First Day of Chemistry - Weebly

First Day of Chemistry - Weebly

Chemistry A. Stanford Welcome to Chemistry! Find a seat (not permanent!) Start working on the

getting to know you worksheet. Objective: Having completed the kick start machine challenge, students will be able to create a machine to complete a task in order to prepare for laboratory group work in chemistry. What is Chemistry?

Build a machine that kicks a Ping-Pong ball into a cup lying on its side 12 inches away. Use either a pendulum, a rubber band, or a combination of the two. Exit Ticket

On the back of the Getting to Know You sheet What is one thing you are looking forward to this year? Warm Up 1. Get a computer and start to login. 2. What are your thoughts about this picture?

How do you think it relates to our science class? Objective: The student will be able to define chemistry in order to discuss how chemistry plays a role in their life. Class Website! astanfordscience.weebly.com

What is Chemistry? You will watch the YouTube videos and answer the corresponding questions. Be prepared to share your findings with the class. Pre-Testbut its not a test!

Safety! Warm Up 8/28 8/31

Objective: After completing the safety portfolio students will be able to demonstrate safe lab procedures in order to conduct laboratory investigations. Question: What do these pictures have in common?

Warm Up 8/28 Objective: After completing the safety portfolio students will be able to demonstrate safe lab procedures in order to conduct laboratory investigations.

Question: What do these pictures have in common? Answer: They are all undergoing physical changes Safety Video

Lab Safety Portfolio All materials are on the class website: astanfordscience.weebly.com Paper, pencils,

scissors, etc. are located by lab station 1. Be prepared to turn in your portfolio on Tuesday!

Warm Up 9/1/15 9/2/15

Objective: The student will separate matter into elements, compounds, solutions, and heterogeneous mixtures into order to classify matter by creating a flow chart for matter. Question:

Name the following items: Lab Safety Portfolio Nuts & Bolts of Matter

Task: Your job is to look at the 9 petri dishes containing different kinds of nuts, bolts, and washers and attempt to classify each of them as representing an element, a compound, a mixture of elements, a mixture of compounds, or a mixture of elements and compounds. NGSS Models:

Classification of Matter Video Notes http://www.schooltube.com/video/ 2f8c4fb496a44694818d/Classification%20of %20Matter

Practice Problems Part 1 Warm Up Objective: SWBAT describe indicators of a physical and chemical change by completing the experimental

observation lab. Review Math Pre- Test Video Notes http://www.schooltube.com/video/ 5811ef0b5cfd4b87b8a7/Physical%20&

%20Chemical%20Properties%20&%20Changes %20of%20Matter Experimental Observation Lab Color A Physical

B Chemical C Undecided Hardness/Breaking A Physical B Chemical C Undecided

*Solubility/Dissolving A Physical B Chemical C Undecided State

A Physical B Chemical C Undecided Ability to Burn/Burning A Physical B Chemical

C Undecided Melting Point/Melting A Physical B Chemical C Undecided

*Ductility/Bending A Physical B Chemical C Undecided Ability to Decompose/Decomposing A Physical

B Chemical C Undecided Mass A Physical B Chemical C Undecided

Ability to React/Reacting A Physical B Chemical C Undecided *Malleability/Flattening

A Physical B Chemical C Undecided *Conductivity A Physical B Chemical

C Undecided Volume A Physical B Chemical C Undecided

Ability to Rust/Rusting A Physical B Chemical C Undecided Acidity A Physical

B Chemical C Undecided Ability to Rot/Rotting A Physical B Chemical C Undecided

*Luster A Physical B Chemical C Undecided Length

A Physical B Chemical C Undecided Combustion A Physical B Chemical

C Undecided Boiling Point/Boiling A Physical B Chemical C Undecided

*Density A Physical B Chemical C Undecided Properties that do not change the chemical nature of matter.

A Physical B Chemical C Undecided Properties that do change the chemical nature of matter. A Physical

B Chemical C Undecided Intensive Properties: Properties that do not depend on the amount of matter present. Which of the following is NOT an intensive

property of matter? A Color B Chemical potential C Mass D Boiling point Extensive Properties: Properties that do depend on the amount of

matter present. Which of the following is NOT an extensive property of matter? A Density B Mass C Volume

D Length HW: Scientific Notation Notes Warm Up Objective: SWBAT design an experiment using the differences in physical properties of substances in order to separate a mixture.

1. Classify the following properties as chemical or physical. A. heat conductivity __________ D. length _____________ B. combustibility ____________ E. brittleness ______________ C. resistance to acids __________ F. malleability ______________ 2. Classify the following changes as chemical or physical.

A. boiling alcohol ____________ D. frying an egg _____________ B. tarnishing of silver _________ E. burning wood _____________ C. making salt water ___________ F. baking a cake ______________ * you have a quiz on classification of matter & physical/chemical changes next class * Objective: SWBAT design an experiment using the differences in physical properties of substances in order to separate a mixture.

