Chem II-Period: 8.7.14 Due: Syllabus and Lab Safety Contract Signed Objectives: Student/Teacher Bio...

Chem II-Period: 8.7.14Due:

•Syllabus and Lab Safety Contract Signed

Objectives:

•Student/Teacher Bio

•Review Syllabus and Safety Lab Procedures

•Collect/Check-Off Lab Equipment at Benches

Homework:

•Review Lab Safety Rules-test tomorrow

•Review Ion Nomenclature

Chem II: Student’s Bio

1. What was your last science and math course and what grades did you earn?

2. When did you take Chem I? Who was your instructor?

3. What is your strongest subject? Weakest subject?

4. Do you have access to a computer at home?

5. What are your hobbies and interests?

6. Do you have an afterschool job? If so, where?

7. What kind of career are you interested in pursuing?

Ms. Leeper’s Bio

txstate.edu

bio-technologies.info

cardiff.ac.uk

bsmommy.wordpress.com

internetapplicants.pb

works.com

Chem II-Period: 8.8.14Due: •Syllabus and Lab Safety Contract Signed

Objectives:•Lab Safety Quiz•Science Reflection Article•Scientific Measurement Practice Problems

Homework:•Annotate Science Reflection Article •Work on Scientific Measurement Practice Packet

Professions Dependent Upon ChemistryPediatrician Military

Dentist/Dental Hygenist Archaeologist(Historian)

Pharmacist Biologist

Nurse Historian

Speech Therapist Gynecologist

Teacher

Engineer(Chemical)

Chemist(Nuclear)

Business Manager

Child Psychologist

Cosmetology

Physical Therapist(Sports Medicine)

Computer Science

Lab Safety Rules

• Address any questions about the rules.

(Safety Lab Packet B-C).

Ebola Therapy Article

• Annotate article and write down questions that you have as you read the article.

• Due Monday (8.11)

Scientific Measurement Review

• Review scientific measurement concepts by completing packet.

• Scientific Measurement ppts. on my webpage if needed.

• Due Tuesday(8.12)

Pre-Lab Questions

Significant Figures in Measurements1. All nonzero numbers are significant.

Ex. 234 g = 3 significant figures (sig. figs)

1. Zeros in between nonzero numbers are significant. Ex. 2,034 g = 4 sig. figs.

3. Leading zeros are NOT significant. Only serve as placeholders. Ex. 0.0234 = 3 sig. figs

4. Trailing zeros are significant IF they have a decimal point in the measurement.

Ex. 0.02340g = 4 sig. figs.

Calculating Measurements• When calculating with measurements your answer to

such calculations can only be as good as your weakest measurement.

1. Multiplying and Dividing:The # of sig. figs. in the answer is the same as the

measurement with the least number of significant figures.

2.2 g x 0.430 g = 0.95 g(2sig. Figs) (3 sig. figs.) answer: 2 sig figs.2. Addition and Subtraction:The # of decimal places in the answer is the same as the

measurement with the least number of decimal places. 3.20 g + 0.286 g = 3.49g (2 decimal (3 decimal (answer: 2 decimal places) places) places

*.

Accuracy vs. PrecisionPrecise Results:

•When experimental results from different trials are close to one another.

•Accurate Results:

When the experimental results’ average is close to the actual value.

http://www.mhhe.com

Metric Conversions

Common Measurement Conversions

1 yard = 36 in 1ft = 12in

454 g = 1 lb. 1 L = 1dm3

2.54cm = 1 in. 1 mL = 1cm3

2,000 lbs. = 1 t 1 m = 1.09 yd

60 s = 1 min 1 km = 0.62 mi

60 min = 1 hr 1 mi = 5280 ft

1L = 1.06 qts 1760yd = 1mi.

4qts = 1 gal K = oC+ 273

1mol = 22.4L oC = 5/9(oF - 32)

16oz. = 1lb. 1.38 acres= 60,000 ft2

Chem II-Period: 8.11.14Infinite Campus Update:•Lab Safety Exam (34pts.)

Due: • Syllabus and Lab Safety Contract Signed from a few.•Ebola Therapy annotation/qts. •Prepared for Density Lab

Reminders:•Scientific Measurement Packet-due Wed.•Ebola Therapy annotation/review qts.-due Fri.

Objectives:•Density Lab pre-lab qts./procedures•Scientific Measurement Review

A safe and productive classroom looks like….


