unit 1 lectures s2015
TRANSCRIPT
Welcome to ChemistryWelcome to Chemistry
• Get a book, handouts & sit in seating chart (as you come in)
– Handouts include: safety contract, personal note (to return) see online for college credit
• While reading handouts I’ll check books out to you. -(ID CARDS)
• Log onto http://tinyurl.com/mrkicker– See dual credit and remind links.
• Log into Learn.kps (pass code on the board)– Click and fill out info sheet for Mr. K Then click on
read and complete the Rules and Protocol form
Online things
• Google Classroom– Block 1 Code u0kqiu – Block 2 Code goqo3i4
• Moodle (AKA Learn) Chemistry kuecker’s sections– Enrollment code: chem1 (block 1) chem 2 (block 2)
• Remind text: 81010 @khskick1• Classzone.com (see moodle)
Go to the website: www.remind.com/join/khskick2 (for
block two class) For Block three class, change the last part to
khskick3, etc. for the other blocks.
Then you can pick if you want to have text message alerts or email
alerts.
OR
Text to (402) 413-6491 message: @khskick1 or USE
@khskick2 (for block 2) etc.
Directions for SIGNING UP FOR REMIND
Online book
classzone.comHow to get to our Online Chemistry Book
This contains videos, animations, interactive tools and of course a
searchable book. Students can create their own accounts by going to
classzone.com and using the Activation Code.
Here it is: 5730772-200
1. Click on sign in
2. Create a student account
3. Type in birthday
4. Create a log in and password
5. Find our text book “world of chemistry”
6. Type in the activation code when requested.
Go to my website and look at Rules Protocol General information for chem or applied chem. Then do the forms on moodle.
Cellular phones, ear buds, any electronics, that are NOTintended for my classroom goals are NOT to be out and / or are to be silenced.
Tardy policy
TARDY POLICY: You must be in your be in your assigned seat
before the bell STARTS to ring. With your assignment and notebook
out ready to start. Consequences are:
1st tardy: warning –free
2nd tardy: 10 minute detention that same night or the next morning.
3rd tardy & subsequent: 20 minute detention & referral & school
policy beyond this.
Leaving the Room
• I don’t allow you to go anywhere.• IF I DO. . . • MUST TAKE A PASSES -bonus• Make up time for missing time.
• Nurse• Restroom - not frequent• Need a pink pass
Moodle
• How will we use this?• Blogging• Vocabulary• Videos• Practice test• Test with feedback!
Safety contract • Take home, get signatures and return it tomorrow! We’ll
discuss it tomorrow and take a safety test
Keys to success in Chemistry
• Get a 3 ring binder! (keep everything organized)• Pay attention to the skills we cover & review daily!• DO NOT MISS class. (Makeup work quickly)• READ YOUR TEXT!• Do more work than just the assigned
problems.
• STOP IN IF YOU DON’T GET IT!!!• Bring a sci. calculator & your book/chromebook daily• Always do your homework!!! (Plan on 30-45 min a night!)
• Show all your work at all times
• DO THE PDP’S AS I SUGGEST!
Keys to success in Chemistry
• Know our “clear learning goal” for the day.
Grading
• Check Powerschool frequently!• I go by total points. Everything is worth
point, tests have many more points. But don’t overlook the simple day to day things. Complete lab write ups and daily work as these are important too.
DUAL ENROLLMENT
• This class gives college credit for chem 145
• There is a handout on my website.
• PLEASE LET YOUR PARENTS KNOW!– This is for those going to a
college such as UNK,UNL, state colleges, etc. that are NOT majoring in a science area.
– THIS IS ONLINE ON MY PAGE
Lab partners & discussion partners
• Each unit, you’ll select a new partner. I’ll assign the first partners. My intent is that you work with many different students throughout the course of the class.
• EACH MUST DO THEIR OWN WORK!
Now
Log onto moodle
Fill in info sheet and rules protocol (next slide covers rules)
Get to know you activity
Time to start learning
Chemistry.Look at objectives and take notes on that page.