II. Classify the following properties as chemical or physical. heat conductivity chemical combustibility chemical resistance to acids chemical length physical

brittleness physical malleability physical III. Classify the following changes as chemical or physical. boiling alcohol physical tarnishing of silver chemical making salt water physical

frying an egg chemical burning wood chemical baking a cake chemical Experimental Observation Lab Recap Seeing is not observing

What do you think about this statement? What makes an observation good? Chemical Spill There are three components in the mixture before you. Using only observation, predict the identity of each component.

http://www.cbsnews.com/videos/w-vachemical-spill-cuts-water-to-300k-forcesclosures Background: You are a method development chemist, employed by a waste disposal company that has been hired to clean up a chemical spill resulting from a train derailment. The derailment occurred in Havre de Grace over the sandy Chesapeake Bay shoreline.

During the accident cleanup, roughly a quarter ton of iron was combined with a ton of CARBOSE, a water soluble salt being developed by a defense contractor. A significant quantity of sand was also collected in the removal of the mixture. Since CARBOSE is patent pending, the defense contractor would like it back. You and your team have been assigned to design and conduct a cost efficient procedure for handling the CARBOSE separation and recovery. You will then test your procedure on a sample from the chemical spill site. You will be competing against six

other teams to see which team can efficiently recover the most CARBOSE from the sample. The winning team will be awarded a contract to clean up the remainder of the spill (this means job security and financial security for everyone on your team). Carbose Lab Students will work in teams of 4 to design and conduct an experiment to separate the mixture

and ultimately recover CARBOSE (salt) in the solid form. 1. Teams must submit a detailed procedure and a data table to the teacher before beginning the lab. 2. Teams will conduct their experiment. 3. Teams will compute the percent, by mass, of CARBOSE (salt) they recovered from the mixture and enter their

data in an Excel spreadsheet on the board. percent by mass calculation: Lab Group 1 2 3

4 5 6 7 % by mass of Carbose mass of salt

X mass of mixture 100 Warm Up

9/10, 9/11 Todays Objective: SWBAT use the differences in physical/chemical properties of substances in order to separate a mixture using laboratory techniques. 1. Give an example of a chemical change.

2. What are the four indicators of a chemical change? Quiz! Discussion - Carbose Lab

Students will work in teams of 4 to design and conduct an experiment to separate the mixture and ultimately recover CARBOSE (salt) in the solid form. 1. If you had time to run the investigation again, what would you do differently?

Separation Techniques In your groups, you will explore one laboratory technique. Share you findings with the class using the collaboration boards. - be short and concise - use vocabulary you are familiar with

- add a picture Warm Up 9/15, 9/16 Objective: SWBAT use dimensional analysis in order to convert between metric units. 1. Write the following in scientific notation/standard notation:

a. 0.0035 c. 1.29 x 10 -4 b. 12,390 d. 3.21 x 10 8

Separation Methods BCR You are given a mixture of salt, sand, water, and alcohol. Write a procedure to separate the mixture and collect its component parts. Be sure to include techniques and vocabulary that you have learned in class.

alcohol boiling point: 78-80C, water boiling point: 99-100C Quiz Review Metric System!

Convert 1000 milligrams to grams. Convert 250 mm to km. Convert 6.1 centiliters to hectoliters. Warm up 9/17 9/18

Objective: SWBAT identify significant figures in order to make accurate and precise measurements. Convert the following using dimensional analysis 1. 3.62 cm to km 2. 24 inches to km

Dimensional Analysis Review Significant Figures As a group, investigate what significant figures are. Why do we use significant figures? What are 4 rules you can make for determining

significant figures? Rules for Significant Figures Rule #1 All digits 1-9 are significant

459 How many digits are significant? 2.1 How many digits are significant?

.87992 How many digits are significant? Rule #2 Zeros in between 1-9 digits

are significant 104 How many digits are significant? 1.0402

How many digits are significant? 10.508 How many digits are significant?

100001 How many digits are significant? Rule #3 Trailing zeros are significant when there is a decimal

point 1.800 How many digits are significant? 8.060

How many digits are significant? 100 How many digits are significant?

100. How many digits are significant? 100.0 How many digits are significant?

Rule #4 Place holding zeros are NOT significant 0.0090

How many digits are significant? 0.0008700 How many digits are significant? 0.470 How many digits are significant?

