Question 1 What is the Molecular formula for water? Answer 1 H2O Question 2 Water has an uneven distribution of charges, making it what type of molecule? Answer 2 Polar Question 3 Due to this uneven sharing of electrons, the Oxygen atom has a slightly ___________ charge. Answer 3 Negative Question 4 Water’s ability to stick to itself is known as… Answer 4 Cohesion Question 5 What property of water allows this water strider to walk on top of a pond? Answer 5 Surface Tension Question 6 This property of water makes it difficult to remove a wet microscope slide from a table. Answer 6 Adhesion Question 7 The following pictures show a phenomena known as a meniscus. What property/properties of water causes this? Answer 7 The water molecules on the side of the graduated cylinder ADHERE to the glass. Question 8 What property of water allows water to reach the leaves of tall trees? Answer 8 Capillary Action Question 9 Why can capillary action only occur in small tubes? Answer 9 Capillary action in larger tubes can not overcome the force of gravity. Question 10 A substance that dissolves in water is known as a ___________. Answer 10 Solute Question 11 Water’s pH is usually around ______, making it ideal for supporting life Answer 11 7 (Neutral) Question 12 A new substance is found. You decide to see if it dissolves in water. You find that the substance clumps up and does not dissolve. What can you conclude about the polarity of this substance? Answer 12 This substance is non-polar! “Likes dissolve likes” Question 12 Would this new substance dissolve in oil? Answer 12 Yes! Oil is non-polar, and the new substance is as well. “Likes Dissolve Likes” Question 13 You suspect that a factory is dumping harmful bases into a nearby river. What property should you test the river for? Answer 13 pH Question 14 Give an example of a pH level that would support your hypothesis that the factory is dumping bases into the river. Answer 14 pH ranging from more than 7-14 Question 15 Why is water considered an inorganic molecule? Answer 15 It does not contain CARBON! Question16 You fill a glass bottle with water and put in the refrigerator overnight. When you wake up the next morning, you find the glass has shattered. What property of water can explain this? Answer 16 Water becomes less dense when it freezes. It is very unique in the fact that it expands when it freezes. Question 17 What would happen to lakes and ponds if water did NOT become less dense as it freezes? Answer 17 They would freeze solid Question 18 Why is water considered the elixir of life?