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Biochemistry Chemical reactions in living things.
Water Water is the most important inorganic compound in living things because….. Most cellular activities take place in water solutions
Water Polar molecule - has polar covalent bonds. O has a slight (-) charge H has a slight (+) charge (-) O H H (+) (+) Polar water molecules interact with each other by forming hydrogen bonds.
Properties of Water Cohesion: the tendency of molecules to stick together.
Properties of water (con’t) Adhesion: the attractive force between different substances. Example: trees transport water from roots to leaves.
Properties of water (con’t) Surface tension: a measure of how difficult it is to break the surface of a liquid. insects “walk” on the surface of water.
Properties of water (con’t) High heat capacity: has ability to resist temperature change. the ocean stores heat from the sun and gives it off during cooling, keeping the climate more mild.
Properties of water (con’t) Good solvent: dissolves many solutes in all cells, blood, and plant sap.
the concentration of hydrogen ions in solution Water molecules dissociate into ions (H+) and (OH-) pH
pH (con’t) Acid- chemical compound that donates H+ atoms to solution Base- compound that accepts H+ atoms and removes them from solution
pH (con’t) pH scale 0-14 range 7 neutral 0-7 acidic 7-14 basic
pH (con’t) In organisms, the pH must be maintained: blood 7.4, stomach acid 2.0 pH can affect the rate and nature of internal chemical reactions.
Section 2.2 Properties of Water. Polar Molecules molecules that have a slight positive region and a slight negative region Hydrogen Bond an attraction.
What is the importance of hydrogen bonding? How do compounds dissolve in water?
Properties of Water The most important inorganic compound for living organisms!
Water Frayer Packet. Water Structure –H 2 O – water has a bent “V” shape because oxygen pulls electrons more strongly than each hydrogen Define Polar.
4.4 Water Properties. Properties of Water Result of H 2 O – being a polar molecule- Oxygen end has a slight negative charge; Hydrogen end has a slight.
2.3 Chemistry of Water. Properties of Water Water has a high heat capacity.
2.2 Properties of Water Do Now Describe and draw a picture of a ionic bond Describe and draw a picture of a covalent bond.
The Science of Water in the Living World. Water is a polar molecule. Polar Molecule: a molecule that has a slightly positive side and a slightly negative.
2.2 Properties of Water KEY CONCEPT Water’s unique properties allow life to exist on Earth.
Properties of Water. Objectives: 1.Why are water molecules polar? 2.What are acidic solutions? 3.What are basic solutions?
Biology 107 Water September 2, Water Student Objectives:As a result of this lecture and the assigned reading, you should understand the following:
Biology 107 Water September 1, Water Student Objectives:As a result of this lecture and the assigned reading, you should understand the following:
Structure of water Oxygen and hydrogen of water is covalently bonded to create a stable molecule. Water is polar because the oxygen region is slightly.
Water Basics Polar: part of the molecule is slightly positive… other part slightly negative – Oxygen (-) – Hydrogen (+) Hydrogen Bond: Positive Hydrogen.
Lesson Overview Lesson Overview Properties of Water Lesson Overview 2.2 Properties of Water.
2.2 Properties of Water What makes water so special?
Properties of Water. Water = H 2 O Oxygen and Hydrogen are bonded together by Covalent Bonds O and H share some electrons.
The Chemistry of Life. Characteristics of Living Things All living things Are made of one or more cells Have a way to reproduce Grow and develop.
Properties of Water. Learning Objectives Discuss the unique properties of water. Differentiate between solutions and suspensions. Explain what acidic.
CHAPTER 2 Water and Life
Most important inorganic molecule in living things. Living organisms = 75-80% H 2 O. Many biological processes require H 2 O › Survive days.
August 29, 2005 Biology 107 Water. Water Student Objectives:As a result of this lecture and the assigned reading, you should understand the following:
Water. How Unique is Water?? Water is one of only 3 naturally occurring inorganic liquids Only chemical compound that naturally exists in all 3 states—solid,
10T2K © Water and pH. Thing 1: Water is polar Water is a polar molecule. That is, it has a negative end (at the oxygen) and a positive end (at each hydrogen).
August 23, What do organic compounds have that inorganic compounds do not have? 2. Why is water the universal solvent? 3. What bonds hold water.
Water Basics Polar: part of the molecule is slightly positive… other part slightly negative – Oxygen (-) – Hydrogen (+) Oxygen “hogs” hydrogen electrons.
Properties of H 2 O. KEY CONCEPT Water’s unique properties allow life to exist on Earth.
NOTES: 2.2 – Properties of Water. Water Overview… Water is perhaps the most important compound in living organisms Because so many substances can dissolve.
Properties of Water Objective: MC.1.B.3 Investigate the properties and importance of water and its significance for life: surface tension adhesion.
Properties of Water What is the symbol for water? H ₂O.
Water Chemistry and its Impact on Life Processes By Mrs.Gilani.
The Chemistry of Life Properties of Water. The Water Molecule Polarity –Polar molecules have a region with a slight positive charge and a slight negative.
10/8/14 Objective: What are the properties of water? Do Now: Take out your HW Chapter 4: The Chemical Basis of Life.
CHAPTER 2 CHEMISTRY AND BIOCHEMISTRY Chapter 2 Chemical Principles Structure of Atoms Chemistry is the science dealing with the properties & the transformations.
The Extraordinary Properties of Water. The extraordinary properties of Water A water.
Properties of Water Covalent bonding Polar covalent bond – unequal sharing of electrons A great example of a molecule with polar covalent bonds is water.
Section 6.3 Water & Solutions Evaluate how the structure of water makes it a good solvent. Distinguish mixtures and solutions. Define acids and bases and.
Water and its Properties CP Biology: Chapter 2. The Water Molecule needed by all living things – parts of cells, fluid around cells (humans 65% water)
Why does this hurt?. Water = H 2 O Oxygen and Hydrogen are bonded together by Covalent Bonds O and H share some electrons.
Water and the Fitness of the Environment. Polarity of Water Water is a polar molecule Water is a polar molecule Hydrogen of one H 2 O is attracted to.
Pre-AP Biology Water Properties (2.2) Part 1. Earth 2/3rds covered by water.
PROPERTIES OF WATER. WATER COVERS ¾ OF EARTH’S SURFACE MOST ABUNDANT COMPOUND IN LIVING THINGS LIQUID AT THE TEMPS FOUND OVER MUCH OF THE EARTH’S SURFACE.
The Nature Of Water By Mary Dann. Physical Properties of Water Water is necessary for life and is the most abundant component of living things Most marine.
All processes necessary for life take place in a watery environment.
Water and the Fitness of the Environment Chapter 3.
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