(on moodle)
ON TO CHEMISTRY LEARNING
Today’s Goal (outline)
• Vocabulary and Objectives (google –sharing)– handout
• Review the demos from yesterday (NOTES)• Safety & procedures in the lab.• Safety Test (on moodle)• Scavenger Hunt & Kahoot• Begin Lab – check out bunsen burners
What is chemistry and what do we do in this class??
• Routine: vocab, lecture, learning, Lab, Homework, tests• We learn something new every day! • Problem day problems
– Give them a sample
Show demos and list evidencesof a chemical change
(think of chemical and physical properties too)
Kool-Aid to water to milk
M&M & chlorate
Sugar & sulfuric
Nitric and penny
Mg & HCl
Nail & CuSO4
5 evidences of chemical change. • Release of energy: heat or light. Could be a gain of
energy too. (exothermic or endothermic)• Color change• Precipitate or solid being formed.• Gas• New odor• Is there an acronym we can make to remember these?
Definition of chemistry.
• The study of the structure, properties and composition of
substances and the changes that substances undergo
Why study chemistry?
• Chemistry is NOTa study of facts. It is an ongoing human activity.
• What things are you involved in, or see, that do NOT involve chemistry?
Chemists look at composition and
behavior of matter. They create
new products or make
existing products better
Types of Chemists (NOT ON ANY TEST)
• Organic chemistry • Inorganic chemistry• Analytical chemistry • Physical chemistry• Biochemistry
Various chemistry photos
Organic chemistry • Contain carbon
Inorganic chemistry
• Substances that don’t contain carbon
Analytical chemistry
• Composition of substances (minute quantities)
Physical chemistry
• Concerned with theories and experiments that describe behaviors of chemicals.
END OF DAY 1
• Vocabulary (sheet and online as well)
• Do online vocabulary quiz this week! Must do quizzlet first.
• Read page 1-8 and do pg 8 # 1-5
Now
Log onto moodle
Fill in info sheet and rules protocol (next slide covers rules)
Day 2 Goals• Observe and practice safety procedures• Complete a Safety test• Begin a Scavenger hunt• Begin our first lab: cut and bend glass• Collect handouts • –@start info sheet @ end safety contract.• Discuss pg 8 # 1-5 (walk by vocab)• Whiteboard quiz: Evidence of chem change.• Whiteboard quiz: What is chemistry?
BOOK PROBLEMS Ch 1 (posted on tinyurl.com/mrkicker)
• Assign book questions part 1 (due in two days)
• Read ch1 pg 3-8 & 12 (quantitative and qualitative) do pg 19-20: 4 &11
• Read ch 2 ALL
• Do pg 30: 1, 3 See ex 2.1 pg 31 do pg 31: pp 2.1, pg 34: pp 2.2 & 1-5
Assignment
Assignment
• Do online vocabulary quiz this week! Must do quizzlet first & mark the completed box.
• See my www.tinyurl.com/mrkicker page for assignment listings.
SafetySafetyTake some time
to read the KHS safety
contract & then see some key points on this
handout.
Goggles - prefer no contactsread & listen carefullyNo food or gum in lab
Safety showerSafety shower
Use if large amount of acid or base or strong chemical is spilled on you or your clothing.
(see the chem jeans!)
eyewash stationeyewash station
chemicals in your eyes
The use of contacts is not recommended in lab.
Fume hoodFume hood
use when a gas, especially colored gas, could be given off.
Show how do turn them on & off.
Handling chemicalsHandling chemicalsuse spoonsdon’t eat or taste stuffShow how to get stuff & how to mass things.
SmellingUse wafting technique
Mixing ChemicalsMixing Chemicalsdo as instructedUse small amountNever put back into original container.
clamps picturesclamps pictures
Gas Outlets & BurnersGas Outlets & Burners
Check your equipment.Wear goggles with flames.Light the match first.
Gas Outlets - BurnersGas Outlets - BurnersTurn on the gas at the valve and then at the burner.
If the flame goes out turn off the gas immediately.
test tubes picturestest tubes pictures
Broken glass causesBroken glass causes
heatdroppedNever heat cracked glassware.Put broken glass in sharps
container
first aid (FORM TO FILL IN)first aid (FORM TO FILL IN)
remain calmreport all accidents immediately
no matter how small
firesfires
use the blanket for peopleuse extinguisher for
materials etc. PAS (pull, aim, squeeze)
if there is a fire…
lab cleanuplab cleanupspillsliquids - sandpowders - sweep up and
dispose.Crock for solid waste.Matches go in the trash! *
In summaryIn summary
follow classroom rules.
