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

Chemistry lab introduction to measurement answer key

16/11/2021 Client: muhammad11 Deadline: 2 Day

Final Report

Exercise 1

CHEM 181 DL1 Laboratory Techniques and Measurements

The reason could be atmospheric pressure changes with the higher sea levels, decreasing the degree at which it takes water to boil.

1. Water boils at 100°C at sea level. If the water in this experiment did not boil at 100°C, what could be the reason?

100(102-100)/100=2% error

100(99.2-100)/100=-0.8% error

2. While heating two dif f erent samples of water at sea level, one boils at 102°C and one boils at 99.2°C. Calculate the percent error f or each sample f rom the theoretical 100.0°C.

Copyright 2019 - Hands-On Labs | http://holscience.com 2 / 14

Data Table 1: Length Measurements

Data Table 2: Temperature Measurements

Length (cm)

CD or DVD

Key

Spoon

Fork

Length (mm)

CD or DVD

Key

Spoon

Fork

Length (m)

CD or DVD

Key

Spoon

Fork

12

5.5

18

18

120

55

180

180

0.12

0.055

0.18

0.18

Temperature (°C)

Hot from Tap

Boiling

35

Copyright 2019 - Hands-On Labs | http://holscience.com 3 / 14

Boiling for 5 minutes

Cold from Tap

Ice Water - 1 minute

Ice Water - 5 minutes

Temperature (°F)

Hot from Tap

Boiling

Boiling for 5 minutes

Cold from Tap

Ice Water - 1 minute

Ice Water - 5 minutes

Temperature (K)

Hot from Tap

Boiling

Boiling for 5 minutes

Cold from Tap

Ice Water - 1 minute

Ice Water - 5 minutes

85

100

20

2

-1

95

185

212

68

35.6

30.2

308.15

358.15

373.15

293.15

275.15

271.15

Copyright 2019 - Hands-On Labs | http://holscience.com 4 / 14

Data Table 3: Mass Measurements

Estimated Mass (g)

Pen or Pencil

3 Pennies

1 Quarter

2 Quarters, 3 Dimes

4 Dimes, 5 Pennies

3 Quarters, 1 Dime, 5 Pennies

Key

Key, 1 Quarter, 4 Pennies

Actual Mass (g)

Pen or Pencil

3 Pennies

1 Quarter

2 Quarters, 3 Dimes

4 Dimes, 5 Pennies

3 Quarters, 1 Dime, 5 Pennies

Key

Key, 1 Quarter, 4 Pennies

Actual Mass (kg)

Pen or Pencil

4

8

4

12

21

30

7

18

5.6

7.5

5.6

18

22.1

32.3

7.7

24

Copyright 2019 - Hands-On Labs | http://holscience.com 5 / 14

Exercise 2

3 Pennies

1 Quarter

2 Quarters, 3 Dimes

4 Dimes, 5 Pennies

3 Quarters, 1 Dime, 5 Pennies

Key

Key, 1 Quarter, 4 Pennies

0.0056

0.0075

0.0056

0.018

0.0221

0.0323

0.0077

0.024

Density= mass/ volume

Volume= length x width x height

Volume= 3.6 x 4.21 x 1.17= 17.73 cm

Density= 21.3/17.73= 1.20 g/mL

1. An unknown, rectangular substance measures 3.60 cm high, 4.21 cm long, and 1.17 cm wide. If the mass is 21.3 g, what is this substance’s density (in grams per milliliter)?

3

Copyright 2019 - Hands-On Labs | http://holscience.com 6 / 14

Density= mass/volume

Volume= mass/ density

Volume= 26.15/19.30= 1.35 mL Au

2. A sample of gold (Au) has a mass of 26.15 g. Given that the theoretical density is 19.30 g/mL, what is the volume of the gold sample?

If you dropped the object into the beaker then the scale would measure the mass of the object instead of the mass of the displaced water and the measurements would be thrown off.

3. What would happen if you dropped the object into the beaker while using the Archimedes’ Principle method instead of submerging the object?

How the magnets density measurement using the Archimedes principles compare to the density measurement using the calculated volume is that the magnets density measurement during the Archimedes was higher than the density measurement using the calculated volume. I think that the Archimedes principle method might be more accurate because with the calculated volume there is more room for error as I made the measurements.

4. How did the magnet’s density cdalculation using the Archimedes’ Principle compare to the density calculation using the direct measurement method? Which technique might be more accurate? Why?

