ch. 2-2 in class notes properties of water. water, water everywhere if you have ever seen a...
TRANSCRIPT
![Page 1: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/1.jpg)
CH. 2-2 IN CLASS NOTES
PROPERTIES OF WATER
![Page 2: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/2.jpg)
Water, Water Everywhere
If you have ever seen a photograph of Earth from space, you know that much of the planet is covered by water. Water makes life on Earth possible. If life as we know it exists on some other planet, water must be present to support that life.
Section 2-2
Interest Grabber
Go to Section:
![Page 3: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/3.jpg)
1. THE WATER MOLECULEH2O
NEUTRAL-10 P & 10E
BENT SHAPE P. 40
![Page 4: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/4.jpg)
2. WATER IS A POLAR MOLECULE
O-SLIGHT NEG. CHARGEH-SLIGHT POS. CHARGEMOLECULES IN WHICH THE
CHARGES ARE UNEVENLY DISTRIBUTED
LIKE A MAGNET W/ POLES---=_____ & += BETWEEN_____
![Page 5: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/5.jpg)
3. HYDROGEN BONDS--------
NOT AS STRONG AS IONIC OR COVALENT(STRONGEST)
POLAR MOLECULES ATTRACT EACH OTHER—BECAUSE PARTIAL + / -
![Page 6: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/6.jpg)
4. PROPERTIES OF WATER
A. SINGLE MOLECULE MAY HAVE 4 H-BONDS AT THE SAME TIME
B. COHESION-ATTRACTION BETWEEN MOLECULES OF THE SAME SUBSTANCE
EX. WATER BEADS
![Page 7: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/7.jpg)
C. ADHESION
ATTRACTION BETWEEN MOLECULES OF DIFFERENT SUBSTANCES
EX: READING A GRAD. CYL.; CAPILLARY ACTION IN PLANTS
ADHESION BETWEEN WATER & GLASS IS STRONGER THAN WATER VS. WATER
![Page 8: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/8.jpg)
D. MIXTURE
2 OR MORE ELEMENTS OR COMPOUNDS THAT ARE PHYSICALLY MIXED
EX: SALT/PEP. STIRREDEARTH’S ATMOSPHERE
![Page 9: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/9.jpg)
E. 2 TYPES OF MIXTURES WITH WATER
1. SOLUTIONS-all the compounds are evenly distributed throughout
a. solute-substance dissolved (salt)b. solvent-substance in which the
solute is dissolved (water)
![Page 10: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/10.jpg)
Cl-
Water
Cl-
Na+
Water
Na+
Section 2-2
Figure 2-9 NaCI Solution
Go to Section:
![Page 11: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/11.jpg)
Section 2-2
Figure 2-9 NaCI Solution
Go to Section:
Cl-
Water
Cl-
Na+
Water
Na+
![Page 12: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/12.jpg)
2. SUSPENSIONS
Water & nondissolved material; when some materials do not dissolve
Ex. Blood & components
![Page 13: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/13.jpg)
DOUBLE ARROW MEANS…..
THE REACTION CAN OCCUR IN BOTH DIRECTIONS
ARROW MEANS “FORMS” OR “PRODUCES”
![Page 14: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/14.jpg)
CHEMICAL EQUATION
H2O H+ + OH—
REACTANTS PRODUCTSBEFORE AFTER
![Page 15: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/15.jpg)
Oven cleaner
Bleach
Ammonia solution
Soap
Sea water
Human bloodPure waterMilkNormalrainfall
Acid rainTomatojuice
Lemon juice
Stomach acid
NeutralIn
crea
sing
ly B
asic
Incr
easi
ngly
Aci
dic
Section 2-2
pH Scale
Go to Section:
![Page 16: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/16.jpg)
1. What is pH used for?
To determine acids, bases and neutral substances
![Page 17: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/17.jpg)
2. What does the pH value 7 mean?
There is an equal number of H+ ions and OH- ions. Example: pure water; neutral
![Page 18: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/18.jpg)
3. Substances with a pH value above 7 are considered bases.
Under 7 are considered acids
![Page 19: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/19.jpg)
4. What is the purpose for using a known base, a known acid, and distilled water?
The control part of the lab. To make sure the pH paper is working properly.
![Page 20: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/20.jpg)
5. ACIDS, BASES AND pH
A water molecule can react to form ions.
H2O H+ + OH—
Water forms
hydrogen +hydroxideion ion
![Page 21: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/21.jpg)
6. pH Scale= Potential or Power of Hydrogen
Indicates the concentration of H+ ions in a solution
Ranges from 0-14pH 7= H+ and OH- are
equal------pure water=7 NEUTRAL
![Page 22: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/22.jpg)
7. Acidic-any compound that forms H+ ions in solution
pH below 7, more H+ ions than OH- ions
The lower the pH the greater the acidity
Ex: HCl-hydrochloric acidIn your stomach=______
![Page 23: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/23.jpg)
8. Base-any compound that produces OH- ions in a solution
A.K.A= AlkalineLower concentrations of H+
ions than water, more OH- ions
pH value above 7Ex: oven cleaner=_______
![Page 24: CH. 2-2 IN CLASS NOTES PROPERTIES OF WATER. Water, Water Everywhere If you have ever seen a photograph of Earth from space, you know that much of the](https://reader035.vdocuments.net/reader035/viewer/2022062417/551bd07c550346b4588b5450/html5/thumbnails/24.jpg)
E. BUFFERS
WEAK ACIDS OR BASESPREVENT SHARP CHANGES IN pH
Human body cells-pH6.5-7.5-homeostasis