Term
| What are reactants and reagents? |
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Definition
starting materials in a chemical reaction.
ON LEFT SIDE OF CHEMICAL EQUATION |
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Term
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Definition
| substances forme; RIGHT SIDE OF EQUATION |
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Term
What is a chemical change?
What is a physical change?
examples of each |
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Definition
-Chem: new substance formed (change in color, odor, gas, precipitate)
-phys: alteration to sub, no chem alt. (melt,tear paper) |
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Term
| What is the difference between endothermic and exothemric? |
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Definition
EXOthermic is when the container gets hot and produces heat.
ENDO thermic: gets cold, heat absorbed |
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Term
S > L
L > S
L > G
G > L
S > G
G > S |
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Definition
S > L = melting
L > S = freezing
L > G = boiling, evap.
G > L = condensation
S > G = sublimation
G > S =deposition |
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Term
| What is the difference between a homogeneous solution and a heterogeneous mixture? |
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Definition
homo: solution
hetero: visible mixture |
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Term
| What is the difference between filtration and distillation? |
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Definition
FILT: nondisolving solid away from liquid
Dist: seperates liquid |
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Term
| Whats the difference between a substance and mixture? |
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Definition
Substance is definate composition, not physically seperable.
Mixture: two or more physically seperable components in ratios varying from sample to sample |
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Term
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Definition
| seperation prosess where the liquid boils away and leaves only the solid |
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Term
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Definition
removed something from a sticky situation
such as dyed paper and extracting the dye |
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Term
| What is a physical property? Chem prop? |
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Definition
phys: can be measured w/o changing the chemical composure
chem: ablity to mix with other chems |
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Term
| Whats the difference between an extensive property and an intensive property? PHYSICAL PROPERTIES |
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Definition
Extensive? depents on amout of substance
Intensive? does not matter how much is there. |
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Term
| What is the law of conservation of mass? |
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Definition
| Mass isnt created or destroyed |
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Term
| What is the law of conservation of energy? |
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Definition
| energy is neither created nor destroyed |
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Term
| What is the law of definite properties? Constant composition? |
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Definition
| Compounds always have a definite proportion! |
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Term
| What is the law or multiple proportions? |
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Definition
| different proportions create different substances! |
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