Your SlideShare is downloading. ×
Water
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×

Introducing the official SlideShare app

Stunning, full-screen experience for iPhone and Android

Text the download link to your phone

Standard text messaging rates apply

Water

251
views

Published on

Published in: Technology, Business

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
251
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
0
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Water
  • 2. Water
    Water is the medium in which all reactions take place in living cells.
    Materials are moved across body in watery medium.
    Water is a major habitat (oceans, rivers, ponds and lakes)
    70% of the body is water.
  • 3. Properties of water
    Water molecule is slightly polarised - slight negative charge (in oxygen atom) and slight positive charge (in hydrogen atoms)
    Because of this dipole, water molecules can form hydrogen bonds.
    Due to this water molecules 'stick together'
    Therefore water has a high melting and boiling points (it takes more energy to overcome the attractive forces of hydrogen bonds)
  • 4. Properties of water
    Water is excellent solvent
    Water has one of the highest known surface tensions
    Water molecule is amphoteric
    (Water can act both as an acid ad as a base)
  • 5. Emulsions and Suspensions
    Water insoluble substances form emulsions or suspensions
    Emulsions are tiny droplets of one liquid suspended in another liquid
    Suspensions are formed when a solid is mixed with a liquid and particles will separate out in the mixture is not constantly stirred.
  • 6. Emulsions and Suspensions
    Blood is a suspension of cells in plasma.
    Fats are usually transported as emulsions in a watery medium.
  • 7.
  • 8. Water strider