082708 - why something happens experimentally y A model is...

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CHEMICAL FOUNDATIONS Zumdahl Chapter 1
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Why Study Chemistry? y Definition: The scientific study of matter, it properties, and interactions with other matter and with energy y Why do we care?
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What Will We Learn? Chapter Chapter Contents Contents 1 Chemical Foundations 2 Atoms, Molecules, and Ions 3 Stoichiometry 4 Solution Stoichiometry 5 Gases 6 Thermochemistry 7 Atomic Structure and Periodicity 8 Bonding: General Concepts 9 Covalent Bonding: Orbitals 10 Liquids and Solids 11 Properties of Solutions
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Scientific Method 1. Observations Quantitative Qualitative 2. Formulating Hypothesis 3. Performing Experiments 4. Test Hypothesis on New Experiments
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Law vs. Theory y A law summarizes what happens experimentally through observations y A theory is an attempt to explain
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Unformatted text preview: why something happens experimentally y A model is an approach that is not totally correct but still useful Accuracy vs. Precision y Accuracy is how close a particular value is to the true value y Precision is how close several measurements are to each other Accuracy vs. Precision Types of Error y Random Error (Indeterminate Error) measurement has an equal probability of being high or low (precision) y Systematic Error (Determinate Error) occurs in the same direction each time (high or low), often resulting from poor technique or uncalibrated instrument (accuracy) Units of Measurement Exponential Notation Significant Figures...
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082708 - why something happens experimentally y A model is...

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