Water is made up of two hydrogen atoms and one oxygen atom, with a molecular weight of 18 units. Water exists in three states: liquid, gas, and solid ice. It freezes at 0°C and boils at 100°C. There are several types of water including hydrogen peroxide, distilled water, and hard water containing dissolved salts. Water can dissolve many substances like hydroxides, some carbohydrates, and some salts.

1. WATER IN CHEMISTRY
Water- H20 It consists of two hydrogen atoms and one oxygen atom. Molecular weight of two hydrogen
atoms is 2u, 16u of oxygen.
The molecular weight of water is 18U. Location on the periodic table. Hydrogen is the first main group, in
the first period. Oxygen is in the 16th group (6th main group), in 2nd period.

2. ●
Temperatures:
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At 4 degrees Celsius oxygen is dissolved in water.
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Water freezes at 0 degrees Celsius and boils at 100 degrees Celsius.
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Water exists in three states of matter.
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Liquid (water)
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Gaseous (water vapor)
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Solid state (ice)

3. Several types of water:
- Hydrogen peroxide - 3% aqueous hydrogen peroxide solution used to disinfection
- Distilled water - Purified water not containing dissolved salts, used in laboratories and car batteries.
- Hard water - water containing dissolved compounds of magnesium and calcium.

4. ACIDS
Water top-soluble substances:

5. Hydroxides
(actually bases because some hydroxides are not dissoluble)

6. Some carbohydrates
(eg. sucrose) (cellulose, chitin)

7. Some salts

8. THANKS FOR WATCHING!
GROUP 1
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Ania Hermanowska
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Zuzia Pruchniak
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Agata Mikoda
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Ania Woszczyk
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Noelia Afonso Martín - Spain
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Gorka Arnay Esteban - Spain
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María Samara Ascanio Castro - Spain
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Lucía Castañeda Benites - Spain
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Andrea Candelaria Domínguez Medina - Spain
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Adil José El Founti Afonso - Spain
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Philip - Germany
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In this presentation we used our own photos. ☻