Resumen
Summary IBDP HL Biology - 2.2 Water Notes
- Grado
- Institución
- Book
Providing a comprehensive summary of subsection 2.2 Water unit of the IBDP Biology course. Suitable for both HL and SL. All points of the syllabus covered.
[Mostrar más]Vista previa 2 fuera de 6 páginas
Vista previa 2 fuera de 6 páginas
Añadir al carrito
Añadir al carrito
Libro relacionado
Título del libro:
Autor(es):
- Edición:
- ISBN:
- Edición:
Más resúmenes para
-
Biodiversidad- Biología IB NM
-
Nutrición- Biología IB NM
-
Tema Biología IB: Ecosistemas
Vendedor
Seguir
yeechientan
Vista previa del contenido
Water08
_
Molecular structure
I \
- H2O Hst Hst
- held by covalent bond ,
↳ Hz share electrons w/ oxygen
7
Hydrogen bonds
-
02 atom in water = 8- ( slightly negative )
↳ has 8 protons in nucleus = attracts more electrons
↳ more electronegative
-
Hz = 8-1 ( slightly positive )
↳ has 1 proton = electrons being attracted
since ◦
pp .
Charges
_
bonds attract
= can form hydrogen
-
weak interactions bet . H2O molecules
↳ responsible for H2O properties ( cohesion & adhesion )
-
forms bet .
Oz atom and Hz atom on a DIFFERENT molecule
-
Hz bonds = transitory
↳ Can form break and re -
form constantly
,
Polarity
-
covalent bonds bet .
H and O atoms have a
slight potential charge
Polar molecule
=
-
Charged regions can attract other polar / charged compounds
, Properties of water
cohesion - the force by which individual molecules stick together
↳ H2O = strongly cohesive
each H2O molecule bonded
Explanation tetrahedral
4 others in
/
to
arrangement
-
due to polarity and Hz bonds
-
although Hz bonds are weak
,
↑ no . Of bonds = ↑ strength of cohesive
forces
responsible for 1-120 forming a
spherical shape
↳ minimises area : volume
Importance to organisms
-
allows for ↑ Surface tension
↳ liquids can resist low tuts .
Of ext . force
↳ smaller organisms can move along surface
-
transpiration stream : H2O can travel in a continuous column
↳ upper parts of plant can receive H2O
adhesion -
ability to stick to other polar / Charged molecules
Explanation
-
due to polarity and Hz bonds
↳ ↑ no . of bonds = ↑ adhesive forces strength
- water sticks to other polar / Charged molecules
>
Importance to organisms
-
responsible for capillary action
↳ movement of H2O molecules ( and the substances dissolved in it) in
opposition of gravitational forces -
↳ H2O transported up stems via transpiration streams
-
xylem transport
Los beneficios de comprar resúmenes en Stuvia estan en línea:
Garantiza la calidad de los comentarios
Compradores de Stuvia evaluaron más de 700.000 resúmenes. Así estas seguro que compras los mejores documentos!
Compra fácil y rápido
Puedes pagar rápidamente y en una vez con iDeal, tarjeta de crédito o con tu crédito de Stuvia. Sin tener que hacerte miembro.
Enfócate en lo más importante
Tus compañeros escriben los resúmenes. Por eso tienes la seguridad que tienes un resumen actual y confiable. Así llegas a la conclusión rapidamente!
Preguntas frecuentes
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
100% de satisfacción garantizada: ¿Cómo funciona?
Nuestra garantía de satisfacción le asegura que siempre encontrará un documento de estudio a tu medida. Tu rellenas un formulario y nuestro equipo de atención al cliente se encarga del resto.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller yeechientan. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for 4,93 €. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
45,681 summaries were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 14 years now