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Accuracy and precision

AP Chemistry Zumdahl 7E Chapter 1 Notes

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measurement
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Scottish inventions
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Significant Figures
Celsius
Temperature
International System of Units
Accuracy and precision
Scientific Notation
Gas constant

1 AP Chemistry A. Allan Chapter 1 Notes - Chemical Foundations 1.1 Chemistry: An Overview A. Reaction of hydrogen and oxygen 1. Two molecules of hydrogen react with one molecule of oxygen to form two molecules of water 2H2 + O2 ? 2H2O 2. Decomposition of water 2H2O ? 2H2 + O2 B. Problem Solving in Chemistry (and life) 1. Making observations 2. Making a prediction 3. Do experiments to test the prediction 1.2 The Scientific Method A. General Framework 1. Making observations a. Quantitative ( measurement) b. Qualitative (color, phase, shape, etc) 2. Making a prediction 3. Do experiments to test the prediction B. Vocabulary 1. Observation a. Something that is witnessed and can be recorded 2. Theory (Model)

Chapter 1

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Significant Figures
Uncertainty
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Trailing zero

Chapter 1.3 (Pages 8-10) SI system- International System of units. Based on/ Derived from metric system. Quantitative Observation- Measurement Consists of a number and a scale (unit) Mass- Measure of resistance of an object to a change in its state of motion Weight- Force gravity exerts on an object Chapter 1.4-1.5 (pages 11-18) Uncertainty- Estimated number in a measurement A measurement always has some degree of uncertainty Assumed to be +/- 1 unless otherwise indicated Precision- the degree of agreement among several measurements of the same quantity (reproducibility) Accuracy- Agreement of a particular value with the true value Errors:

Chapter 2 Outline

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International System of Units
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Decibel
Scientific Notation
Arithmetic precision
Uncertainty
Significant Figures
Measurements and Calculations

Pre-AP Chemistry Modern Chemistry (2006) Chapter 2 Notes-Measurements and Calculations 2.1 The Scientific Method The process that researchers use to carry out their investigations is often called the scientific method. The scientific method is a logical approach to solving problems by observing and collecting data, formulating hypotheses, testing hypotheses, and formulating theories that are supported by data. 2.2 Units of Measurement Units of Measurement Measurements are quantitative information. They represent quantities. A quantity is something that has magnitude, size, or amount. A quantity is not the same as a measurement. For example, the quantity represented by a teaspoon is volume. The teaspoon is a unit of measurement, while the volume is a quantity.

Chapter 2 Outline

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Chemistry
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measurement
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Accuracy and precision
Units of measurement
International System of Units
Decibel
Scientific Notation
Arithmetic precision
Uncertainty
scientific method
Significant Figures
Measurements and Calculations

Pre-AP Chemistry Modern Chemistry (2006) Chapter 2 Notes-Measurements and Calculations 2.1 The Scientific Method The process that researchers use to carry out their investigations is often called the scientific method. The scientific method is a logical approach to solving problems by observing and collecting data, formulating hypotheses, testing hypotheses, and formulating theories that are supported by data. 2.2 Units of Measurement Units of Measurement Measurements are quantitative information. They represent quantities. A quantity is something that has magnitude, size, or amount. A quantity is not the same as a measurement. For example, the quantity represented by a teaspoon is volume. The teaspoon is a unit of measurement, while the volume is a quantity.

DBA

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Critical Thinking
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Significant Figures
Attachment theory

DBA for Module 1: What is the definition of science. Science is The study of physical properties and the history of the natural world. What is the difference between precision and accuracy: precision is given by the ability of the instrument to get as close to the true value of the measurement as possible. some measuring instruments are more precise then others. In other words, an instrument that measures to the nearest 100th place is more precise than the one that measures to the nearest 10th place. Accuracy is how accurate your measurement is. How careful one is in reading the measurement correctly. How are significant figures used in calculations?

Chemistry lab guide

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Measurement uncertainty

? IB Chemistry Student Guide to Internal Assessment Written Reports 2011 As a guide use the underlined headings as subheadings for your write up. Date This refers to the date that the experiment was performed and not the date of the write-up. Name Ensure that your name is very clear. Design Your teacher will give you an open ended problem to investigate. From this you must formulate a research question. Research Question
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