End Clickers -Pass to the Center- Sig Fig Race

There are four rounds There are 8 people in each group Each person has a number card (numbers 1-8) Identify the number of sig figs in the problem

set for each round Use your number cards to organize yourself in the order of the answers for the round Example Round: Answers = 2,5,6,8,1,3,4,7 2 5

6 8 2

3 4 7 Warm Up

9/21 9/22 Objective: SWBAT make accurate and precise measurements and calculations by using the correct number of significant figures. Next Class: Open note quiz on dimensional analysis and sig figs

1. Convert 600,000 feet to kilometers 2. How many sig figs are in the following: a. 0.00250 c. 1005 b. 18000 d. 300.0

Todays Format: you will be moving from station to station at your own pace You must complete 3 problems correctly at each station before moving on

Station 1 Why do we need to be accurate and precise? Station 2 - How can we increase precision in the lab? Station 3 How do we use sig figs in our calculations? Station 4 How do we calculate our error in lab?

Station 5 Dimensional Analysis Review Station 6 Sig Fig Review Station 1 Accuracy vs. Precision

Accuracy Definition The closeness of a measurement to its actual value Station 1 - Why do we need to be accurate and precise?

Precision Definition The degree to which measurements show the same or similar results Reproducibility

Repeatability Station Station 11 - Why do we need to be accurate and precise? 1 What does the bulls-eye below

show? A. Accuracy B. Precision C. Both D. Neither Station

Station 11 - Why do we need to be accurate and precise? 2 What does the bulls-eye below show? A. Accuracy

B. Precision C. Both D. Neither Station Station 11 - Why do we need to be accurate and precise?

3 What does the bulls-eye below show? A. Accuracy B. Precision C. Both

D. Neither Station Station 11 - Why do we need to be accurate and precise? 4

What does the bulls-eye below show? A. Accuracy B. Precision C. Both D. Neither

Station Station 11 - Why do we need to be accurate and precise? 5 g/cm3 Which team was most precise

for the two trials? Team 1 Team 2 Team 3 Team 4 Team 5 Team 6 Trial 1 2.75

2.80 2.70 2.71 2.68

2.68 Trial 2 2.76

2.76 2.73 2.69 2.65

2.68 The density of aluminum is known to be 2.70 g/cm3 Station Station 11 - Why do we need to be accurate and precise?

6 g/cm3 Which team was most accurate for the two trials? Team 1 Team 2 Team 3 Team 4 Team 5 Team 6

Trial 1 2.75 2.80

2.70 2.71 2.68 2.68

Trial 2 2.76 2.76

2.73 2.69 2.65 2.68

The density of aluminum is known to be 2.70 g/cm3 Station Station 11 - Why do we need to be accurate and precise? Station 2:

How Can We Increase Precision in the Lab? Be honest when reporting a measurement, so that it does not appear to be more accurate than the equipment used to make the measurement allows. We can achieve this by controlling the

number of digits, or significant figures, used to report the measurement. Station 2 - How can we increase precision in the lab? Station Station 22 - How can we increase precision in the lab?

Station Station 22 - How can we increase precision in the lab? Station 3: Calculating with Significant Figures

Multiplication & Division Rule: The answer can contain no more significant figures than the least accurate measurement. Addition & Subtraction Rule:

The answer can contain no more decimal places than the least accurate measurement. Station 3 - How do we use sig figs in our calculations? Station 4: Percent Error Calculation Measured value accepted value x 100

accepted value Accepted True Actual Theoretical Station 4 - How do we calculate our error in lab?

Measured Observed Your Result Experimental Wrap Up

Station 1 Why do we need to be accurate and precise? Station 2 - How can we increase precision in the lab? Station 3 How do we use sig figs in our calculations? Station 4 How do we calculate our error in lab? Warm Up

9/24 9/25 Objective: SWBAT make accurate and precise measurements and calculations by using the correct number of significant figures. Homework: Aluminum foil lab procedure & data table

1. Convert 2.3 hL to mL 2. Round to the correct number of sig figs: a. 2.345 + 1.0 = b. 25.2 / 30 = Quiz!

Aluminum Foil Pre Lab PROCEDURE Using the information in the introduction, write a procedure to indirectly measure the thickness of aluminum foil. You will perform three trials for this experiment. Be specific and include proposed calculations.

Measurement Mania! You will have 1 minute at each station. Record all measurements and calculations using the correct number of significant figures. After 1 minute you will rotate.

Warm Up Objective: SWBAT develop a procedure to accurately measure the thickness of aluminum foil using common mathematical relationships. Reflect on the quiz from last class. -what were your successes on the quiz? -what concepts were challenging? (be specific!)

-what would you need to do to be more successful? Al Foil Lab Unit 1 - Study Guide Tentative test date: A: 10/6, B: 10/7

Warm Up Objective: SWBAT calculate density using water displacement in order to construct a mass vs. volume graph. 1. Which liquid is most dense?

2. What would the order of the layers be if the 2 liquids are put in a graduated cylinder from top to bottom? Density

Unit 1 Study Guide Tentative test date: A: 10/6, B: 10/7

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