chemistry i: 8/12/13 objectives: turn lab safety illustration in tray. bell ringer: classroom...

Chemistry I: 8/12/13 Objectives:

•Turn lab safety illustration in tray.

•Bell Ringer: Classroom Rules/Discipline

•Address Lab Safety Rules.

Homework:

•Look over lab safety rules.

•Complete lab safety scenarios.

•Lab Safety Test tomorrow.

Chemistry I: Bell Ringer1. What are Ms. Leeper’s classroom rules?

2. If you disrupt class what are Ms. Leeper’s disciplinary actions?

3. a. What does S.W.A.M.P stand for?

b. Give an example of how you can implement each letter in Ms. Leeper’s class daily.

*When completed place in appropriate tray.*

Classroom Rules1. Students must be in class when the bell rings.

2. Bring all materials to class with you.

3. Students must raise hand before talking or getting up out of seat.

4. Assignments must be placed in tray when requested for full credit.

5. A hall pass must be used to leave class.

6. Food, drinks, and bottled water must be disposed of properly before leaving class.

7. Electronic devices are only permitted for specific assignments.

8. Academic dishonesty will NOT be tolerated.

9. Students must follow lab procedures at all times.

Disciplinary ActionsWhat are the consequences of violating Ms. Leeper’s

rules?

First Offense: Vebal warning

Second Offense: classroom referral, afternoon detention, and parent notification

Third Offense: Office referral and parent meeting.

Exception to step-by step consequences:

Academic dishonesty

Gum on furniture/equipment

Extremely harmful disrespect and disregard to instructors/peers.

Chemistry I : Lab Safety Rules • Discuss lab safety rules.

• Watch lab safety video clip.

• Complete lab safety scenarios.

• Lab Safety Test tomorrow.

Chemistry I: 8/13/13

Objectives:

• Turn in Safety Lab Illustration (deduction)

• Address Lab Safety Packet

• Watch Lab Safety Video

• Take Lab Safety Test

• Introduce Graduate Cylinder Lab

Homework: Read Graduated Cylinder Lab

Chemistry: 8/14/13

Objectives:

• Measure, graph, and analyze data from graduated cylinder lab.

Homework:

Graph data from lab.

Chemistry I: 8/15/16

Objectives:

•Analyze data from graph.

•Address density

•Distinguish between accuracy and precision.

Homework:

Scientific Skills worksheet qts. 1

Interpreting Graphs: Slope

Slope= rise/ run

(y2-y1)/(x2-x1)

Chem I: 8/16/13Objectives:

• Assess graphing techniques from homework

• Distinguish between accuracy and precision.

• Identify and apply significant figures in data analysis.

Homework:

• Scientific Skills Worksheets

(qts. 2-4 on front pg, front of second pg. )

Experimental Variables• Independent variable

- variable “I” control in the experiment.

- Always plot on x-axis

• Dependent Variable

- variable depends on the independent variable

- Always plot on y-axis

Scientific Skills GraphWith data from qts. from scientific skills packet, we need to use quadrant IV’s set-up on our graph.

math.about.com

Scientific Skills Graph

Types of Experimental Results

Qualitative Results: (quality)

Quantitative Results:(quantity)

Types of Experimental Results

Qualitative Results: (quality)• What we observe thru our senses.

What we see, smell, hear, or sometimes even taste.

Subjective data, questionable data.

Quantitative Results:(quantity)

Data involving numbers

Usually measurements

Definitive data, cannot argue with and so is the most important type of data collected by a scientist.

Analyzing Quantitative Data• Precision :

• Accuracy:

Accuracy vs. Precision

• Accurate Results:

When you compare your results with a true value.

• Precise Results:

• When you compare your experimental results with one another.

Significant FiguresSignificant Figures: • Definite numbers plus the first estimated number

in the measurement.• The numbers must be directly related to the

object’s measurement, not serve as placeholders. • Importance of significant figures?

Determines the degree of accuracy for a measurement.

Significant Figures in Measurements1. All nonzero numbers are significant.

2. Zeros in between nonzero numbers are significant.

3. Leading zeros are NOT significant. Only serve as placeholders.

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

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.

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.

Chem I : 8/19/13Objectives: • Turn in graph from qts.one only.• I can express measurements in scientific notation. • I can determine the number of significant figures

in a measurement. • I can calculate using significant figures.

Homework: • Check Infinite Campus-updated grades.• Complete Scientific Skills packet

ICP : 8/19/13Objectives: • Turn in graph from qts.one only.• I can express measurements in scientific notation. • I can determine the number of significant figures

in a measurement. • I can calculate using significant figures.

Homework: • Check Infinite Campus-updated grades• Complete Scientific Skills packet.

Scientific Measurement: Bell Ringer1. What would be an example of a qualitative and

quantitative observation from the experiment in qts. one.

2. What is the density of carbon with a mass of

56.7 grams and a volume of 25.0 cm3

3. How many significant figures are in each measurement below:

a. 0.0050 g. b.3,020g c. 8.060g d. 1.00x104 g

4. Express the following measurements in scientific notation.

a. 300,000,000m/s (speed of light)

b. 0.000000001m (equal to one nanometer)

Scientific Measurement: Bell Ringer1. What would be an example of a qualitative and

quantitative observation from the experiment in qts. one.

2. What is the density of carbon with a mass of

56.7 grams and a volume of 25.0 cm3

3. How many significant figures are in each measurement below:

a. 0.0050 g. b.3,020g c. 8.060g d. 1.00x104 g

Scientific Measurement: Bell Ringer

4. Express the following measurements in scientific notation.

a. 300,000,000m/s (speed of light)

a. 0.000000001m (equal to one nanometer)

Scientific NotationScientific Notation• To abbreviate very large or very small measurements.• Move decimal point until measurement is between 1

and 10. • standard measurements >1 have a positive exponent.• standard measurements < 1 have a negative

exponent.