Density Lab Pre-Lab Qts.

Reminders:•Scientific Measurement Packet-Due Wed.•Ebola Therapy annotation/review qts.-Due Fri.

Objectives:•Scientific Measurement Review (distribute resources)•Density Lab

Homework:

Scientific Measurement Review Packet

Density Lab: Pre-Lab Qts.

Density Lab• Purpose: To review scientific measurement

concepts.

• Complete pre-lab questions and develop procedures prior to starting lab.

• While performing experiment, document all data(qualitative and quantitative).

• Goggles must be worn at all times.

• Complete post-lab questions.

• Classroom Analysis of data.

• Each student will turn in a lab report.


Scientific Measurement Packet

Reminders:•Ebola Therapy annotation/review qts.-due Monday

Objectives:•Scientific Measurement Review•Density Lab Procedures/Experiment

Homework:


• Quiz on Monday


concepts.




• Complete post-lab questions.

• Classroom Analysis of data.

• Each student will turn in a lab report.


Scientific Measurement Packet

Reminders:•Ebola Therapy annotation/review qts.-due Monday

Objectives:•Scientific Measurement Review•Density Lab Experiment

Homework:•Graph Group’s Data: Density vs. Concentration


concepts.




Chem II-Period: 8.15.14Infinite Campus Update:

Scientific Measurement Review Pkt.(14)

Objectives:•Scientific Measurement Review•Density Lab Experiment and Analysis

Homework:•Complete group’s data/analysis sections-due Mon.•Annotation/review qts.-due Monday•Review scientific measurement concepts-Quiz Tues.

Density Lab: Data/Analysis

• Known % concentration soln.: (0,5,10,15,20,25)• Careful not to cross-contaminate solutions.• Take/record accurate measurements for vol/mass.• Express density values to the correct degree of

accuracy.

Chem II-Period: 8.18.14Due:•Density Lab: group’s data and analysis sections•Ebola Article and Review Qts.

Objectives:•Discussion of Ebola Article•Density Lab: Analyze class’s data

Homework:•Scientific Measurement Quiz•Class’s data and analysis sections

Ebola Therapy Discussions• Group Discussion Qts. :

*Pair up with two other people and discuss qts. each of you came up with while annotating. Record three qts. your group thinks would be valuable to share with the class. Include answer or research answer via phone.

Lab Report Format• Purpose:

What was the point of the lab?• Materials:

What did you use to complete lab?• Procedures:

What steps did you take to complete the lab?• Data:

Qualitative and quantitative data from lab group and classroom. Quantitative data needs to be organized in charts/tables/graphs.

• Analysis/Conclusion:

Analysis of data by answering post-lab questions using complete sentences organized into a few paragraphs.

Chem II-Period: 8.19.14Due:•Density Lab: group’s data and analysis sections

Objectives:•Scientific Measurement Quiz•Density Lab: Complete lab and analyze data

Homework:•Density Lab: Complete data/analysis sections

Chem II-Period: 8.20.14Due:•Density Lab: group’s data and analysis sections

Objectives:•Density Lab: Analyze Data (Group/Class)•Composition of Matter Graphic Organizer

Homework:•Density Lab Report-Due Friday•Composition of Matter Graphic Organizer-Due Thurs.

Graphing Calculator: Analysis

• Follow instructions for retrieving analysis from calculator

• Linear regression equation: y=ax+b

(slope equation)

a= 0.007371

b= 0.9662

r2= 0.6854

r= 0.8279

Density Lab: Class’s Data O% Density

5%Density

10%Density

15%Density

20% Density

25% Density

Unkwn 1Density

Unkwn2Density

Grp 1

Grp 2

Grp 3

Grp 4

Grp 5

Grp 6

Grp 7

Grp 8

Avg.

Class’s Data Analysis Qts.:1.Are the class’s density values precise? Explain your answer.2.Calculate the class’s average density values and plot on graph with concentration.3.According to the class’s average data, what is the % concentration of eachUnknown?4. Is the class’s data accurate? Explain by calculating % error of concentration for each unknown. Is the class’s % error better than your group’s % error? Explain.




