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

How to do a chemistry lab report

06/12/2021 Client: muhammad11 Deadline: 2 Day

Acid-Base Chemistry

Hands-On Labs, Inc. Version 42-0137-00-03

Lab Report Assistant

This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.

Exercise 1: Using pH Paper and the Indicator Bromothymol Blue (BTB)

Data Table 1. Data Collected from Exercise 1.

ID Number

Chemical Name

Chemical Formula

Hypothesis: Acid or Base

pH

BTB Color

Acid or Base?

11A

Acetic acid

CH3COOH

Acid

pH 2

Yellow

Acid

11B

Nitric acid

HNO3

Acid

pH 3

Yellow

Acid

11C

Sulfuric acid

H2SO4

Acid

pH 3

Yellow

Acid

11D

Phosphoric acid

H3PO4

Acid

pH 2

Yellow

Acid

11E

Sodium acetate

CH3COONa

Base

pH 7

Blue

Base

11F

Sodium bicarbonate

NaHCO3

Acid

pH 8

Blue

Base

11G

Sodium dihydrogen phosphate

NaH2PO4

Base

pH 0

Yellow

Acid

11H

Sodium hydrogen sulfate

NaHSO4

Acid

pH 6

Yellow

Acid

12A

Sodium hydrogen sulfite

NaHSO3

Acid

pH 5

Yellow

Acid

12B

Limewater

Ca(OH)2

Base

pH 9

Blue

Base

12C

Sodium phosphate

Na3PO4

Base

pH 13

Blue

Base

12D

Sodium hydrogen phosphate

Na2HPO4

Base

pH 7

Blue

Base

12E

Ammonium hydroxide

NH4OH

Base

pH 8

Blue

Base

12F

Hydrochloric acid

HCl

Acid

pH 2

Yellow

Acid

12G

Sodium carbonate

Na2CO3

Base

pH 10

Blue

Base

12H

Sodium hydroxide

NaOH

Base

pH 12

Blue

Base

Questions

A. When you created hypotheses to guess whether each chemical was an acid or base, what specifically did you look for in the chemical formulas?

I looked for OH- or H+ in the formula and if it was an H+ than the chemical is most likely acidic and OH- would be basic.

B. What is the value of using pH paper as an indicator?

You could find if it were a weak or strong acid or base by looking at the pH paper. With the pH paper, you would be able to determine the substances pH value number and not just if it’s acidic or basic.

C. What is the value of using BTB as an indicator? When might BTB be a better choice than pH paper?

To figure out the pH value we must add the BTB, green means it's natural, blue is base, and yellow is acidic. It’s useful to do this whenever you want to know if any chemical is acidic or basic.

D. Write the chemical equation of mixing nitric acid (HNO3) with water.

HNO3 (aq)+ H2O(aq) <—>H3O++NO3-

E. Write the chemical equation of mixing ammonia (NH3) with water.

NH3(aq) H2O —>NH4+(aq)+ OH-(aq)

F. What are the conjugate acids and conjugate bases of questions D and E?

The conjugate bases of D and E are NO3-and OH

Exercise 2: Acid-Base Reactions

Data Table 2. Acid-Base Reactions.

Row

1

2

3

4

5

6

A HCl

pH:

11

pH:

10

pH:

10

pH: 9

# drops NaOH:

5

B CH3COOH

pH:

0

pH:

9

pH:

0

pH: 12

# drops NaOH:

6

C C,H2SO4

pH:

6

pH:

9

pH:

11

pH:

14

pH:

13

pH: 12

# drops NaOH:

9

D H3PO4

pH:

2

pH:

5

pH:

6

pH:

6

pH:

12

pH: 7

# drops NaOH:

12

Questions

A. Visually analyze the wells in the plate. What information can be gleaned from each well based on the color of the BTB indicator after each reaction has occurred? How do you know if neutralization has occurred? Cite examples from the well plate reactions to support your answer.

Neutralization has happened when the resulting solution's pH will be less than 7. While looking at the reaction in the wells, you could see the BTB reacting with the chemical the color change can indicate the Neutralization has happed. But I think the most effective way was to use the pH test strip to determine the pH level to see if Neutralization has happed.

B. What factors determine if neutralization occurs during an acid-base reaction?

A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water. The neutralization of a strong acid and strong base has a pH equal to 7.

C. Is the pH at the equivalence point always equal to 7? Explain your answer based on your experimental observations. Include a discussion of equivalence point pH values for strong versus weak acids.

There is no motivation behind why the pH ought to be seven at the equivalence point except if the acid being titrated is a strong acid, and the base from the Burette is a solid base. On the off chance that you are titration a frail acid with a solid base, the items will be a weak base and an exceptionally weak acid. So, pH will be >7.

D. In all the chemical reaction performed in Exercise 2, neutralization occurs when the pH is neutral (7) or basic (>7). Did any of the reaction not result in a color change of the BTB indicator from yellow (acid) to blue (base)? Explain why neutralization may not have occurred in one or more reactions.

I feel that some the chemicals that were neutralized combined well with the BTB resulting in their chemical reaction to be neutral as it is neither acidic nor alkaline and some did not blend because it may have been a weak acid it does not dissociate fully when it is dissolved.

Exercise 3: Testing the pH of Household Products

Data Table 3. Household Acids and Bases.

