Unit 2 Part B Question Preview (ID: 49202)
Solutions, Acids, Bases And PH, Gas Laws.
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When a cold tire is inflated to a certain pressure and then is warmed up, the pressure increases. This happens because
a) Air molecules diffuse rapidly through the walls of the tire
b) Air molecules hit the walls of the tire less frequently
c) Rubber in the tire reacts with oxygen in the atmosphere
d) Air molecules speed up and collide with the tire walls more often
What term describes the Kool aid powder when you make Kool aid?
a) solution
b) solvent
c) solute
d) solubility
Milk is a weak acid. What is the pH range that milk would fall into?
a) 0.5-2.5
b) 5.0-6.5
c) 7.5-8.0
d) 12.5-13.0
What is the ion formed by bases?
a) H+ (hydronium ion)
b) CO3-2 (carbonate ion)
c) OH- (hydroxide ion)
d) SO4-2 (sulfate ion)
Which of these has the most H+ concentration?
a) KCl (pH of 7.0)
b) CH3COOH (pH of 2.9)
c) NaHCO3 (pH of 8.5)
d) HCN (pH of 5.1)
For most solutes, what is the relationship between temperature and solubility?
a) increasing the temperature increases the solubility
b) increasing the temperature decreases the solubility
c) decreasing the temperature increases the solubility
d) there is no relationship, agitation is more important
Which of these factors does NOT affect solubility?
a) The temperature of the water
b) The size of the crystals
c) Agitation
d) The amount of solute
Which statement best describes the motion of atoms of iron at 200 C? (~700 F)
a) The atoms move slowly and are far apart
b) The atoms move quickly and are far apart
c) The atoms move slowly and are close together
d) The atoms move quickly and are close together
When water is boiling, why does the temperature remain constant even though the stove is continually adding energy?
a) The energy is used to convert water into steam
b) The energy is escaping through the pot
c) The bubbles release heat
d) The extra energy goes into cooking the food
What is the most common state of matter in the universe?
a) solid
b) liquid
c) gas
d) plasma
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