In summaryIn summary
If in doubt, ask.
In summaryIn summary
Read & Listen carefully
In summaryIn summaryIn summaryIn summaryYou’re here to be curious, experiment, and discover.
In summaryIn summaryYou’re not here to do stupid stuff! So use your common sense!
See lab safety video spoof
Read general info
Read general info lab safety recap
Read our KHS safety contract, sign and return
• Next is a safety quiz prior to preparing for our first lab.
Safety test
• Do this on moodle (AKA Learn.kps, (password on board)
• then use your scavenger hunt to locate some of the materials. Begin to memorize their names.
Working in Chem LAB• Show how electronic balance is zeroed • Show how to read grad and thermometer• Check out students on Burners & do glass cutting &
bending & Pre lab for the next day.– After you are done, clean up & start book problems
Day 3
BOOK PROBLEMS Ch 1 (posted on tinyurl.com/mrkicker)
• pg 19-20: 4 &11
• pg 30: 1, 3 See ex 2.1 pg 31 do pg 31: pp 2.1, pg 34: pp 2.2 & 1-5
Any Questions? (due tomorrow)
Working in Chem LAB• ORAL INSTRUCTIONS• Show how electronic balance is zeroed • Show how to read grad and thermometer• Demo limewater
• Demo H2O2 H2 + O2
• Complete lab carefully. Should take about 30 minutes• You will turn it in and we will discuss some things.
Working in Chem LAB• Materials
– Straw – demo by kicker
– 2 weigh boats (Mg & MgCO3)
– Thermometer– Lg TT (test tube) for Rxn -acid goes in here– Sm TT for limewater test– Sm TT to collect gas– Wooden splint to test gas
• Limewater will already be filtered, or almost clear* Otherwise Filter it!
After Lab (Kahoot time)
• Done early: Bee Blog
• Also: I made a scavenger hunt for Kahoo.• Chem Equipment Scavenger Hunt
• Students log in at https://play.kahoot.it
• I log in at https://create.kahoot.it
Day 4
Goals
• Discuss & turn in what you learned from lab pg 9-10• Discuss book questions from Ch 1 & turn in • Complete some notes on properties & changes• Observe a demonstration on changes 11-13 • Complete a small lab on change pg 14-15
Law of Conservation of Mass
• Mass can not be created or destroyed in ordinary (not nuclear) chemical reactions or physical change
• All the mass can be accounted for.– Burning of wood results in products that
appear to have less mass as ash; where is the rest?
In a chemcial reaction
• products have NEW PROPERTIES because the ratio and arrangement of atoms is different!
• We draw an arrow from reactants to products
R P
• The exothermic reaction when Magnesium metal burns can be shown by this reaction: Mg + O2 MgO + Heat
Reactant• A starting substance in a chemical reaction.
H2
0 --> H2
+ O2
H2
SO4
+ NaOH --> Na2SO
4 + H
20
Product• A substance that is formed in a chemcial reaction.
H20 --> H2 + O2
H2SO
4 + NaOH --> Na
2SO
4 + H
20
electricity
Reaction• A process in which chemicals
undergo a chemical change. We can write equations for these.
• (later we use that equation to determine a lot of information)
• They now have different physical AND chemical properties
Demo
• H2O2 H2O + O2
• Define element, compound & Discuss Subscripts & diatomic elements. (HONClBrIF’s)– 1 atom type Vs More than one atom– DRAW PICTURES (DOT DIAGRAMS)
• Mg + HCl --> H2 + MgCl2
• MgCO3 + HCl --> MgCl2 + H20 + CO2
Law of Constant proportion• When elements form compounds they do so in simple
whole # ratios. Hence formulas.
Zn +HCl ZnCl2 + H2
• Later we will talk about balancing reactions.
POST LAB Let’s see the reactions for the lab.
