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

Activity b continued from previous page answer key

29/11/2021 Client: muhammad11 Deadline: 2 Day

Student Exploration: Collision Theory

Vocabulary: activated complex, catalyst, chemical reaction, concentration, enzyme, half-life, molecule, product, reactant, surface area

Prior Knowledge Questions (Do these BEFORE using the Gizmo.)

1. Suppose you added a spoonful of sugar to hot water and another to ice-cold water. Which type of water will cause the sugar to dissolve more quickly? Hot water

2. Suppose you held a lighted match to a solid hunk of wood and another match to a pile of wood shavings. Which form of wood will catch fire more easily? ______________________

image9.jpg

Gizmo Warm-up

A chemical reaction causes the chemical compositions of substances to change. Reactants are substances that enter into a reaction, and products are substances produced by the reaction. The Collision Theory Gizmo™ allows you to experiment with several factors that affect the rate at which reactants are transformed into products in a chemical reaction.

You will need blue, green, and orange markers or colored pencils for the first part of this activity.

1. Look at the key at the bottom of the SIMULATION pane. In the space below, draw the two reactants and two products of this chemical reaction.

image10.pngReactants: Products:

2. Click Play (image11.png). What do you see? ____________________________________________

_________________________________________________________________________

_________________________________________________________________________

_________________________________________________________________________

Activity A:

Temperature

Get the Gizmo ready:

· Click Reset (image2.jpg).

· Check that the Reactant concentration is set to 1.0 mol/L, the Catalyst concentration is set to 0.00 mol/L, and the Surface area is Minimum.

image3.jpg

Question: How does temperature affect the rate of a chemical reaction?

1. Observe: Select the ANIMATION tab. View the animation with No catalyst selected.

What do you see? __________________________________________________________

_________________________________________________________________________

_________________________________________________________________________

When two reactant molecules meet, they form a temporary structure called an activated complex. The activated complex breaks up into the product molecules.

2. Observe: Return to the CONTROLS pane. Set the Temperature to 0 °C and the Simulation speed to its maximum setting. Click Play.

A. Describe the motions of the molecules. ____________________________________

___________________________________________________________________

B. Now set the Temperature to 200 °C. How does increasing the temperature affect the motions of the molecules? ___________________________________________

C. What do you notice about the chemical reaction at the higher temperature? _______

___________________________________________________________________

3. Interpret: Select the GRAPH tab. Click the zoom out button (image4.jpg) until you can see the whole graph. What does this graph show? ____________________________________________

_________________________________________________________________________

4. Predict: How do you think temperature will affect the rate of a chemical reaction? ________

_________________________________________________________________________

_________________________________________________________________________

(Activity A continued on next page)

Activity A (continued from previous page)

5. Gather data: Click Reset. A useful way to compare reaction rates is to record the time required for half of the reactants to react, called the half-life of the reaction. With the Temperature set to 200 °C, click Play. Click Pause (image5.jpg) when the number of reactant molecules is 10. Record the half-life time in the first space of the table below.

Trial

200 °C

150 °C

100 °C

50 °C

1

2

Mean half-life

Repeat the experiment at different temperatures to complete the table. (Note: To get exact times, you can refer to the TABLE tab.)

6. Calculate: Calculate the mean half-life for each temperature. Fill in these values above.

(Hint: To get an exact mean, first convert each time to seconds by multiplying the minutes value by 60 and adding this to the seconds. To find the mean in seconds, add up the two times and divide by two. Convert the answer back to minutes and seconds.)

7. Analyze: What do your results indicate? _________________________________________

_________________________________________________________________________

_________________________________________________________________________

8. Draw conclusions: For two molecules to react, they must collide at just the right angle and with enough energy to break the original bonds and form new ones. Based on these facts, why does the reaction tend to go more quickly at higher temperatures?

_________________________________________________________________________

_________________________________________________________________________

9. Apply: Paper must be heated to 234 °C to begin reacting with oxygen. This can be done by putting the paper over a flame. Why do you think the paper must be heated to start burning?

_________________________________________________________________________

_________________________________________________________________________

_________________________________________________________________________

Activity B:

Surface area and concentration

Get the Gizmo ready:

· Click Reset.

· Check that the Catalyst concentration is set to 0.00 mol/L and the Surface area is Minimum.

· Set the Temperature to 200 °C.

image6.jpg

Introduction: Reaction rates are also influenced by surface area and concentration. The surface area of a solid is a measure of how much of the solid is exposed to other substances. The concentration of a substance is a measure of how many molecules of that substance are present in a given volume.

