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