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

Student exploration half life answer key activity b

25/03/2021 Client: saad24vbs Deadline: 3 days

Name: ______________________________________ Date: ________________________

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

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 LAND
Best Coursework Help
Ideas & Innovations
Accounting & Finance Master
Smart Homework Helper
Top Academic Tutor
Writer Writer Name Offer Chat
WRITING LAND

ONLINE

WRITING LAND

You can award me any time as I am ready to start your project curiously. Waiting for your positive response. Thank you!

$76 Chat With Writer
Best Coursework Help

ONLINE

Best Coursework Help

You can award me any time as I am ready to start your project curiously. Waiting for your positive response. Thank you!

$28 Chat With Writer
Ideas & Innovations

ONLINE

Ideas & Innovations

I have read your project details. I can do this within your deadline.

$74 Chat With Writer
Accounting & Finance Master

ONLINE

Accounting & Finance Master

I have read and understood all your initial requirements, and I am very professional in this task.

$107 Chat With Writer
Smart Homework Helper

ONLINE

Smart Homework Helper

Give me a chance, i will do this with my best efforts

$93 Chat With Writer
Top Academic Tutor

ONLINE

Top Academic Tutor

You can award me any time as I am ready to start your project curiously. Waiting for your positive response. Thank you!

$71 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

Nursing Care Plan - The permissible bending stress in steel is - Abc o and p - Family health history - Security incident and event management ppt - Livingston company is a wholly owned subsidiary of rose corporation - History of corrugated iron in australia - Public budgeting systems 9th edition - Monthly manufacturing overhead flexible budget - Is cellular respiration autotroph or heterotroph - P5 explain the concept of homeostasis - Laboratory techniques lab answers - How to do homework when sick - Association of massage therapy - Cebm levels of evidence - D2l uwm milwaukee - Rhetorical Analysis - What criteria concerning moral judgments should we agree with - Fiscal planning and management - How many mcg is 0.25 mg - Plot the supply curve and the demand curve for bicycles - Healthcare Problem-Solving Using Analytics - Unknown times - Tech talk case study solution - Grease script online free - All logic gates and truth table - Melvin tumin social stratification - SUPPLY CHAIN - Challenger moodle login - What are the 12 polygons - How to evenly distribute columns in word - Isaiah 65 17 25 - Collingwood english language school craigieburn - Personal experience speech outline - Order 2211125: Research Methods - Cven assignment cover sheet - 1 sin x half angle formula - Draft - Budget variance analysis excel - Discussion question #1-4 When submitting work, be sure to include an APA cover page and include at least two APA formatted references (and APA in-text citations) to support the work this week. All work must be original (not copied from any source). - Defi smart adapter w - Metal activity and reactivity oxidation and reduction reactions lab answers - How to install excel qm - Single display performance mode - HR - Annotated Bibliography 1 - Child family school community 8th edition - Luke o curry airdrie - BUSN601 - College algebra by carl stitz and jeff zeager - 1932 craigmore drive charlotte nc - Hard capital rationing and soft capital rationing - Essay - David schanzer wikipedia - WK4:0915 - Personality assignment psyc 101 - Vaccines should not be mandatory essay - Bible (MUST be able to download book!!!!!) - Sika anchorfix 2 msds - Performance evaluation of mutual funds using sharpe treynor and jensen - Single arm cable curl jeff nippard - I am legend free book - Organizational development case study analysis - How to calculate outright quotes for bid and ask - Jean watson's theory in practice - Mississippi spelling song matilda - Ati video case study levels of prevention - Comparison of presidential healthcare agendas - Nursing Project - Due today by 10pm - To create common ground with an audience in the introduction - Normal probability plot minitab - Paper doll a view from the bridge - Nursery rhymes about plants - Discussion Board - Deviant place theory of victimization - Barnsley vs accrington stanley - Ads that appeal to pathos - Final Exam - HIST102 – American History since 1877 - Communicating effectively with aboriginal and torres strait islander people - What is enterprise gcse - Stephen hillenburg rules for spongebob - Remember the titans movie worksheet answers - Q3 - Olfactory organ crossword clue - Structure of a persuasive speech - Beck depression inventory test questions - The author to her book - Analytical term outline - Cert 3 guarantee tafe qld - Application Security PCA - Allegory of the cave multiple choice questions answers - Civilization - What are the seven elements of an effective compliance program - Real people real choices 7th edtion - Business ethics richard degeorge pdf - FIN-311 (1207-11813) PRINCIPLES OF FINANCE - Energy of electron in hydrogen like atom - Medical Nutrition Therapy for an HIV Patient - Women and power essay - Practical Connection Assignment