Question: How do surface area and concentration affect reaction rates?

1. Observe: Change the Surface area from Minimum to Maximum. How does this change the amount of Reactant B molecules that are exposed to Reactant A?

_________________________________________________________________________

2. Predict: How do you think increasing the surface area will affect the rate of the reaction?

The rate of reaction increases as there are more areas to react with- imagine a perfect ice sculpter and an ice sculpter that smashed, the smashed one will melt faster as there is more heat reaching more if the sculpter

3. Gather data: Set the Reactant concentration to 2.0 mol/L. Use the Gizmo to measure the half-life of the reaction for each surface area setting. (There will now be 20 reactant molecules left at the half-life.) Then, calculate the mean half-life for each setting.

Trial

Minimum surface area

Maximum surface area

1

2

Mean half-life

4. Analyze: What do your results indicate? _________________________________________

_________________________________________________________________________

5. Explain: Why does the reaction proceed more quickly when the surface area is increased?

_________________________________________________________________________

_________________________________________________________________________

_________________________________________________________________________

(Activity B continued on next page)Activity B (continued from previous page)

6. Observe: Click Reset. Move the Reactant concentration slider back and forth. What do you notice?

_________________________________________________________________________

7. Predict: How will increasing the reactant concentration affect the rate of the reaction? Why?

_________________________________________________________________________

_________________________________________________________________________

8. Gather data: Make sure the Temperature is 200 °C and the Surface area is Maximum. Use the Gizmo to measure the half-life for each given reactant concentration. (Note that the number of reactant molecules changes with each concentration.) Calculate the means.

Trial

0.4 mol/L

0.8 mol/L

1.2 mol/L

1.6 mol/L

2.0 mol/L

1

2

Mean half-life

9. Compare: If possible, find the mean times for each concentration for your entire class. What is the mean class time for a concentration of 0.4 mol/L? How about for 2.0 mol/L?

Mean for 0.4 mol/L: ______________ Mean for 2.0 mol/L: ______________

10. Analyze: What do these results indicate? ________________________________________

_________________________________________________________________________

_________________________________________________________________________

11. Apply: Hydrochloric acid reacts with the mineral calcite to produce carbon dioxide gas, water, and calcium chloride. Based on what you have learned in activity A and activity B, what are three things you could do to make the reaction occur more quickly?

_________________________________________________________________________

_________________________________________________________________________

_________________________________________________________________________

Activity C:

Catalysts

Get the Gizmo ready:

· Click Reset (image7.jpg).

image8.jpg

Introduction: A catalyst is a substance that helps a chemical reaction to proceed. The catalyst molecules are not changed by the reaction and can be reused over and over again.

Question: How do catalysts affect the rate of a chemical reaction?

1. Observe: Select the ANIMATION tab. Select With catalyst, and observe.

A. What do you see? ____________________________________________________

___________________________________________________________________

B. Why do you think the shape of a catalyst is important? _______________________

___________________________________________________________________

___________________________________________________________________

Many catalysts have a special shape that allows them to bind to specific reactant molecules.

2. Predict: How do you think catalysts will affect the rate of a chemical reaction? ___________

_________________________________________________________________________

3. Gather data: On the CONTROLS pane, set the Reactant concentration to 2.0 mol/L, the Surface area to Maximum, and the Temperature to 50 °C. Measure the half-life for each given catalyst concentration. Calculate the means.

Trial

Catalyst concentration

0.00 mol/L

0.05 mol/L

0.10 mol/L

0.15 mol/L

1

2

Mean half-life

4. Analyze: What do your results indicate? _________________________________________

_________________________________________________________________________

_________________________________________________________________________

(Activity C continued on next page)

Activity C (continued from previous page)

5. Explore: Set the Catalyst concentration to 0.00 mol/L and the Temperature to 0 °C. Click Play, wait for 10 minutes of simulated time, and click Pause.

A. What happens? ______________________________________________________

B. Click Reset, set the Catalyst concentration to 0.25 mol/L, and click Play. After 10 simulated minutes, click Pause. What happens now? ________________________

___________________________________________________________________

C. Why do you think the catalysts allowed the chemical reaction to take place at 0 °C?

When reactants are joined by a catalyst, they no longer have to collide with much energy to react. Thus, with the catalyst present the reaction can proceed at very low temperatures.

