Lesson_2 - Stoichiometry Chapters 1, 2, 3 and 4 (Petrucci...

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Lesson 2 Stoichiometry Chapters 1, 2, 3 and 4 (Petrucci et al.)
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Lesson 2 Classification of matter
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Lesson 2 Review of basic definitions Element: composed of identical atoms that cannot be decomposed into simpler substances by chemical methods. Ex: carbon, gold, chlorine. Atom: the smallest unit that maintains the properties of the element. Isotope: atoms of the same element having different atomic masses, i.e. same number of protons (atomic number), but different number of neutrons.
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Lesson 2 (a) Separation of a heterogeneous mixture by filtration : Solid copper(II) sulfate is retained on the filter paper, while liquid hexane passes through. (b) Separation of a homogeneous mixture by distillation : Copper(II) sulfate remains in the flask on the left as water passes to the flask on the right, by first evaporating and then condensing back to a liquid. (c) Separation of the components of ink using chromatography : A dark spot of black ink can be seen just above the water line as water moves up the paper. (d) Water has dissolved the colored
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This note was uploaded on 04/13/2009 for the course CHEMISTRY 102 taught by Professor Soares during the Spring '09 term at Waterloo.

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Lesson_2 - Stoichiometry Chapters 1, 2, 3 and 4 (Petrucci...

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