Unit 1 Review: Equipment, Safety & Classifying Matter
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Transcript of Unit 1 Review: Equipment, Safety & Classifying Matter
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Unit 1 Review:Equipment, Safety
& Classifying Matter
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List four indications that a chemical reaction has occurred.
1.Heat/Light2.Color Change3.Gas produced4.Precipitate
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_______ does the dissolving in a solution.
• Solvent
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Which piece of equipment do you use for obtaining an accurate
measurement of volume?
• Graduated cylinder
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H2 + O2 H2OList the reactant(s)
• H2, O2
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Identify:• Florence Flask
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List an example of a homogeneous mixture.
• Homogeneous = sugar water, salt water, air
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____ is a form of energy
• Heat
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How can you tell that an endothermic process is taking place?
• Feels cold to the touch
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What is the hottest part of a Bunsen burner flame?
• Top of inner cone
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What should you fill the wash bottles with?
• Distilled water ONLY
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_______ is a pure substance that is made from atoms of two or more elements that
are chemically combined
Compound
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What is a chemical change?
• Chemical change = results in a new substance with new properties
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Identify:• Evaporating dish
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H2 + O2 H2OList the product(s)
• H2O
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What are some examples of improper lab attire?
• Flip-flops• Long hair not pulled back• Baggy sleeves• Long jewelry• Shorts• No goggles
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Identify:
• Crucible & Cover
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What are 2 types of pure substances?
• Elements & Compounds
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What is the difference between a proper and improper Bunsen
burner flame?
• Proper is blue w/ 2 cones and an improper yellows at the top and an inner cone is not present.
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Identify:
•Mortar & Pestle
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What is a physical change?
• Physical change = does not change the identity of matter
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______ is the study of the composition, structure and properties of matter
• Chemistry
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You just made sugar water. What is the solute?
• sugar
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What type of change would crumpling up a piece of paper be considered?
Physical change
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What piece of equipment would you use as a cover to the
evaporating dish?
•Watch glass
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What type of change would burning a piece of paper be considered?
• Chemical change
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_______ is a pure substance made of only one kind of atom
• Element
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How can you tell that an exothermic process is taking place?
• Feels hot to the touch
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Define “matter”.
• Anything that has mass and takes up space
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___________________ states that matter is neither created or destroyed by
ordinary chemical or physical changes
The Law Of Conservation Of Matter
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Chemical changes are always accompanied by what type of change?
• Energy change!
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______ is a mixture that is NOT uniform in composition throughout
• Heterogeneous mixture
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________ is a process that releases heat
• Exothermic
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________ gets dissolved in a solution
• Solute
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What is the difference between a mixture and a compound?
• Mixture = pure substances are physically combined
• Compound = pure substances are chemically combined
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Suppose put an ice cube on your hand. In what direction does heat travel? Be
specific
• From your hand to the ice cube
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_________ is a solid that separates from a solution
• Precipitate
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A homogeneous mixture can also be called a ______________?
• Solution
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What does “aqueous” (aq) mean?
• A compound is dissolved in water
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__________ is a mixture that is uniform in composition throughout
• Homogeneous mixture
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List an example of a heterogeneous mixture.
• Heterogeneous = chicken soup, oil and water, sand, soil
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What is energy?
The ability to do work or cause change
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________ is a process that absorbs heat
• Endothermic
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How is matter classified?...Draw the flow chart