6. Draw conclusions: What is the usefulness of catalysts? _____________________________

_________________________________________________________________________

_________________________________________________________________________

7. Apply: Most of the chemical reactions inside your body rely on protein catalysts called enzymes to take place. For example, the enzyme pepsin helps to break down protein molecules in your stomach. What might happen if your stomach stopped producing pepsin?

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:

Professional Coursework Help
Instant Assignment Writer
ECFX Market
George M.
Smart Accountants
Essay & Assignment Help
Writer Writer Name Offer Chat
Professional Coursework Help

ONLINE

Professional Coursework Help

As per my knowledge I can assist you in writing a perfect Planning, Marketing Research, Business Pitches, Business Proposals, Business Feasibility Reports and Content within your given deadline and budget.

$41 Chat With Writer
Instant Assignment Writer

ONLINE

Instant Assignment Writer

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

$16 Chat With Writer
ECFX Market

ONLINE

ECFX Market

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.

$40 Chat With Writer
George M.

ONLINE

George M.

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

$22 Chat With Writer
Smart Accountants

ONLINE

Smart Accountants

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.

$22 Chat With Writer
Essay & Assignment Help

ONLINE

Essay & Assignment Help

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

$27 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

Week 4 health care - Martha rogers theory applied to nursing practice - Community Nursing DQ Week 3 student reply Raysa Camargo - Varun sahni impact investment partners - Invertebrate diversity worksheet answers - Snhu hum 100 project 1 - Need Saturday by 5:30 pm EST 3.5 Leadership Presentation - Chemistry in context answers aquatherm pipe and fittings - Data analytics life cycle ppt - Secure software development concepts support protecting applications - Lancs grid for learning - Give me liberty an american history volume 2 chapter summaries - Aaa configuration cisco switch - I need a Research Paper - The politics of public budgeting 9th edition pdf - Alcohol dependence data questionnaire sadd - Elsewhere in america the crisis of belonging in contemporary culture - Byte of accounting inc answers - Sears holdings swot analysis 2018 - Rhetorical analysis on an article - Australian nhl hockey players - International business aviation council - 2,000 words on research methodology - Michael sean belman - Read write think bio cube - How to find a basis for column space - Invested cash and equipment journal entry - Article or video describing a new product in development - Si njay njay njay lyrics - Classifying triangles by angles - Insurance and Healthcare Reimbursement - Dr. Michelle_km - Probability of getting a black card - Comtax credit union internet banking - Manganese iv sulfate formula - Is glycolysis endergonic or exergonic - What were 3 causes of the great depression - The great gatsby essay - Usmle step 3 preparation tips - List of nursing diagnosis 2018 - William glasser theory of classroom management - Class Two: Part One - Heat pump experiment lab report - Disparities in Health Service Utilization - Www ucmp berkeley education explorations tours fossil index html - Evaluation Essay - Why do weeping willows weep math worksheet - Smarter than you think summary - Math 208 final exam - Monroe australia pty ltd - Joint affidavit sample format - Project topics on database security - Lolwa meaning - Discussion: The Nurse’s Role in Promoting Quality Health Care - Which of the following is an implicit cost - Apa citation of the aca code of ethics - Plutarch on julius caesar - Cell organelle matching worksheet - Computer Science - Jackson county senior services is a nonprofit organization - Ps4 error ws 37503 8 - Ty - The pedestrian by ray bradbury questions - Types of redox titration - Interpreter of maladies mla citation - Ward 7d royal north shore hospital - Sample business rules database design - ECO 100 - First choice financial services - Mt albert postcode nz - 7 primary chakras indian head massage - A lifestyle bloggers guide - Tech and the job search discussion - Romeo and juliet prologue translation - The beach carrier case study entrepreneurship - New south vs old south in a streetcar named desire - Ruined temple act 3 - Website content planning worksheet - Western michigan university sociology - Cisco wlc dhcp bridging mode - 10.4 to 17.0 v dc battery - Exam (new venture mgt) - Week 5 Discussion - Cherry pink and apple blossom white analysis - Ronald duska whistleblowing and employee loyalty summary - Bank albilad annual report - Baulkham hills bc post office - Alfred ledger solicitors rochdale - Suppose a life insurance company sells a - Bonnyrigg high school website - Operations management nigel slack 7th edition - City of cape town roads and stormwater department contact - Shall i compare thee to a summer's day paraphrase - Jitterbug wizard of oz dance - How to find the surface area of an octagonal prism - Psy 104 week 3 assignment - Edit My Paper Narrative Paper - Best way to remove wallpaper from plaster walls - Calculate the equilibrium concentration of fe3+ - Chamberlain 4090 hydraulic pump