Ex.

5,000 g = 5.0x103 g

0.0456 m = 4.56x10-2 m

Chem I : 8/20/13Objectives: • I can calculate using significant figures. • Introduce Measurement Lab

Homework: • Check Infinite Campus-updated grades.• Bring calculators• Complete Sig. Figs. Wksht• Read thru and complete pre-lab qts. for lab.

ICP : 8/20/13Objectives: • I can calculate using significant figures. • Introduce Measurement Lab

Homework: • Check Infinite Campus-updated grades.• Bring calculators• Complete Sig. Figs. Wksht• Read thru measurement lab.

Calculating with Measurements• “Your only as good as your weakest link.”

• An answer from a calculation involving measurements, can only be as accurate (good) as the weakest measurement in the calculation.

Calculating with Sig. Figs.

1. Multiplying and Dividing:The # of sig. figs. in the answer must be equal to

the # of sig. figs. in the weakest (least accurate) measurement.

2. Addition and Subtraction:The # of decimal places in the answer must be

equal to the # of decimal places in the weakest measurement (least accurate).

http://www.sciencegeek.net/Chemistry/Powerpoints2.shtml

Calculating with Sig. Figs.

Chem I : 8/21/13Objectives:

• Review Sig. Fig. calculations

• Complete Measurement Lab

Homework:

• Complete post-lab questions.

• Review notes, wkshts., and bell ringer for quiz tomorrow.

Sig. Figs. and Measurements

Measurement LabPurpose:

• Practice measuring (definite numbers plus first estimated number)

• Apply significant figures with measurements.

ICP : 8/21/13Objectives:

• Review Sig. Fig. calculations

• Complete Measurement Lab

Homework:

• Complete post-lab questions.

• Review notes, wkshts., and bell ringer for quiz tomorrow.

Measurement LabPurpose:

• Practice measuring (definite numbers plus first estimated number)

• Apply significant figures with measurements.

Chem I: 8/22/13

Objectives:

• Bell Ringer: Scientific Notation and Sig. Figs.

• Analyze Measurement Lab Results

• I can convert between units in a measurement.

Homework:

• Scientific Measurement Review Wksht.

• Scientific Measurement Quiz

Chem ICP: 8/22/13

Objectives:

• Bell Ringer: Scientific Notation and Sig. Figs.

• Analyze Measurement Lab Results

• I can convert between units in a measurement.

Homework:

• Scientific Measurement Review Wksht.

• Scientific Measurement Quiz

Bell Ringer: Scientific Measurements1. How many sig. figs are in each measurement

below?

a.0.02050 g b. 1.04 x1028

3.Express the answer to the correct accuracy.

a.5.4 g + 3.24 g = b. 0.25g x 1.050g =

3. Convert each to scientific notation:

a. 0.0035 mL b. 130,000 mi.

4. Convert each to standard notation:

a. 5.4 x10-3 b. 8.2x105

Bell Ringer: Scientific Measurements1. How many sig. figs are in each measurement

below?

a.0.02050 g (4) b. 1.04 x1028 (3)

3.Express the answer to the correct accuracy.

a.5.4 g + 3.24 g = 8.6g b. 0.25g x 1.050g =0.26g2

3. Convert each to scientific notation:

a. 0.0035 mL = 3.5x10-3mL b. 130,000 mi.= 1.3x105

4. Convert each to standard notation:

a. 5.4 x10-3 m = 0.0054m b. 8.2x105m = 820,000m

Measurement LabAnalyze Data:

• Does your quantitative data prove that the best instrument yields the most accurate measurement (most sig. figs)? If not you need to re-check your measurements in the lab.

Metric Conversions

Chem I: 8/23/13

Objectives:

• Scientific Measurement Quiz

• Analyze Measurement Lab Results

• I can convert between units in a measurement.

Homework:

• Scientific Measurement Review Wksht.

• Scientific Measurement Quiz

Chem I: 8/23/13

Objectives:

• Scientific Measurement Quiz

• Measurement Lab

• I can convert between units in a measurement.

Homework:

• Post Lab questions

• Scientific Measurement Review Wksht.

Metric to Englishk h dk base d c ma. How many meters are in a 100 yard football field?

b.How many centimeters are in 2 feet ?

c. Convert 4 pounds (lbs.) to milligrams?

Metric to Englishk h dk base d c m

d. Convert 15 kilometers to miles.

Scientific Measurement Conversions

Chem I: 8/26/13

Objectives:

• Turn in Measurement Lab with post-lab qts.

• Evaluate Scientific Measurement Quiz

• Measurement Conversion Lab

Homework:

• Scientific Measurement Review Wksht.

• Scientific Measurement Test (Wed.)

Chem I: 8/26/13 (3rd )

Objectives:

• Assess and complete Measurement Lab

• Evaluate Scientific Measurement Quiz

• Measurement Conversion Lab

Homework:

• Scientific Measurement Review Wksht.

• Scientific Measurement Test (Wed.)

ICP: 8/26/13

Objectives:

• Turn in Measurement Lab with post-lab qts.

• Evaluate Scientific Measurement Quiz

• Measurement Conversion Lab

Homework:

• Scientific Measurement Review Wksht.

• Scientific Measurement Test (Wed.)

Scientific Measurement Review

Scientific Measurement ReviewGallery Walk Review:

• Independent vs. Dependent Variable

• Graphing Techniques

• Density

• Qualitative vs. Qualitative Data

• Accuracy vs. Precision

• Significant Figures (measurement/calculations)

• Measurement conversions (metric/english)