Chemistry FINAL
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| Define physical change. | a substance changing from one state of matter to another.
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| List 13 physical properties. | color, smell, freezing point, attraction, repulsion, magnets, opacity, density, viscosity, heat combustion, sublimation, acid resistance, length of metal object, magnetizing steel.
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| Define chemical change. | A change in a substance that involves the rearrangement of the way the atoms are bonded.
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| List 6 chemical properties. | heat combustion, reactivity with water, PH, electromotive force, reactivity, combustible.
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| What are the two things a solid have | Definite shape and volume
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| What are the two things liquids have | No definite shape but definite volume.
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| What are the two things gases have | No definite shape no definite volume.
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| What is Distillation? | Liquid to Gas to Liquid
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| What is sublimation? | solid to gas to solid
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| what is recrystallization? | solid to liquid to solid
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| what is dissolution? | Involves a material (usually a solid) disappearing when placed into a liquid. Example sugar in water
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| What is crystallization? | The reverse of dissolution. Example evaporating away the water to retrieve the sugar.
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| What is recrystallization? | combing both processes.
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| Time for the Atomic Theory Quiz. (turn to page two) | I'm already
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| Non-metal to non-metal make what bond. | A coefficient bond.
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| Metal to non-metal make what bond. | A Ionic bond.
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| What makes a Isotope unique? | A Isotope has more/less number of neutrons in the atom so the mass of the atom will be different.
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| What is the Isotope of carbon with 8 neutrons? | Carbon-14
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| list the three groups on the periodic table? | Metals, non-metals, and metalloids.
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| What is the most reactive non-metal and metal groups. | Group 1 and group 17.
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| When is the appropriate time to use brackets with charges. | When showing bonding through ions.
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| What type of bond and how many connections does H4C2 have when bonded? | Ionic bond because of the single transfer of valence electrons and its a double bond between the carbon and a single with the hydrogen's.
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| What type od bond and how many connections does H20 have when bonded? | Ionic bond and single bond.
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| How many valence electrons are ____________ and how many connections does N2 have when bonded. | 3 valance electrons are shared and have a 3 bond connection.
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| On the back of your atomic theory quiz we are going to do chemical equations. | ok
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| CO + O2 = CO2 solve | *show you the paper
2CO + OS = 2CO2
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| NaNO3 = NaNO2 + O2 | *show you the paper
4NaNO3 = 3NaNO2 + O2
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| What is synthesis and give a example | two or more substances react to from a single substance. Ex):
2Na + 2Cl = 2NaCl
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| What is decomposition and give a example | a compound breaks down into two more simpler substances. Ex):
2HO = H2 + O2
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| What is single replacement and give example | one element takes the place of another element in a compound Ex):
A + BC = A +AC
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| What is double replacement and give example | two element takes the place of another element in a compound. Ex):
AB + CD = AD + CB
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| What is combustion and give a example | Combustion is when all substances in the compound are combined with oxygen and produces carbon dioxide and water.
Ex):
AB + O2 = CO2 + H2O
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| What is Avogadro's number and what does it help us find? | Avogadro's number is 6.02*10^23. this number is used to find the exact mass of the atom.
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| What is the mol of Carbon and Hydrogen 2 | mol = 14
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| What is the difference between Endothermic and Exothermic? | Endothermic absorbs heat from its surroundings and Exothermic releases heat into its surroundings.
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| What do temperature, particle size, pressure, stirring, concentration and catalyst have in common with rate of reaction. | All of these factors increase the rate of reaction.
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| Fill this out on back of sheet | ok
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| How many moles of CaCl2 are produced with 45g of calcium chlorine? | 45g CaCl2 * 1mole Cacl2/110g CaCl2 = 0.49 mol
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| How many grams are in 2.4 moles of Sulfur? | 2.4 mol * 32gs/1m = 76.8grams
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