Download - Changes of matter: Credit NC State DPI
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Overview of Matter
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Matter Flowchart
MATTER
Can it be physically separated?
Homogeneous Mixture
(solution)
Heterogeneous Mixture Compound Element
MIXTURE PURE SUBSTANCE
yes no
Can it be chemically decomposed?
noyesIs the composition uniform?
noyes
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Mixtures
• Variable combination of 2 or more pure substances.
Heterogeneous Homogeneous
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Pure Substances
• Element– composed of identical atoms
– EX: copper wire, aluminum foil
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Pure Substances
• Compound
– composed of 2 or more elements in a fixed ratio
– properties differ from those of individual elements
– EX: table salt (NaCl)
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Physical Properties of Matter
• Melting Points
• Boiling Points
• Density
• Solubility
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Melting and Boiling Points
• Use the Reference Tables to determine the following:– Rank the following substances from
smallest melting point to largest melting point:
H2O, N2, iron, lead, O2, C12H22O11
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Reference Tables con’t
• What is the state of matter (solid, liquid, or gas) will each of the following substances at the given temperature?a. chlorine at -25 oCb. ethanol at 0 oCc. sodium chloride at 1500 oCd. methanol at -100 oCe. sulfur dioxide at 10 oC
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Density
• Using the reference tables, determine the following:– Rank the following substances from
greatest density to smallest density:
H2O, Mg, C6H14, Pb, methanol, NaCl
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Reference Tables con’t
• What is the mass of 36.5 mL of ethanol?
• What is the volume of 50.0 g of molten lead?
• You have 100.0 cm3 of glucose and sucrose. Which sample has the greatest mass? Support answer with calculations.