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PS CH 8 Test
Prispevano od: Conway
  • 1. Can gasses dissolve?
A) no
B) yes
  • 2. What gas dissolves in the blood and tissues of scuba divers?
A) nitrogen
B) argon
C) helium
  • 3. This is the substance that is dissolved.
A) suspension
B) solvent
C) solute
  • 4. This is the substance that does the dissolving.
A) suspension
B) solute
C) solvent
  • 5. What is the universal solvent?
A) alcohol
B) water
C) salt
D) oil
  • 6. What is the most abundant gas in air and what percentage is it?
A) 0.04 % carbon dioxide
B) 78 % nitrogen
C) 100 % radon
D) 21 % oxygen
  • 7. Name three other gasses in air?
A) mud, salt, coffee
B) baking soda, sugar, fructose
C) oxygen, carbon dioxide, water vapor
  • 8. Which of these is NOT one of the three ways that substances can dissolve in water?
A) polarization
B) dissociation
C) ionization
D) dispersion
  • 9. Sodium chloride is a ____________ compound and water is a ______________ molecule.
A) ionic ; polar
B) nonpolar; ionized
C) covalent ; ionic
  • 10. This is the process by which ionic compounds separate in to ions and dissolve.
A) polarization
B) dispersion
C) dissociation
  • 11. Both sugar and water are ___________ molecules
A) polar
B) nonpolar
C) valence
D) ionic
  • 12. The sugar dissolves in water by the process of _____________.
A) dissociation
B) ionization
C) dispersion
  • 13. The process in which neutral molecules gain or lose electrons is known as _____________.
A) ionization
B) dispersion
C) polarization
  • 14. What is the chemical formula of hydronium?
A) NH4+
B) H3O+
C) OH-
  • 15. What type of compound conducts electric current when dissolved in water?
A) nonelectrolyte
B) electrolyte
  • 16. Hydronium ions make a solution be a (an) ______________
A) acid
B) base
C) neutral
  • 17. What happens to the freezing point of a liquid when a substance is dissolved in it?
A) remains the same
B) decreases
C) increases
  • 18. What happens to the boiling point of a liquid when a substance is dissolved in it?
A) increases
B) remains the same
C) decreases
  • 19. We use this substance in the radiator of our cars to prevent the cooling fluid from boiling when its hot and from freezing when its cold.
A) transmission fluid
B) gasoline
C) antifreeze
D) hydraulic fluid
  • 20. What happens to the temperature of water when sodium hydroxide is dissolved in it?
A) decreases
B) increases
C) remains the same
  • 21. This means that heat is released.
A) heterogeneous
B) endothermic
C) homogeneous
D) exothermic
  • 22. This means that heat is absorbed.
A) homogeneous
B) exothermic
C) endothermic
D) heterogeneous
  • 23. Why does a cold pack that is used for first aid get cold when activated ?
A) the boiling point changes
B) the freezing point changes
C) it absorbs heat when the solute dissolves
D) it releases cold when the solute dissolves
  • 24. Which of these factors DO NOT affect the rate of dissolving?
A) stirring the solutions
B) the color of the solute and solvent
C) the temperature of the solvent
D) the surface area of the solute
  • 25. What can be done to a saturated solution of sugar and water to make more sugar dissolve in it?
A) cool off the solution
B) heat up the solution
C) add more sugar to the solution
D) stir the solution
  • 26. Oil is ________________ and water is ___________________
A) ionic; ionic
B) nonpolar; polar
C) polar;covalent
D) covalent;nonpolar
  • 27. Why do bubbles form inside a pan of water as the temperature increases?
A) the heat increases the solubility of gases
B) greenhouse gases are produced
C) dissolved gasses come out of solution
D) hydrogen escapes the water
  • 28. Why do bubbles made of carbon dioxide appear when you first open a bottle or can of soda pop?
A) the water in the soda has a high freezing point
B) the pressure is suddenly reduced
C) the sugar in the soda makes the bubbles
D) the temperature decreases
  • 29. What acid is in carbonated beverages?
A) carbonic acid
B) sulfuric acid
C) boric acid
D) lactic acid
  • 30. What acid is in our stomachs?
A) nitric acid
B) bubonic acid
C) phosphoric acid
D) hydrochloric acid
  • 31. How do acids taste?
A) sweet
B) bitter
C) sour
  • 32. What happens to blue litmus paper when it touches an acid?
A) it turns black
B) it turns blue
C) it turns red
D) it turns yellow
  • 33. What is the formula of the hydroxide ion that is formed when a base dissolves in water?
A) H3O+
B) OH-
C) CH4
D) CO32-
  • 34. How do bases taste?
A) sour
B) bitter
C) sweet
  • 35. How do bases feel when you touch them?
A) sticky
B) slippery
C) powdery
  • 36. What happens to red litmus paper when it touches a base?
A) it turns blue
B) it turns red
C) it turn pink
D) it turns white
  • 37. What is the name of the indicator that turns red in a base but stays colorless in an acid?
A) ammonium nitrate
B) phenolphthalein
C) sodium acetate
D) ethylene glycol
  • 38. What type of reaction occurs when and acid and a base are mixed?
A) oxidation
B) neutralization
C) base reduction
D) combustion
  • 39. What two products are ALWAYS formed in a neutralization reaction?
A) sugar and water
B) rust and salt
C) salt and water
D) gas and water
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