Copyright 2019 - Hands-On Labs | http://holscience.com 7 / 14

Data Table 4: Liquid Measurements

The conclusions I can reach from the simple density analysis is that is could not actually be gold because pure gold is 19.32 g/cm .

5. You are given a small piece of gold colored material and want to determine if it is actually gold. Using the Archimedes Principle you f ind that the volume is 0.40 cm and the mass is 6.0 g. What conclusions can you reach f rom your simple density analysis?

3

3

Water

Mass A: Graduated Cylinder (g)

Volume (mL)

Mass B: Graduated Cylinder with Liquid (g)

Mass B-A: Liquid (g)

Density (g/mL)

Percent Error (%)

Isopropyl Alcohol

Mass A: Graduated Cylinder (g)

Volume (mL)

Mass B: Graduated Cylinder with Liquid (g)

Mass B-A: Liquid (g)

Density (g/mL)

Percent Error (%)

19.3

5

24.4

5.1

1.00

26.4%

19.3

5

23.6

4.3

0.786

22.3%

Copyright 2019 - Hands-On Labs | http://holscience.com 8 / 14

Data Table 5: Magnet - Direct Measurement Method

Data Table 6: Water Displacement Method

Magnet

Mass (g)

Length (cm)

Width (cm)

Height (cm)

Volume (cm )

Density (g/cm )

4.2

2.5

0.5

2.5

3 3.125

3 1.344

Copyright 2019 - Hands-On Labs | http://holscience.com 9 / 14

Data Table 7: Archimedes' Method

Magnet

Mass (g)

Initial Volume of Graduated Cylinder (mL)

Final Volume of Graduated Cylinder (mL)

Object Volume (mL)

Density (g/mL)

Metal Bolt

Mass (g)

Initial Volume of Graduated Cylinder (mL)

Final Volume of Graduated Cylinder (mL)

Object Volume (mL)

Density (g/mL)

4.3

6

6.5

0.5

8.6

8

6

7

1

8

Copyright 2019 - Hands-On Labs | http://holscience.com 10 / 14

Exercise 3

Magnet

Mass (g)

Mass of Displaced Water (g)

Volume of Displaced Water (mL)

Density (g/mL)

Metal Bolt

Mass (g)

Mass of Displaced Water (g)

Volume of Displaced Water (mL)

Density (g/mL)

4.3

121.4

121.4

1

8

121.8

121.8

1

Copyright 2019 - Hands-On Labs | http://holscience.com 11 / 14

Data Table 8: Initial Concentration

1% x V1 = 2% x 2V

0.25 x 10 = 1 x 2V

V2= 0.25 x10/1

V2= 2.5mL

How I would prepare 10 mL of a 0.25% HCl solution if 1% HCl available is dilute the 1% in water to get a less concentrated .25% HCl. Then determine the amount of moles by multiplying 0.01 and .25 which equals 0.0025 moles HCl. Then, you prepare 10 mL containing 2.5 mL of 1% HCl.

1. How would you prepare 10 mL of a 0.25% m/v HCl solution if 1% m/v HCl was available? How much 1% m/v HCl is needed? How much distilled water is used?

The relations between the concentration of the sugar solution and the density of the sugar solution is that the density is a lot higher than the comcentration.

2. From the graph of Density vs. Concentration, created in Graph 1, what was the relationship between the concentration of the sugar solution and the density of the sugar solution?

Copyright 2019 - Hands-On Labs | http://holscience.com 12 / 14

Data Table 9: Solutions

Sugar (C H O )

Mass of Volumetric Flask (g)

Mass of Sugar (g)

Total Volume (mL)

Concentration (% m/V)

12 22 11

19.3

8

0.025

0.92%

Solution Volume (mL)

0 25.00 mL

1 25.00 mL

2 25.00 mL

3 25.00 mL

4 25.00 mL

Solution Mass (g)

0

1

2

3

4

Solution Density (g/mL)

0

1

26.5

25.3

25.4

25.4

25.5

1.06

Copyright 2019 - Hands-On Labs | http://holscience.com 13 / 14

2

3

4

Solution Initial Concentration (% m/v)

0

1

2

3

4

Solution Volume Transferred (mL)

0

1

2

3

4

Solution Final Concentration (% m/v)

0

1

2

3

1.012

1.016

1.016

1.02

0.92%

2.9%

2.9%

2.9%

0

2.5

4.5

3

6

0.925

2.9%

13.05%

Copyright 2019 - Hands-On Labs | http://holscience.com 14 / 14

Graph 1: Density versus Concentration

4

8.7%

17.4%

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:

Writing Factory
Essay Writing Help
Assignments Hut
ECFX Market
Smart Homework Helper
Write My Coursework
Writer Writer Name Offer Chat
Writing Factory

ONLINE

Writing Factory

I have done dissertations, thesis, reports related to these topics, and I cover all the CHAPTERS accordingly and provide proper updates on the project.