Household substance

Prediction:

(Acid, Base, or Neutral)

pH Value

Conclusion:

(Acid, Base, or Neutral)

Coffee w/Cream

Acid

pH 7

Neutral

Soda (Coke)

Acid

pH 3

Acid

Bleach

Base

pH 10

Base

Lysol

Acid

pH 7

Neutral

Isopropyl

Acid

pH 5

Acid

Questions

A. What properties did you use to determine whether the substances you tested were acid or base?

What I used were the pH strips to help me conclude whether the chemical/product I tested was acid or base.

B. Did any of your findings surprise you? Why or why not?

I was surprised by the coffee since the result came out to be neutral. I have always been told that it was acidic due to what it does to your teeth in long-term. But after thinking about it since there was cream in the coffee, it may have canceled the acidity in the coffee that would have made it an acid. Another one that I was surprised with was the Lysol since it is a cleaner, I thought it would be acidic to be able to clean thoroughly and remove all the grams.

My Findings

After working on this lab, I learned that not all things that you have been told might be correct for instance when I did the test on the coffee with cream it did not come out to be acidic. After thinking about it, I came up with a hypothesis that I wanted to test to see if I was correct and to my findings, I was right. So, I knew that the coffee I tested was not acidic with the cream. I took it upon myself to test another coffee without the cream, and the result was that black coffee is more acidic, I used a pH strip to check the coffee, and the result was a pH leave of 5 making it acidic. In conclusion, if you would like a coffee with less acidity add some cream to cancel it out.

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:

Quick N Quality
Chartered Accountant
Engineering Guru
Isabella K.
University Coursework Help
Quick Mentor
Writer Writer Name Offer Chat
Quick N Quality

ONLINE

Quick N Quality

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

$43 Chat With Writer
Chartered Accountant

ONLINE

Chartered Accountant

I have worked on wide variety of research papers including; Analytical research paper, Argumentative research paper, Interpretative research, experimental research etc.

$26 Chat With Writer
Engineering Guru

ONLINE

Engineering Guru

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

$41 Chat With Writer
Isabella K.

ONLINE

Isabella K.

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

$39 Chat With Writer
University Coursework Help

ONLINE

University Coursework Help

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.

$29 Chat With Writer
Quick Mentor

ONLINE

Quick Mentor

I have assisted scholars, business persons, startups, entrepreneurs, marketers, managers etc in their, pitches, presentations, market research, business plans etc.

$44 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

Effect of chemical germicides on bacterial growth - How ERM can be integrated with an organization’s overall strategy. - Summary of the poem birches by robert frost - Conventional representation of an element - Rank the vector combinations on the basis of their magnitude - A caesar cipher locates the coded text of a plaintext character - Subtraction snakes and ladders - Financial accounting - Definition Essay - Too big to fail free movie - 1.6 a finding the four words prepositions quizlet - Sparknotes dr jekyll and mr hyde chapter 8 - Fit a straight line to the following data - Plato's myth of the cave demonstrates that ________ - Discussion 8 - Bill and joyce schnappauf tax return - 2.1 connecting the dots piggies and pools answer key - Https www eeoc gov laws statutes titlevii cfm - Developing Organizational Policies and Practices - Essay - Who controls citizens lives in a totalitarian government - Stores material within the cell - Abner's lectures - Marks origins of the modern world - Waren sports supply bank reconciliation - Suppose you ve just inherited $10 000 from a relative - What should be included in child observation - Camp counselor cover letter - Urgent - Camilla big brother turkey slap - Change proposal - Acknowledgement form walden university - Fn wk 8 - Week 08 Discussion - Coney beach porthcawl accident - Existentialism activities for groups - Accounting 1 final exam questions - Fish names in australia - Give a two sentence summary of how turnitin com works - Entrapment defense case briefs - Exoplanets are planets that _____ - Practice b ratio in similar polygons - Police Liability - Aprn scope of practice in florida - Richard bandler shamanic states - Vocotion - Shadow health cheat sheet - Competency based recruitment and selection ppt - University of montana villages - Jimmy rogers bim bom bay - The proverbs tell us how to live life successfully - How to graph x 2 6x - Boston scientific gold probe electrical connector - Strategic business unit of nike - Abas 3 reliability and validity - Dmaic summary - Unit test part 2 functions - Geography of tourism uwo - Different styles of drama - What is the basic building block of society - Right Academics - Clinical Field Experience D: Assessment and Reflection - Research Paper Big Data Analytics - Xilinx ise 14.7 tutorial - Women's danton faux leather pull on bootie universal thread - Kim Woods only - How many syllables in animals - Greenwash's Wish List - Strategy and hrm at delta airlines case study - Whole foods competitive strategy - Paper 2 OP - Tax agent fast key codes - American red cross swot analysis - Charlie echo delta alphabet - Discussion 2 - Tm 9 1220 254 13&p - How much phenol red to add to media - 34 little turriell bay road - Describe the geography of ancient greece - Does every rock go through the complete rock cycle - Taclane kg 175d configuration - Emerging concepts that are using Big Data and Blockchain Technology - OE_Week_10_Discussion - Comic strip lesson plan - Civilization - Talis library management system - Introductory personal finance unimelb - Westjet the pearson decision case analysis - Two Assignment so be completed - Weighted average cost of capital problems and solutions pdf - HIST CA 12 - Primary and secondary target market - Gram staining method lab report - The asset demand for money is downsloping because - Staffordshire university human resources - Dr elahi before and after - The simpsons marge opens a sandwich shop - Cocker spaniel rage syndrome - Eastern districts tennis association - A partnership has the following capital balances