 - Hands-On Labs | http://holscience.com 3 / 7


Data Table 2: Titration Curve Values


Trial 1


Trial 1


Volume of Unknown Weak Acid


Total Number of Drops Required to Reach Equivalence Point


Average Number of Drops


Trial 1


Trial 1


Volume of Unknown Weak Acid


Total Number of Drops Required to Reach Equivalence Point


Average Number of Drops


Trial 2


Trial 1


Volume of Unknown Weak Acid


Total Number of Drops Required to Reach Equivalence Point


Average Number of Drops


4ml


114 required drops


109


4ml


104 required drops


Drops NaOH Added pH Value Trial 1


Half-Equivalent Point


Equivalent Point


0


10


54


109


3


2.5


Copyright 2019 - Hands-On Labs | http://holscience.com 4 / 7


20


30


40


50


60


70


80


90


100


110


120


Drops NaOH Added pH Value Trial 2


Half-Equivalent Point


Equivalent Point


0


10


20


30


40


50


3


3.5


4


4.5


5


6


6.5


7


7.5


8


11


54


109


1


2.5


3


3.5


4.5


5


Copyright 2019 - Hands-On Labs | http://holscience.com 5 / 7


60


70


80


90


100

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:

University Coursework Help
Top Essay Tutor
Helping Hand
Best Coursework Help
Homework Guru
Peter O.
Writer Writer Name Offer Chat
University Coursework Help

ONLINE

University Coursework Help

Hi dear, I am ready to do your homework in a reasonable price.

$102 Chat With Writer
Top Essay Tutor

ONLINE

Top Essay Tutor

I have more than 12 years of experience in managing online classes, exams, and quizzes on different websites like; Connect, McGraw-Hill, and Blackboard. I always provide a guarantee to my clients for their grades.

$105 Chat With Writer
Helping Hand

ONLINE

Helping Hand

I am an Academic writer with 10 years of experience. As an Academic writer, my aim is to generate unique content without Plagiarism as per the client’s requirements.

$100 Chat With Writer
Best Coursework Help

ONLINE

Best Coursework Help

I am an Academic writer with 10 years of experience. As an Academic writer, my aim is to generate unique content without Plagiarism as per the client’s requirements.

$100 Chat With Writer
Homework Guru

ONLINE

Homework Guru

Hi dear, I am ready to do your homework in a reasonable price and in a timely manner.

$102 Chat With Writer
Peter O.

ONLINE

Peter O.

Hello, I can assist you in writing attractive and compelling content on ganja and its movement globally. I will provide with valuable, informative content that you will appreciate. The content will surely hit your target audience. I will provide you with the work that will be according to the needs of the targeted audience and Google’s requirement.

$95 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

Ocr physics equation sheet - How netflix reinvented hr case study summary - Ken rhodes windows reviews - Ftse4good bursa malaysia index - Alkaline foods list pdf - Argumentative essay on mobile phones in school - Change for life campaign evaluation - Finding nemo pelican name - Rice production technology ppt - It's a long way from amphioxus - APA assignment - Why cell phones should be in school - Policy and politics in nursing - Silver cross strap pads - Cleft chin dominant or recessive - Role development in professional nursing practice 2nd edition - A normal population has a mean of - Kizzy children's tv programme - Go kart race track design - Nearly _____ percent of total costs occur after the purchase of hardware and software. - FIN/571: Corporate Finance - Does music affect your concentration - Benguiatitcbybt bold font - Research paper - The Role of the RN/APRN in Policy Evaluation - How to repair rv tv antenna - Allied telesis warranty check - Csi web adventures case 1 answers - Budweiser puppy love commercial 2015 - "Risk Communication" - Book Review - Nutrition - Fdic problem bank list 2017 - Manfred korfmann trojan war - Portfolio Assignment: The Role of the Nurse Informaticist in Systems Development and Implementation - Week-10 - Cisco 500-560 exam dumps - A t1 consists of _____ telephone channels - How to write a poem about world war 1 - Blank training matrix template - Friends last episode script - How many edges does a pentagon have - Common divine role that recurs in world mythology - Research paper & ppt - Apus plagiarism policy - Project mamagement - Responsibilities of district councils - 4 52 times 4 52 as a fraction - How many faces of cuboid - Stock naming system caco3 - Apps deadiversion usdoj gov webforms - Metoprolol 25 mg twice daily - Fate vs free will elizabethan times - Jackson jackson what you pawn i will redeem character analysis - Practical connection assignment - The undertaking john donne - Thermal analysis of disc brake ppt - List of output devices and their uses - 8 3 mystatlab final examination - Donna hae kyun lee - Coll 148 week 4 quiz - Https www 16personalities com personality types - The tollund man seamus heaney - Magdalen gates primary school - Rhetorical devices practice worksheet - The tragedy of king richard ii - BHD421-MODULE 2 CASE - Organizational Analysis Paper - Part 1 - Trench warfare lesson plan - Principles of Microeconomics - 408 primo ave sherrill ny - Approved abbreviations for nursing documentation australia - Wendy Lewis 1 - Lithium has two naturally occurring isotopes - Overlord apartments seneca falls ny - Oversize load regulations western australia - 360 Guided Learning Hours (GLH)-Level 5 Diploma in Education and training - With regard to biological or genetic differences between people, sociologists have found that: - Baxley brothers has a dso of 23 days - Cv and cp for diatomic gas - Attention catherine owen - Ivanhoe grammar general excellence scholarship - Answer question with 500 words - Is 15 prime or composite - Capstone component 1 executive summary - I m the king of the castle quotes - Medical law and ethics quiz - Colleges prepare people for life freeman hrabowski - A gearbox is to be designed with a compound - Limiting and excess reactants assembling a race car - Course Reflection - Scope of electrical engineering in germany - Project management process group and knowledge area mapping excel - Assignment Statistics - How to calculate rf value for chromatography - NRS 451-VN-0501 Nursing Leadership - Different kinds of news articles - Raaf dress manual pdf - Crop circles ielts reading answers mini ielts - 8th letter of the greek alphabet crossword clue