• Teach reactant and product & (aq) (s) (g)
• Mg + HCl --> H2 + MgCl2• MgCO3 + HCl --> MgCl2 + H20 + CO2
• CO2 + CaO --> CaCO3(the cloudy stuff in the limewater) SHOW ON PT
• Have a few students put these on the whiteboard and put in the labels (aq) (s) (g)
• Discuss exothermic & endothermic, put Heat in the equation as a product.
• Draw with dot type diagrams.
Identify three common lab gases.
• CO2 Hydrogen (H2) & Oxygen (O2)
• Which is flammable?• Which supports combustion?• Which extinguishes flames?• Know limewater test.
Sample quiz
• PbNO3 + KI --> PbI + KNO3
• KNO3 + Li --> K + LiNO3
Endothermic reactionsReactions that absorb heat to progress. It feels cold
Ex: a physical change of melting an ice cube
This has a positive gain in energy (need energy to make it go.)
R + E -> P
Exothermic reacions
• Energy is released from the reaction.• It feels hot
This has a negative gain in energy (it gives us energy)
R -> P + E
Physical property• A property that can be observed without changing
the chemical composition of the material
• Words that describe matter (adjectives)• Examples: color, shape, malleability, hardness, m.p., b.p.
etc.
Chemical property• The ability to undergo chemical reaction. A property that
relates to the chemical change that something could undergo.
• It can only be observed by changing the composition of the material.
• Ex: it could fade in sunlight, will decomposes in acid. . . Etc.
Physical change• An alteration of a substance that does not affect its
chemical composition.
• A change in appearances or form, without changing the composition.
• Ex. Melting, evaporation, sublimation, boil, melt, cut, bend, split, crack
• Boiled water is still water etc.
Chemical change
• a change where a new form of matter is formed and chemical bonds are made or broken. (see 5 evidences)
• The ratio of atoms is changed to something else & atoms are rearranged.
• Ex. Rust, burn, decompose, ferment
What is a
• physical property of Paper, of Mg?
• Chemical property of paper, of Mg?
Changes Demo pg 11-13Followed by a mini- Labpg 15 & 16
• A Video is online as well
• Complete lab pg 15-16
• Homework: page 14 “which are which” & book probs.(next pg)
•
Book questions Set 2
Book problems Part 2: read pg 35-Pg. 40 #2.3, pg 43 1- 6 pg 45-46 3, 4, 5, 8-14, 16-18, 23-29. Pg 47 1-10(due in two days)
Day 5
Vocabulary and Change Demo/Lab
• Notes in packet.
VOCAB IS BELOW
• I’ll go pretty quickly, I expect that you will listen and then look at your book to fill them in. ( or go online) You MUST have a working knowledge of these terms!!! And sometimes the vocab sheets will be graded.
• Handout periodic tables. Put your name on these. Put kicker’s class on them also.
Matter• Anything that has mass and takes up space
Atom• Simplest form of matter that can not be chemically
decomposed.• See bottom of pg 24, especially the term particulate.
Element• A substance that cannot be changed into simpler
substances under normal laboratory conditions
• Only 1 type of atom
• Where do you look for a list of these?
Metals • One class of elements that includes the majority of the known
elements. Some properties: Luster or shine, malleable, ductile, good conductors of electricity and heat.
Nonmetals• Elements that are grouped on the right side of the
periodic table and have the following properties:• Dull looking, brittle, poor conductors heat and
electricity
Metalloid• These are the elements that are
found between the metals and non metals on the periodic table. They have some properties of both. – For instance they could be shiny
and brittle and conduct electricity well, but not heat.
Differentiate between• Metal (properties & location)
– Luster, malleable, ductile, conductors of heat & electricity
• Nonmetal (properties & location)– Dull, brittle, non conductors
• Metalloid (properties & location)– Some properties of both
SEE OUR P.T.
Molecule• A molecule is a chemical compound made up of
nonmetals.
Compound• A substance that can be separate into simpler
substances (element or other compounds) only by chemical reactions. Note: Compound have formulas
Mixture• A physical blend of two or more substances. Not
chemically combined.– Heterogeneous & homogenous
Solution• A homogeneous mixture
Composite• A mixture that is used for constructing things. Usually it is
layered and heterogeneous
Day 5
Go over quiz
KAHOOT
Another one is online, we’ll do that at the end of the class (password TBA)
Matter cart & classification of matter PPT
•WS classification and image ws
Today
Classify matterToday
DEMO Show & Tell• I have a cart with elements, compound, solutions
(homogenous mix.) & mixtures. Also some: metals, non metals, & metalloid.
