catalyst 3/14 /14

Catalyst 3/14/14• On your Catalyst Sheet, please answer the following

question:

1. Based on your Alka-Seltzer Rocket lab data, how does the amount of Alka-Seltzer affect the rate (speed) of the reaction?

2. Based on your Alka-Seltzer Rocket lab data, how does the temperature of the water affect the rate (speed) of the reaction?

• When you are done, raise your hand quietly for a stamp.

LECTURE 8.1 – RATES OF REACTION

Today’s Learning Targets• LT 8.2 – I can describe the rate of a reaction using

the ideas of concentration of reactants, concentration of products, and time. I can explain how the collision theory impacts rate of reaction.

Today’s Focus Question• What is the typical rate at which

food decomposes?

What is a reaction rate?

I. Rate of Reaction• A rate describes how fast something

changes with time.• Reaction rate is measured either by

the rate of formation of product or the rate of disappearance of the reactants.

What are ways to impact the rate of reaction?

I. Concentration, Temperature, Pressure, and Rate

• As concentration , the rate also increases

• As temperature , the rate also increases.

• As pressure , the rate also increases.

• This is due to the increased amount of collisions

How is collision theory related to rates?

I. Collision Theory• Reactions occur when molecules collide.• Therefore, more collisions, a faster overall

rate of reaction. Less collisions, a slower rate.

White Board QuestionsH2 + Cl2 2HCl

• The rate can be described as the decrease of _____ with time

H2 + O2 H2O• The rate can be described as the

increase of _____ with timeNaOH + HCl H2O + NaCl

• The rate can be described as the decrease of _______ with time

White Board QuestionsH2 + Cl2 2HCl

• If I increase the concentration of H2, how will the rate change?

• If I decrease the pressure, how will the rate change?

• I heat the container, how will the rate be changed?

• I decrease the amount of Cl2, how will the rate change?

Mid-Class Exit Slip1. What is collision theory and how is

it related to rates? (2 complete sentences)

2. As pressure increases, reaction rate will ______.

3. As temperature decreases, reaction rate will ______.

Hand Back Unit Exams• If you have not taken the unit exam,

please take this time now to make it up in another classroom.

LastName_FirstName• Mosley_Daniel• Pan_Kevin

• Share with kpan@luskinacademy.net

Lab Report Structured Work Time

• You will be using the rest of the time in class to work on your lab reports on your iPads or laptops

• You must upload a rough draft onto my Google Drive at the end of class for credit!

• Your rough draft must include at least:– A brief, concise title (2 min)– A full introduction (statement of the problem)

(20-30 min)– Your materials & methods (10-15 min)

Directions1. Open up this Google Drive site:

http://goo.gl/jrxdvp2. Click on “Add to Drive” button. (If you don’t have

a Google account please make one and sign in)3. Go to your Google Drive on your iPad4. Create document (+ sign on upper right)5. Name your document “LastName_FirstName”

(for example: Pan_Kevin)6. Hit blue “Share” button on top right. Share with

kpan@luskinacademy.net . 7. Start writing your rough draft. Make sure to save

frequently.

Lab Report Structured Work Time

1. Take out these 4 materials:– Hot Cheetos Calorimetry Lab handout– Mr. Pan’s sample college-level lab report– Lab report template & rubric– Laptop or iPad

2. Your rough draft must include at least:– A brief, concise title (2 min)– A full introduction (20 – 30 min)– Your data table(s) (10-15 min)

3. Laptop/iPad expectations:– NO off-task websites or applications (Youtube,

Photobooth, etc.)– Your iPad/laptop will be taken away for severe violations

Upload your draft!1. Switch to Desktop version2. Make sure your rough draft is named

“LastName_FirstName” (for example, Pan_Kevin)

3. Click the “Share” button on the top right.4. Make sure my email (

kpan@luskinacademy.net) can view your document

5. Hit “Done.”