St. George's College
Subject: 7th CHEMISTRY
Class:
Teacher's notes
Objectives
Chemistry of Water
Vocabulary Link and Learn
Date: In‐Class Survey
September 14th
Prepared by
2009 1
7th Beethoven ‐ Chemistry of Water Name
Name
Reward
Ariana
Luis
Gabriel
Andrea
Andrea
Sebastián
Abraham
Ivanna
Giacomo
Camila
Fabiana
Carlos
Sinead
Aarón
Liliam
Paola
Francesca
Enrique
Rodrigo C.
Alessandra
Andres
Irma
Stefano
Sophia
Jean Pierre
Naomi
Diego
Kiara
Rodrigo H.
Christopher
Reward
2
7th Mozart ‐ Chemistry of Water Name
Reward
Name
Nicole
Roberto M.
Luis
Giancarlo
Luciana
Fiorella
Antonella
Gabriela
Valeria Ch.
Steffano
Valeria C.
Javier
Sylvana
Roberto R.
Analucía
Diego
Camila
Luis Fernando
Franco
Sebastián
Ramiro
Julio
Sara
Sherley
Alicia
César
José Luis
Vilma
Sergio
Alessandra V.
Reward
3
Let's remember previous learned concepts...
Why is Water important?
4
Hydrogen Bonding • Certain substances such as H2O, HF, NH3 form hydrogen bonds, and the formation of which affects properties (melting point, boiling point, solubility) of the substance. • Other compounds containing OH and NH2 groups also form hydrogen bonds. • Molecules of many organic compounds such as alcohols, acids, amines, and aminoacids contain these groups, and thus hydrogen bonding plays an important role in biological science.
5
6
Hydrogen Bonds in DNA
http://tinyurl.com/ygoej6
7
New knowledge beginning......
8
The Water Cycle
9
Water in the World
10
Characteristics of Water • Certain molecules have an uneven distribution of positive and negative charges on its atoms. For example: WATER.
PHYSICAL
The 5 most common are: temperature, taste, colour, odour and turbidity.
CHEMICAL
The most important chemical characteristics of water are its acidity, alkalinity, hardness, and corrosiveness.
CHARACTERISTICS
11
Characteristics of Water • The most common and unusual liquid is Water. • A rare characteristic of water, is the fact that it is liquid at room temperature, for a molecule of such low molar mass. • The freezing and boiling points of water are much higher than one might expect from a comparison of these properties to those of similar substances.
What freezing and boiling points would you expect for the molecule of water from the information in the table? Freezing Point
Boiling Point
12
Properties of Water • Most properties of water are anomalous. • As in other liquids, the density of water increases when the temperature is lowered. But in the water molecule, only down to 4°C. • Below this temperature, the liquid density decreases. • The density of ice (solid water) is higher than that of liquid water. Water is one of very few liquids, whose solid form floats. • This property has significant consequences for bodies of water: lakes, lagoons, etc. The temperature at the bottom is never lower than 4°C, unless the body of water freezes completely from surface to bottom.
13
Properties of Water ADHESION COHESION
• Water molecules are attracted to other molecules of water. This is called Cohesion. • Water can also be attracted to other materials. This is called Adhesion. • This is explained by the uneven distribution of charge in the molecule of water, generating electrostatic attraction and repulsion. • Those interactions give water its cohesive and adhesive properties.
SURFACE TENSION
Is the cohesion of water molecules at the surface of a body of water.
CAPILLARY ACTION
• Surface tension is related to the cohesive properties of water. • Capillary action however, is related to the adhesive properties of water. Example: Place a straw into a glass of water. The water 'climbs' up the straw. What is happening is that the water molecules are attracted to the straw molecules. • Capillary action is limited by gravity and the size of the straw. The thinner the straw or tube the higher up capillary action will pull the water.
