1.1 what is chemistry objectives define chemistry differentiate between microscopic and macroscopic...

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1.1 What is Chemistry Objectives •Define Chemistry •Differentiate between microscopic and macroscopic •Know the relationship between pure and applied chemistry •ID and describe the 5 primary disciplines of chemistry •Real World

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Page 1: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

1.1 What is Chemistry

Objectives• Define Chemistry• Differentiate between microscopic and

macroscopic• Know the relationship between pure and

applied chemistry• ID and describe the 5 primary disciplines of

chemistry• Real World

Page 2: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

1.2 The Scientific MethodObjectives• Describe how the Renaissance period in

history changed the approach to science.• Identify the steps of the scientific method.• Differentiate between the independent

variable and the dependent variable in an experiment.• Differentiate between Scientific Theory and

Scientific law

Page 3: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

1.3 The International System of Units

Objectives: • Identify the seven base units of the International

System of Units.• Know the commonly used metric prefixes.• Use scientific notation to express large and small

numbers.• Distinguish between mass and weight.• Convert between the Celsius and Kelvin

temperature scales.• Understand energy as combinations of SI Units.

Page 4: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

Measurement SI Base Unit Symbol

Length Meter m

Mass Kilogram kg

Temperature Kelvin K

Time Second s

Amount Mole mol

Light Intensity Candela cd

Electric Current Ampere A

Page 5: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

1.4 Identify and use conversion factors.

• Use the method of dimensional analysis to convert between units.

Page 6: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

1.5 Uncertainty in Measurements

• Distinguish between accuracy and precision in measurements.• Calculate the percent error of a measured quantity.• Report measured values to the correct number of

significant figures based on the measuring tool.• Perform calculations with measured quantities,

rounding the answers to the correct number of significant figures.

Page 7: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

Types of DataData refers to

information

Qualitative DataDescribes somethingTexture, Color, etc

Quantitative DataMeasures SomethingLength, Mass, Time,

etc

Page 8: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

Determine if each of the following is a qualitative or

quantitative measurement.

A.The sandwich has ham in it. B.There are four eggs in the

carton. C.I used 230 grams of NaOH. D.I added water to the solution.

Page 9: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

MeasurementsAccuracy

How close a measurement comes to the accepted answer

PrecisionHow close a series of measurements are to each other.

How specific an measurement is10 vs. 10.01 vs. 10.007

Page 10: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

Let’s use a golf analogy

Page 11: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

Accurate? No

Precise? Yes

Page 12: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

Accurate? Yes

Precise? Yes

Page 13: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

Precise? No

Accurate?No

Page 14: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

Accurate? Yes

Precise? We can’t say!

Page 15: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

Accurate? Precise?

Page 16: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

Accurate? Precise?

Page 17: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

Accurate? Precise?

Page 18: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

ErrorAccepted value – The right answer• Based on reliable references• Also called Theoretical Yield

Experimental Value- what you get in lab• Also called Actual Yield

Page 19: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

MeasurementsDetermining Error

How far your measurement is from the accepted value.

Value AcceptedValue alExperimentError

Page 20: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

Percent Error

errorPercent Error = 100%

accepted value

Page 21: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry
Page 22: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

How many sig figs in the following measurements?

1.770 mL2.0.0700 mL3.7070 mL4.0.007 mL5.7000 mL6.70.070 mL7.77.0 mL

Page 23: 1.1 What is Chemistry Objectives Define Chemistry Differentiate between microscopic and macroscopic Know the relationship between pure and applied chemistry

1.6 Understanding Density

• Understand density as a physical property of matter.• Perform calculations with derived units, including

density.