$44 Chat With Writer
Essay Writing Help

ONLINE

Essay Writing Help

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.

$38 Chat With Writer
Assignments Hut

ONLINE

Assignments Hut

I can assist you in plagiarism free writing as I have already done several related projects of writing. I have a master qualification with 5 years’ experience in; Essay Writing, Case Study Writing, Report Writing.

$31 Chat With Writer
ECFX Market

ONLINE

ECFX Market

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.

$16 Chat With Writer
Smart Homework Helper

ONLINE

Smart Homework Helper

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.

$38 Chat With Writer
Write My Coursework

ONLINE

Write My Coursework

I will provide you with the well organized and well research papers from different primary and secondary sources will write the content that will support your points.

$45 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

Kaizen advantages and disadvantages tutor2u - Essay - 7 eleven application form - Find remaining zeros of f degree 3 - Moc management of change - Innovative health care delivery model - Human resource process - Stemplosion - Cardboard containers aust pty ltd - What does gns mean in shops - Seismic refraction method ppt - Shall i compare thee poem analysis - Non return valves water regulations - Calculus - Las vegas sands swot analysis - Powerpoint assignment PH.D LEVEL - Tort LAw - The “four ps” to consider in choosing a financial institution include product, price, people, and - Theories - 5 5 practice the triangle inequality - Bbc dance mat typing 1 - The danger of a single story analysis essay - ME - Main - Week 5 - Homework 1 & 2 - Macbeth act 4 scene 3 summary - A hypodermic injection of epinephrine would - Biomet 3i impression coping - 3.2 kg to lbs - Police rotating shift schedule - Autodesk inventor icons list - ASSESSMENT 3 DUE IN 48 HOURS - Hg2 3 po4 2 - The oldest pilot module c answers - How did the renaissance change history - 3 resources - Xamarin free vs paid - N491 Assignment Mod 8 - Chapter Eleven: Adam Smith and Capitalism - Zelda ocarina of time where to get sword - Writing prompts to kill a mockingbird - Mitosis and meiosis lab 5 answers - Daddy long legs musical bootleg - What are the rules of beer pong - Ge nine cell planning grid in strategic management - Ocn london access to he - Biology - 4.1 compute gross profit for april - Dishonored basement vault key boyle estate - DM fin - Unsw electrical engineering handbook - Sociology Observational Research Assignment - Final paper - How did theodore roosevelt's corollary influence us foreign policy - Ramort company reports the following - Hom herbalife 2018 ppt - Map application process of arapu - A practical approach to supply chain risk management - Yellow fever - Like the modernists postmodern writers focused on - Determination of water hardness by edta titration calculations - Communication - The wall street journal classroom edition chapter 1 answers - The accounting process involves all of the following except - List of fabian entrepreneurs - Jumbled words with answers - Final Project Milestone Three: Global HR, Diversity, Risk Management, and Social Responsibility - Discussion - Topic: Antibodies - Week 8 - Assignment: Signature Assignment: Develop an Organizational Intelligence (OI) Policy - Essay about driving a car - What was cicero known for - International marketing mcgraw hill - Interact with real-world professionals - Maersk line case study analysis - What is the square root of 526 - Harley 5 speed transmission shifter pawl adjustment - Research paper - Little hans case study - 1. Letter format (1 page) 2. Short essay for the 2 selected paragraph (1 page) - Table 3 dichotomous key results - In exercise 6.1, how do you enable efs? - WEEK 11 SCI - Lash and brow boudoir 204 church st richmond vic 3121 - Anya diablo 2 personalize - Computer lab equipment list - Deskjet 2510 all in one series - Why did montag go to see faber in fahrenheit 451 - Robin hood homework - S rozhdestvom kristovym russian - Design a charge amplifier for a piezoelectric sensor - Dental technician tool kit - Factors that affect enthalpy - C++ program for taylor series - Lord of the flies pig on a stick - Powder toy property edit tool - The men we carry in our minds analysis - Biology corner worksheets answers - Hdsentinel_pro_setup - HAMMANSKRALL ABRTION CLINIC +27717852514 ABORTION PILLS FOR SALE IN PRETORIA, MAMELODI, SHOSHANGUVE, JOHANNESBURG, - Renegade dreams chapter 2 summary - 9/11