• Ask what is the easiest to distinguish?• Do you know enough to classify?• (go thru these notes, then return to this cart of items)
Element
If: M, N, S
Compound Mixture
If: Homo or Hetero
Solution? Substance
Y or N
What is Matter?
• Matter is anything that takes up space and has mass.
• Mass- amount of material or “stuff” in an object
• Weight is due to gravity, and changes from location to location; mass is always constant.
Classification (sub classification)
• Element (metal, nonmetal, metalloid)• Compound (has formula. . . Constant proportion of
elements)• Mixture * (heterogeneous or homogeneous)
• *special mixtures for construction are called composites
Types of Matter• Substance- a particular kind of matter
- pure; is uniform (all the same) and has a definite composition (examples are elements & compounds)
• Mixture- more than one kind of matter; has a variable composition
States or Phases of matter• Solid- matter that can not flow (definite
shape) and has definite volume.• Liquid- definite volume but takes the
shape of its container (flows).• Gas- a substance without definite
volume or shape and can flow.• Vapor- a substance that is currently a
gas, but normally is a liquid or solid at room temperature. (water vapor?)
States of MatterStates of Matter
Solid
Liquid
Gas
Definite Volume?
YES
YES
NO
Definite
Shape?
YES
NO
NO
Temp.
increase
Small Expans.
Small Expans.
Large Expans.
Com-pressible?
NO
NO
YES
Solid Liquid Gas
Melt Evaporate
CondenseFreeze
Mixtures• Physical blend of at least two substances; variable
composition• Heterogeneous- mixture is not uniform in composition• Chocolate chip cookie, gravel, soil.• Homogeneous- same composition throughout; called
“solutions”• Kool-aid, air, salt water• Every part keeps its own properties. These look
uniform, but are NOT always put together in the same ratios.
• Alloys are solutions.
Solutions
• Homogeneous mixture– We haven’t changed the individual components.
• Mixed molecule by molecule• Can occur between any state of
matter– gas in gas; liquid in gas; gas in liquid;
solid in liquid; solid in solid (alloys), etc.
Solutions
• Like all mixtures, they keep the properties of the components.
• Some can be separated easily by physical means: rocks and marbles, iron filings and sulfur
Phases A “system” with uniform composition and
properties are a phase. Pure substances have one phase, homogeneous mixture have a single phase. A heterogeneous mixture has 2 or more phases. Think of ice cream sundaes.
Phases are “Parts you can see”
Substances• Elements- simplest kind of matter• cannot be broken down any simpler• all one kind of atom.• Compounds are substances that can
be broken down only by chemical methods
• When broken down, the pieces have completely different properties than the original compound. They HAVE FORMULAS
Compound or Mixture –How do we tell?
Compound Mixture
Made of one kind
of material
Made of more than
one kind of material
Made by a
chemical change
Made by a
physical change
Definite
composition
Variable
composition
(can have varying strengths)
MATTER CHART (OVERHEAD)
Another look at a flowchart
• So where are alloys?
• Composites?• plastics?
Which is it?
Which is it?
Which is it?
Constant composition lab
3 mixtures of salt water. Find ratio of dry salt to that water that left.
Assignment & Activity
• Classification practice around the room & WS
.
• Journal online: Find a helpful website, video or image, share it with the class and reflect, comment, on someone else’s.
• Review!!! Study…. Use Learn.kps & the practice quizzes.
Day 6
Day 7
constant composition
•CFA
Today
REVIEW• Collect book probs and we go over CFAs• Physical chemical thinking WS• Ch review WS• Create the first set of PDPs
• Online practice - ipads
Bee Blog information.
• http://bigstory.ap.org/article/honeybees-trained-croatia-find-land-mines
• Animals in military• http://www.mnn.com/e
arth-matters/animals/photos/10-ways-animals-have-served-the-military/in-the-army-now