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Chemisrty

QuestionAnswer
Chemistry The study of the composition of a substance and the changes they undergo.
Distinguish between physical and chemical properties of matter. Physical properties: it can be observed with out changing the substance. Chemical properties: how matter reacts with other matter.
copper sulfate is a bright blue substance physical
mercury is a liquid at 20 degrees C physical
Methane (natural gas) is flammable chemical
iron reacts with oxygen gas to form iron oxide chemical
Distinguish between physical and chemical changes in matter PC: alters a substance without changing composition. CC: alters a substance while changing it
water is a puddle evaporates on a sunny day physical
a coffee cup shatters when it falls and hits the floor physical
wood is burned in a camp fire chemical
gasoline burns in a car engine chemical
List 3 common states of matter solid,liquid, gas
Describe location and motion of particles in each Solid: vibrate in place and tightly packed. Liquid: close together, moving and can't move past each other. Gas: moving fast and far apart.
Name the two types of pure substances element and compund
Distinguish between elements and compunds Elements: made of only one atom. Compounds: made of one or more atoms.
element or compound: Water (H20) compund
element or compound: Ozone (O3) compound
element or compound: Helium gas (He) element
Distinguish between pure substance and mixtures M: consists of a physical blend of two or more substances. PS: can be described by one chemical formula
PS or mixture: orange soda mixture
PS or mixture:chocolate chip cookie mixture
PS or mixture: calcium pure substance
PS or mixture: sodium chloride pure subastance
Homo or Hetero mixture: milk hetero
Homo or Hetero mixture: clean air homo
Homo or Hetero mixture: sugar-water homo
Homo or Hetero mixture: muddy water hetero
Distinguish between heterogeneous and homogeneous mixtures Homo: completely uniform composition Hetero: not uniform compostion
Na sodium
K potassium
Br bromine
P phosphorous
He helium
Si silicon
Compare and contrast pure research and applied research PR: acquiring knowledge for the sake of knowing it. AR: used to solve real world problems.
Purpose of the scientific method: The scientific method is an approach to the solution of scientific problems.
Steps of scientific method 1. Observe. 2. Research. 3. Hypothesis. 4. Experiment. 5. Analyze data. 6. Develop theory.
Distinguish between scientific laws and scientific theories SL: a concise statement that's summerizes the results of a broad spectrum of observations and experiments. ST: a thoroghly tested explanation of why experiments give certain results.
CH4(g)+2O2(g)-> CO2(g)+2H2O(g) what are the reactants and products of this equation? R:CH4(g)and 2O2(g) P: CO2(g) and 2H2O(g)
Law of Conservation of Mass: The atoms you start with are still there at the end.
Solution: A homogeneous mixture
Solution, suspention, or colloid: Muddy water suspension
Solution, suspention, or colloid: a cola soft drink solution
Solution, suspention, or colloid: mayonnaise colloid
Solution, suspention, or colloid: italian dressing suspension
Solution, suspention, or colloid: sea water solution
Solution, suspention, or colloid:a medicine accompanied by instructions to "shake before use" suspension
Cl chlorine
F fluorine
Cu copper
Iodine I
Created by: dtimon29