311C F08 Worksheet_2+A - NAME_KEY_ DiscussionWorksheet#2

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NAME _____________ KEY ________ BIO 311C F08 Discussion Worksheet #2 1. What is the maximum number of hydrogen bonds a water molecule can form? ______ 4 _____ 2. If the temperature of a body of water increases, what happens to the hydrogen bonds between the water molecules? Circle one: Hydrogen bonds are formed. Hydrogen bonds are broken . 3. A gram of water at 0 o C occupies more or less (circle one) volume than a gram of water at 4 o C. Why? Water expands as it cools below 4 o C. 4. When a salt is dissolved in water, salt is the ( solute or solvent ) and water is the ( solute or solvent ). (Circle one for each). 5. Is table salt (NaCl) hydrophilic or hydrophobic? __ hydrophilic __. What happens to the NaCl when it is added to water? Ionic bonds between Na+ and Cl- are broken. Each ion becomes hydrated (surrounded by water molecules). 6. In pure water, the concentration of H + is __ 10 -7 M __and the concentration of OH - is ___ 10 -7 M __. 7.
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311C F08 Worksheet_2+A - NAME_KEY_ DiscussionWorksheet#2

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