BRAINCAKEChemistry for Life
Revision notes for Chemistry for Life in Edexcel Biology B (8BI0). Every lesson in BrainCake comes with R.E.C.I.P.E. recall steps, a quick check and spaced reviews.
- Ionic BondingIonic bonding happens when one atom transfers one or more electrons to another atom.
- Covalent BondingA covalent bond is a shared pair of electrons between two atoms.
- Important AnionsInorganic ions are needed by all organisms in small amounts, but each has specific roles.
- Important CationsCations are positively charged ions.
- WaterA water molecule, H2O, has two hydrogen atoms joined to one oxygen atom by covalent bonds.
- Water as a Polar SolventWater is often called the universal solvent because so many substances dissolve in it.
- Water as a Transport MediumTransport systems in animals and plants move substances in solution, and water is the liquid that does the carrying.
- Water as a HabitatMuch of Earth's life lives in water: oceans, rivers, lakes and ponds.
- Water in Plant Transport SystemsPlants move water from the roots to the leaves through xylem vessels: long, hollow tubes made of dead cells with no end walls, whose walls are…
- Water in Hydraulic MechanismsLiquid water is almost incompressible: squeezing it hardly reduces its volume.
On the specification
- 1.6 Inorganic ions
- 1.7 Water