14
SURFACE TENSION
CAPILLARY ACTION
ADHESION COHESION
15
Water Quiz Click Here
16
Work in Class ‐ Beethoven Gather up with your group, read the material and books available to prepare an Infography about:
WATER
1. Dead Sea: Describe all the characteristics and properties of the Dead Sea, and its ecosystem. . 2. Mars: Investigate all the information available about water in Mars, and its possible consequences. . 3. Polar Ice caps: What is the current knowledge about the poles and their future. . 4. Life in the Deep Sea: Describe the characteristics and prepare a food chain about life in the bottom of the sea. . 5. Biochemistry: Describe the participation and importance of water in the cell. . 6. Water as Electricity: Identify and describe the process that uses water as a source of electric energy. . 7. Water in Industry: Identify and describe the uses of water in the industrial processes of our society. .
17
18
Group 1
Group 2
Group 3
Group 4
Diego Rodrigo C. Naomi Paola
Fabiana Jean Pierre Andres Stefano
Luis Andres Sophia Irma
Alessandra Francesca Sebastian Christopher
Group 5
Group 6
Group 7
Sinead Aaron Ivanna Enrique
Andrea Giacomo Kiara Lilliam Camila
Carlos Gabriel Rodrigo H. Ariana Abraham
19
Work in Class ‐ Mozart
WATER
Gather up with your group, read the material and books available to prepare an Infography about: 1. Dead Sea: Describe all the characteristics and properties of the Dead Sea, and its ecosystem. Julio, Sara, Vilma, Alicia. 2. Mars: Investigate all the information available about water in Mars, and its possible consequences. Gabriela, Sherley, Roberto R., Valeria C. 3. Polar Ice caps: What is the current knowledge about the poles and their future. Alessandra V. Luis, Giancarlo, Sylvana. 4. Life in the Deep Sea: Describe the characteristics and prepare a food chain about life in the bottom of the sea. Steffano, Diego, Sebastian, Valeria Ch. 5. Biochemistry: Describe the participation and importance of water in the cell. Luciana, Jose Luis, Camila, Luis Fernando, Franco. 6. Water as Electricity: Identify and describe the process that uses water as a source of electric energy. Sergio, Analucia, Antonella, Cesar. 7. Water in Industry: Identify and describe the uses of water in the industrial processes of our society. Javier, Fiorella, Roberto M., Nicole, Ramiro.
20
21
Group 1
Group 2
Group 3
Group 4
Julio Sara Vilma Alicia
Steffano Diego Sebastian Valeria Ch.
Gabriela Sherley Roberto R. Valeria C.
Luciana Jose Luis Camila Luis Fernando Franco
Group 5 Javier Fiorella Roberto M. Nicole Ramiro
Group 6 Alessandra V. Luis Giancarlo Sylvana
Group 7 Sergio Analucia Antonella Cesar
22
Teacher's Notes This class has been designed to cover the topics of Chemistry of Water from Monday, September 14th till Friday, September 18th. For further knowledge about this topic: 1. Conduct a thorough search under the topic: Chemistry of Water on the Web, books and magazines. 2. If findings are not specific, ask your teacher for suggestions.
BACK 23
Objectives • Identify and describe the properties, functions and importance of the molecule of Water.
Note: All, or most, of the objectives will be covered during class time, however the student must be responsible for those objectives not covered or concluded.
BACK 24
Vocabulary • • • • • •
Melting Point Boiling Point Density Surface Tension Tension‐Cohesion Dipole
Note: Most of the vocabulary words will be covered during class time, however the student must be responsible for those words not covered or concluded.
