Chemistry test

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jfindley
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260239
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Chemistry test
Updated:
2014-02-04 18:07:53
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chemistry
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  1. What are physical properties?
    can be observed without chemically changing matter
  2. What are chemical properties?
    describe how a substance interacts with other substances
  3. What type of property is malleability?
    psychical
  4. What type of property is density?
    physical
  5. What type of property is color?
    physical
  6. What type of property is shape?
    physical
  7. What type of property texture?
    physical
  8. What type of property is mass?
    physical
  9. What type of property is ductility?
    physical
  10. What type of property is conductivity?
    physical
  11. What type of property is solubility?
    physical
  12. What type of property is re activity?
    chemical
  13. What type of property is combustability?
    chemical
  14. What type of property is flammability?
    chemical
  15. What type of property is acidity?
    chemical
  16. What type of property is the ability to rust?
    chemical
  17. What is a physical change?
    no change in identity of substance
  18. What is a chemical change?
    one or more new substances is created
  19. What is the density of water?
    1.0
  20. What is the freezing point of water?
    0 degrees celcius
  21. What is the boiling point of water?
    100 Celsius
  22. When does liquid turn to solid?
    freezing point
  23. When does solid turn to liquid?
    melting point
  24. What two points are the same?
    melting and freezing
  25. When does liquid turn to gas?
    boiling point
  26. When does gas turn to liquid?
    Condensation point
  27. When does solid turn to gas?
    sublimation point
  28. What type of change is acid rain?
    chemical
  29. What is the law of conservation of mass?
    mass cant be created or destroyed
  30. What is an Element?
    pure substance made of one kind of atom
  31. What is and element represented by?
    one or two letter symbol
  32. What is a compound?
    two or more elements chemically combined
  33. What are compounds represented by?
    chemical formula
  34. What proportions do compounds combine in?
    the same proportions
  35. What is a mixture?
    two or more substances physically combined
  36. What proportions do mixtures combine in?
    not the same proportions
  37. What is a heterogeneous mixture?
    not uniform
  38. What are homogeneous mixtures
    uniform
  39. What is an alloy?
    solution of two or more metals
  40. What is hydrogen peroxide?
    coumpound
  41. What is carbon dioxide?
    compound
  42. What is rust?
    compound
  43. What is carbon?
    element
  44. What is steel?
    solution
  45. What is lead?
    element
  46. How can the components of a mixture be separated with physical properties?
    • magnetism¬†
    • density
  47. What is centrifuge?
    an instrument that uses density to separate mixtures when tiny solid particles are dissolved in water
  48. What is used to separate liquids and solids?
    filtration
  49. What is used to separate solutions
    • evaporation
    • distillation
  50. An object will float in water if?
    its density is less than 1.0
  51. An object will sink in water if?
    its density is greater than 1.0
  52. What is the formula for density?
    mass divided by volume
  53. What are intensive physical properties?
    • remain the same no matter how of of the substance you have
    • ex density
  54. What are extensive physical properties?
    • depend on the amount of substance present
    • ex- mass, volume, length
  55. What is suspension?
    • heterogeneous mixtures
    • particles will settle out over time
    • particles are large
    • can be separated by fileration
  56. What are colloids?
    • homogeneous mixtures
    • medium sized particles
  57. What is the Tyndall effect?
    scattering of light by a colloid
  58. What are examples of suspensions?
    • glue¬†
    • dirt water
  59. What are examples of colloids?
    • milk
    • blood
    • smoke
    • clouds
    • mayonnaise
    • marshmellows
  60. What are Solutions?
    • constant composition that is uniform throughout
    • small particles
    • can be solid (alloy), liquid, or gas
  61. What is a solute?
    gets dissolved
  62. What is solvent?
    does the dissolving
  63. What is filtration?
    technique that uses a porous barrier to separate a solid from a liquid
  64. What is distillation?
    separation based on differences in the boiling points of substances involved
  65. What is crystallization?
    separation resulting in the formation of pure solid particles of a substance from a solution
  66. What is Chromatography?
    separates the components of a mixture on the tendency of each to travel or be drawn across the surface of another material

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