ta study guide test 1 ch 1-6

ta study guide test 1 ch 1-6 - BILD 1 (BEVER) Section:...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
BILD 1 (BEVER) Section: Sharleen, M 2-2:50pm Facts… -Water naturally in all three physical states of matter: solid, liquid and gas. -Water polar - 4 Emergent Properties of water 1. Cohesion 2. Moderation of Temperature 3. Insulation of bodies of water by floating ice 4. The solvent of life I Cohesion A. Definition: the binding together of like molecules due to hydrogen bonding B. Purpose: contributes to the transport of water and dissolved nutrients against gravity in plants. I Adhesion A. Definition: the clinging of one substance to another (the attraction between different kinds of molecules) B. Purpose: adhesion of water to the walls of the cells helps counter the downward pull of gravity. I Moderation of Temperature A. Water has high specific heat (Specific heat = amount of heat absorbed or lost for 1.0g of that substance to change its temperature by 1C) B. Water has a high heat of vaporization meaning the quantity of heat a liquid must absorb for 1.0g of it to be converted from the liquid to the gas state. C. Basically, it’s hard to change the temperature of water or make it boil which is important for highly temperature sensitive bodily functions I Water is one of the only a few substances that is less dense as a solid than as a liquid . This fact is important in that is ice were more dense than its liquid water form, ice would sink which would eventually cause all bodies of water to freeze, causing life as we know it cease to exist, I Water is the solvent of life . A. Due to water’s molecular polarity, it easily attracts other polar molecules and therefore is considered a very good solvent (i.e. found in blood, lymph, etc.) B. When talking about solubility, the dissolving agent of a solution is the solvent, and the substance that is dissolved is the solute. C. Molarity = number of moles of solute per liter of solution-unit of concentration (Ex: 1 M per liter) Acid/Base I Acid : a substance that increases the hydrogen ion concentration of a solution. I Base : is a substance that reduces the hydrogen ion concentration of a solution, I pH : is a measure of hydrogen ion concentration and is equal to –log[H+] and, ranges from 0-14, where a pH of 0-7 is acidic and 7-14 is basic I Buffers : are substances that minimize changes in the concentrations of H+ and OH- in solution. Chapter 4: Carbon and the Molecular Diversity of Life h Organic compound = a compound which contains carbon A. 6 Major Elements of Life = carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
B. Carbon can form 4 bonds: i. C has 4 electrons in its valence shell, and therefore can form 4 covalent bonds to reach a full valence of 8 ii. The ability of carbon to form four bonds makes the formation of a great diversity of molecules possible
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/02/2008 for the course BILD 1 taught by Professor Unk during the Spring '08 term at UCSB.

Page1 / 5

ta study guide test 1 ch 1-6 - BILD 1 (BEVER) Section:...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online