Water Lab

This practice quiz is based on the Lab #2: Water. After thorough preparation for the first lab exam, to help test your readiness, quiz yourself and determine which concepts need more attention. The actual exam will not be the same as this one, however some questions may repeat. You may repeat taking this quiz. Questions will vary.
Please note that the actual lab exam will be mostly one word or short answers. For this quiz most questions are multiple choice because this computer corrected version will only count your answer as correct if your answer is exactly the same as the answer key. Therefore some correct answers may be marked wrong.

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1. When the negatively charged rod was held up to the stream of water, the water _____________________ the rod.

2. What property of water causes adhesion?

3. In what type of tube will water climb higher – one with a narrow diameter or wide diameter?

4. Oil is a __________ substance and this stops it from being soluble in water.

5. Water heats more slowly than oil Before the water can heat up ______________________.

6. In all substances temperature determines the state of matter (solids, liquids and gases). What is the major difference between the states of matter (i.e., what does temperature measure)?

7. Give the letter of the solution that is most basic?
02.pH_teststrip_quiz.JPG

8. Read the chart to give the pH of the test strip. Give a numeric answer.
02.pH_teststrip_quiz2.JPG

9. ______ is the term for the measure of the abundance of H+ (hydrogen ions) in solution.

10. In our experiment the osmometers were place in pure water. Which of the three osmometers would shrink fastest if they had been prepared in the same way but had been placed in a solution of 15% sucrose (instead of pure water)? Give the letter.
02.osmometer_quiz.JPG

11. If an osmometer was filled with pure water, predict what would happen to its volume when this osmometer was placed in a solution of 15% sucrose. It would ______________.

12. Newly created question
Define concentration gradient:

13. When ice melts on the surface of a lake, what happens to that water?

14. When ice on a frozen lake melts in the spring _________ are brought up from the bottom and __________ is brought from the surface down to the bottom.

15. When detergent was added to the water the floating pin dropped. How did the detergent cause this to happen?
the detergent weighed down the pin
the detergent disrupted the surface by making a wave
the detergent bonded to the pin on one end and the water on the other end
the detergent disrupted the hydrogen bonds
the detergent made a new surface layer replacing the water

16. What aspect of the structure of detergent makes it useful to wash oil off of dishes?
one end bonds with water, the other bonds with oil
detergent is polar
detergent is non-polar
detergent is soluble in oil

17. Which statement is true for ice interacting with liquid water?
ice has all four hydrogen bonds in place
all of these are true
ice is less dense than liquid water
water molecules in ice are farther apart than in liquid water
ice is the only solid that floats

18. Which substance is non-polar?
salt
sugar
oil
alcohol

19. When you held the negatively charged rod up to the stream of water, the water bent toward the rod. Give the name for the property of water that caused it to bend.
polarity
cohesion
capillarity
adhesion
hydrogen bonding

20. What word means that water sticks to other water molecules?
osmosis
adhesion
capillarity
polarity
cohesion

21. What is the name for the property of water that causes the water to “ball-up” on the parafilm?
capillarity
cohesion
osmosis
adhesion
polarity

22. If a solution has a lower abundance of H+ (hydrogen ions) than OH- (hydroxyl ions) in solution we refer to it as being _______________.
basic
acidic
soluble
polar
neutral

23. A solution with the pH of 4 has ________ times higher H+ concentration than a solution with pH 6.
20
10
100
2
1000