(slope equation)

a= 0.007371

b= 0.9662

r2= 0.6854

r= 0.8279

Classification of Matter: Graphic Organizer• Matter Intramolecular Forces• Substances Energy(Endo/Exo processes)• Mixtures Solutions• Elements Colloids • Compounds Suspensions• Homogenous Mixtures• Heterogenous Mixtures• Subatomic particles (protons, neutrons, electrons)

• Chemical Changes• Physical Changes• Intermolecular Forces

Chem II-Period: 8.21.14Infinite Campus Update:•Scientific Measurement Review Quiz(14pts.)•Ebola Therapy Article (15pts.)

Due:•Classification of Matter Graphic Organizer

Objectives:•Density Lab: Analyze Data (Group/Class)•Classification of Matter Graphic Organizer

Homework:•Density Lab Report-Due Friday

Classification of MatterGraphic Organizer

Scientific Measurement Review Quiz

Chem II-Period: 8.22.14

Objectives:•Density Lab: Actual concentration values of unknown!•Classification of Matter Graphic Organizer•Classification of Mixtures

Homework:•Density Lab Report-Due Monday

Density Lab Report Format

• Heading for each section of lab report.

• Data section should include table/hand-graph/slope equation from calculator for group AND class’s data.

• Analysis: In paragraph form, ALL post lab questions should be addressed. You determine the organization of answers for this section.

Density Lab: Class’s Data O% Density

5%Density

10%Density

15%Density

20% Density

25% Density

Unkwn 1Density

Unkwn2Density

Grp 1

Grp 2

Grp 3

Grp 4

Grp 5

Grp 6

Grp 7

Grp 8

Avg.

Class’s Data Analysis Qts.:1.Are the class’s density values precise? Explain your answer.2.Calculate the class’s average density values and plot on graph with concentration.3.According to the class’s average data, what is the % concentration of eachUnknown?4. Is the class’s data accurate? Explain by calculating % error of concentration for each unknown. Is the class’s % error better than your group’s % error? Explain.




(slope equation)

a= 0.007371

b= 0.9662

r2= 0.6854

r= 0.8279

Chem II-Period: 8.25.14Due: •Density Lab Report

Objectives:•Tweak Classification of Matter Graphic Organizer•Classification of Mixtures Lab

Homework:•Classification of Mixture Lab-I.D. with asterisk which mixtures were challenging to classify. •Distinguish between Molarity and Molality

Classification of Matter: Graphic Organizer• Matter Intramolecular Forces• Substances Energy(Endo/Exo processes)• Mixtures Solutions• Elements Colloids • Compounds Suspensions• Homogenous Mixtures• Heterogenous Mixtures• Subatomic particles (protons, neutrons, electrons)

• Chemical Changes• Physical Changes• Intermolecular Forces

Classification of Mixtures: Graphic Organizer

Chem II-Period: 8.26.14Due: •Density Lab Report-LATE

Objectives:•Classification of Mixtures Lab•Distinguish between Molarity vs. Molality

Classifying Mixtures

Pre-Lab qts.:

1.Distinguish between solutions, colloids, and suspensions and give an example of each.

2.What separation technique would you use to separate substances from each type of mixture?

Classification of Mixtures Lab• Classify the mixtures as either a solution,

colloid, or suspension.

• After classifying them, highlight samples that were challenging to classify. Which classes of mixtures are represented in these selected samples?

• What test would scientists use to distinguish between these two classes of mixtures. How does it work?

Classifying Mixtures

Chem II-Period: 8.27.14Due: •Mixture Lab Questions•Distinguish b/w Molarity vs. Molality

Objectives:•Complete classification of mixtures lab. •Distinguish between Molarity and Molality of solutions.

Homework:•Molarity vs. Molality practice problems-due Thurs.•Establish procedures for Molarity vs Molality lab.

Classification of Mixtures Lab• Classify the mixtures as either a solution,

colloid, or suspension.

• After classifying them, highlight samples that were challenging to classify. Which classes of mixtures are represented in these selected samples?

• What test would scientists use to distinguish between these two classes of mixtures. How does it work?

Molarity vs. Molality of Solutions

Chem II-Period: 8.28.14Due: •Molarity vs. Molality word problems

Objectives:•Distinguish between Molarity and Molality of solutions.

(word problems/lab)

Homework:•Establish procedures for Molarity vs Molality lab. •Scientific Review-molarity vs. molality problems

Concentration of Solutions Molarity vs. Molality Problems

Molarity vs. Molality Lab

• Complete word problems.

• Establish procedures for lab.

