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

Chem skills worksheet 10 percent error

26/11/2021 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:

Accounting & Finance Mentor
Math Specialist
Assignment Hut
Phd Writer
Custom Coursework Service
Top Essay Tutor
Writer Writer Name Offer Chat
Accounting & Finance Mentor

ONLINE

Accounting & Finance Mentor

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.

$34 Chat With Writer
Math Specialist

ONLINE

Math Specialist

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.

$35 Chat With Writer
Assignment Hut

ONLINE

Assignment Hut

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.

$26 Chat With Writer
Phd Writer

ONLINE

Phd Writer

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

$30 Chat With Writer
Custom Coursework Service

ONLINE

Custom Coursework Service

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
Top Essay Tutor

ONLINE

Top Essay Tutor

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.

$21 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

María sergio, ¿quieres hacer diligencias ahora o por la tarde? - Find the z value that corresponds to the given area - Aftab iqbal family background - Legal aspects of nursing course - Human biology wace exam - Empiricist theory of francis bacon - Caves beach resort weddings - African american thesis statement - Is aluminum foil a good conductor - Ellie tomorrow when the war began - Combining form for pulse - Project - List of informative speech topics - Unit VIII Power point - Kidney shortage inspires a radical idea organ sales - Public health. - Dodd frank protocol 2.0 - Cch osha standards for general industry - Lintel span table australia - Health and social care professions council - Symbiotic relationship between deer and tick - Flipkart ebay merger case study - Hu2000 week 2 assignment the good samaritan - Ato zone offset calculator - A beautiful mind psychology assignment - Assignment: Practicum: Cover Letter, Resume, and Portfolio (Due in Week 10) - Frigel microgel chiller manual - Duopoint Analysis Of ROE for two years - CRYPTOGRAPHY - Frisco furniture warners bay - Clinical robotic surgery association - What is a windshield survey - Discussion Question - Most reactive metal in group 1 - King of birds story - Dynamics in nursing art and science of professional practice - 150 words - Map grid of australia definition - Super's self concept theory of career development - Ethnography - 632wk3d3 - The saga of erik the viking resources - Connections - Governance and Management - What is market value of a bond - Skydive software microsoft - Although in spite of - Wilmu kaltura - I need help in writing a 8-10 page paper on the Adult Learning Theories: Comparing, Contrasting, and Applying - Whistleblowers heroes or disloyal employees - How to check bridge rectifier - What happened to mildred at the end of fahrenheit 451 - Interdisciplinary work - Plc usb driver schneider - Hedging currency risks at aifs excel solution - Presentation SEC 10-K - Organizational Theory : Final Paper - What is biotic and abiotic - 2cos 3x cos 2x 2cosx 1 0 - Explain nitration of benzene with mechanism - Double block and bleed valve catalogue - Who is involved in the marketing exchange - Definition of science ppt - Calculate the magnitude of the electric field at a point 0.100 mm above the center of the sheet. - Cardinal ig fargo north dakota - Negative state relief model - Cashflow statement - What is google's reasoning for collecting your personal information - Utility program in computer - Arts & Society in Flux - Lan to wan domain security - Costco cost structure - Leaving cert music syllabus - Book of mormon bible contradictions - Threaded 2 - Bourke high school staff - Study limitations in research - Onion skin cell lab - English Introductory Outline - The Ed Roberts Campus at UC Berkeley and the community at large? - 2 traditional spanish instruments - Eyeglassomatic manufactures eyeglasses for different retailers - Dame clare tickell review - 344 coatesville riverhead highway - Arc pro attendant console - Thillana mohanambal western music - Netezza user defined functions - Mindtap - Furniture order form visual basic - Unit product cost under absorption costing - Payment link - Deep perineal pouch female - Bible verses about supply chain management - Lesson 1 history and heroes witches and warriors - Toys plus inc case study solution - Short-Writing #4 - Romeo and juliet study guide - Assignment - Taveras corporation is currently operating at - Dr jeremy freeman neurologist - Stellawood cemetery death records