Chapter 1

Chapter 1 - CHAPTER 1:- CHEMICAL FOUNDATIONS Scientific...

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CHAPTER 1:- CHEMICAL FOUNDATIONS Scientific Method Observation (Quantitative [measurement, incl. units] vs. Qualitative [observation + description]) Hypothesis Formulation Experimentation o Law: the final end, no exceptions to it, holds high value Summarizes what happens experimentally through observations Ex.: gravity (law, no theory) o Theory: can be worked around with Theories attempt to explain observations and laws; may not be totally correct but can still be useful Ex.: Big Bang Theory, why stars explode (theory, no law) Accuracy vs. Precision o Accuracy: how close a particular value is to the true/accepted value (ex.: π) o Precision (reproducibility): how close several measurements are to each other Types of Error o Random (Indeterminate) : measurement has equal probability of being too high or low o Systematic (Determinate): occurs in same direction (high/low) each time SI Units of Measurement Physical Quantity Name of Unit Abbreviation Mass kilogram kg Length meter m Time second s Temperature Kelvin K Electric current ampere A Amount of substance
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Chapter 1 - CHAPTER 1:- CHEMICAL FOUNDATIONS Scientific...

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