Chem II-Period: 8.29.14Due: •Molarity vs. Molality Problems

Infinite Campus Update: •Classification of Mixture Lab (10pts.)


(Molarity vs. Molality Lab)

Homework:•Complete post-lab qts. From lab. •Scientific Review-complete problems we have addressed.

Chem II-Period: 9.2.14Due: •Molarity vs. Molality Problems


(Molarity vs. Molality Lab)•Distinguishing between ionic and covalent compounds

Homework:•Complete post-lab qts. From lab. •Scientific Review-complete problems we have addressed. •Venn Diagram for ionic and covalent compound

Molarity vs. Molality Lab

Chem II-Period: 9.3.14Due: •Molarity vs. Molality Lab •Venn diagram for ionic and covalent compounds.

Objectives:•Distinguish between concentration of solutions.

(Molarity vs. Molality)•Distinguish between dissolving and dissociation of solutes in a solution. •Classify compounds as either ionic, covalent, acidic, or basic.

*Quiz tomorrow over mixtures including Molarity and Molality.

Molarity vs. Molality Problems

Solutions: Electrical Conduction• Predict which solutions will conduct

electricity. Explain how you know this.

a.sugar solution (C12H22O11+ H2O)

b.Salt solution (NaCl + H2O)

c.Vinegar (HC2H3O2 + H2O)

Solutions: Electrical Conduction• Predict which solutions will conduct

electricity. Explain how you know this.

a.sugar solution (C12H22O11+ H2O)

b.Salt solution (NaCl + H2O) metal ion

c.Vinegar (HC2H3O2 + H2O) H+ ion

• Illustrate why some solutions conduct electricity and why others’ do not?

Solutions: Electrical Conductions• Website that illustrates electrical conduction in

solutions.

• https://phet.colorado.edu/simulations/sims.php

Chem II-Period: 9.4.14Due: •Distinguish between dissolving and dissociation of solutes in a solvent.

Objectives:•Mixtures and Concentration of Solution Quiz •Distinguish between dissolving and dissociation of solutes in a solution.•Factors that affect the solubility rate of solutes in a solution.

Homework:•Complete Scientific Skills and Matter Review-Test Mon.

Salt Solution Sugar Solution

Na+

Na+

Na+

Na+

Na+

Cl-

Cl-

Cl-

Cl-

C11

H12

O11

C11

H12

O11

C11

H12

O11

C11

H12

O11

Dissolving vs. DissociationWhat is the difference between dissolving and dissociation?

Solutions: Dissolving • A solute is soluble in a solvent.

• Three degrees of solubility:

*unsaturated solutions

*saturated solutions

*supersaturated solutions

C11

H12

O11

C11

H12

O11

C11

H12

O11

C11

H12

O11

SUGAR SOLUTION

Salt Water

Na+

Na+

Na+

Na+

Na+

Cl-

Cl-

Cl-

Cl-

Solutions: Dissociation• A solute breaks up into ions when soluble (dissolves) in a solvent.

Salt Water Sugar Water

Na+

Na+

Na+

Na+

Na+

Cl-

Cl-

Cl-

Cl-

C11

H12

O11

C11

H12

O11

C11

H12

O11

C11

H12

O11

Dissolving vs. Dissociation

DISSOLVES AND DISSOCIATESDISSOLVES AND DISSOCIATES DISSOLVES ONLYDISSOLVES ONLY

Conclusion: Which class of compounds will dissociate when dissolved in a solvent?

7.2

• When solutes dissociate in water they are able to conduct

electricity.

• These solutes are ionic compounds or acids/bases.

• These solutes are also called electrolytes.

Acids and Bases

academic.cuesta.edu

Acids and Bases

http://wikis.lawrence.edu/display/CHEM/Acids+and+Bases-Davis

(HCl)

(NaOH)

dissociation

dissociation

Acids and Bases

http://www.chem4kids.com/files/react_acidbase.html

• Acids and bases dissociate in water.

• Strong acids/bases dissociate best in H2O.

(strong electrolytes)

• Weak acids and bases dissociate poorly in H2O (weak electrolytes)

Cl Cl

Cl

Cl

NaNa

Na

Na

Factors that affect Solubility

• What factors do you think affect the rate at which a solute dissolves in a solvent?

Scientific Skills and Matter Gallery Walk

Chem II-Period: 8.7.14 Due: Syllabus and Lab Safety Contract Signed Objectives: Student/Teacher Bio...

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