BACK 25
Link and Learn You can visit the following websites to improve your understanding on the present topic: • • • •
http://bit.ly/XjtI4 http://science‐learning2009.wikispaces.com http://learningandscience.blogspot.com http://libraryatstgeorge.blogspot.com
BACK 26
Prepared by
Gerardo LAZARO Science Lead Teacher Email: glazaro@sanjorge.edu.pe Wiki: http://science‐learning2009.wikispaces.com Blog: http://learningandscience.blogspot.com Twitter: http://twitter.com/glazaro
BACK 27
SURVEY If you want to contribute in improving your Chemistry class, click in the survey link:
Term III ‐ 8th A ‐ Class 6
Term III ‐ 8th Alpha ‐ Class 6
28
Resources Used Slide (Group)
Description
Resource
Origin
G1 ‐ 2
Image
Milton
http://bit.ly/XQqEw
G1 ‐ 3
Image
Milton
http://bit.ly/XQqEw
G1 ‐ 4 Animation Idea
Notebook Gallery
G1 ‐ 5
Hydrogen Bond in Water 1 Image Animation Hydrogen Bond in Water 2
http://tinyurl.com/m9yvw8 http://tinyurl.com/lh8ro6
G1 ‐ 6
Animation DNA 1 DNA 2 Image
http://tinyurl.com/mygfju http://tinyurl.com/ygoej6
G1 ‐ 7
Animation Check this out
Notebook Gallery
G1 ‐ 8 Animation Water Cycle G1 ‐ 9
Animation Global Distribution of Water
Unknown Unknown
G1 ‐ 10 Images
Water Molecule Senses Chemicals
http://tinyurl.com/lh8ro6 http://bit.ly/2lKRjX http://bit.ly/un2Dh
G1 ‐ 11 Image
Table
http://bit.ly/oS4yU
G1 ‐ 12 Images
Density of Water Triple Point
http://bit.ly/SaU0C http://bit.ly/RvazO
G1 ‐ 14 Images
Surface Tension Adhesion‐Cohesion Capillary Action
http://bit.ly/vz35G http://bit.ly/13vfts http://bit.ly/fBsb
G1 ‐ 15 Image
Questions
http://bit.ly/1mVVa1
G1 ‐ 19 Images
Molecular Geometry 1
Unknown
G1 ‐ 20 Image
Molecular Geometry 2
http://tinyurl.com/n5yvbw
G1 ‐ 19 Animation Ionic vs Covalent Bonding
http://tinyurl.com/lcghho
G1 ‐ 20 Animation Covalent Bonding
http://tinyurl.com/l4psxt
G1 ‐ 21 Animation VSEPR
Unknown
29
7th Chemistry Grade: Subject: Date:
7th Beethoven Chemistry 25Sep09
30
What was your UNDERSTANDING of the topic: "Chemistry of Water"?
1
A
I understood 25% of the whole topic
B
I understood 50% of the whole topic
C
I understood 75% of the whole topic
D
I understood 100% of the whole topic
E
I didn't understand the class
31
2
What was your level of EFFORT to understand the topic?
A
My effort level was 25%
B
My effort level was 50%
C
My effort level was 75%
D
My effort level was 100%
E
I didn't put any effort
32
3
What RESOURCES helped you understand the topic? A
Text
B
Images
C
Animations
D
Videos
E
Teacher's Speech
F
None
G
Other
33
4
How does the SMART Board help you understand the topic?
A
It helps me visualize concepts
B
It helps understand difficult concepts
C
Touching things helps me learn
D
Interacting with the information makes it easier to understand
E
I prefer less effects or audiovisual resources
F
It doesn't really help much
G
I don't like it
34
7th Chemistry Grade: Subject: Date:
7th Mozart Chemistry 25Sep09
35
What was your UNDERSTANDING of the topic: "Chemistry of Water"?
1
A
I understood 25% of the whole topic
B
I understood 50% of the whole topic
C
I understood 75% of the whole topic
D
I understood 100% of the whole topic
E
I didn't understand the class
36
2
What was your level of EFFORT to understand the topic?
A
My effort level was 25%
B
My effort level was 50%
C
My effort level was 75%
D
My effort level was 100%
E
I didn't put any effort
37
3
What RESOURCES helped you understand the topic? A
Text
B
Images
C
Animations
D
Videos
E
Teacher's Speech
F
None
G
Other
38
4
How does the SMART Board help you understand the topic?
A
It helps me visualize concepts
B
It helps understand difficult concepts
C
Touching things helps me learn
D
Interacting with the information makes it easier to understand
E
I prefer less effects or audiovisual resources
F
It doesn't really help much
G
I don't like it
39