Quote by toxictea23
-Chemical fertilizers are composed of salts that dissolve into soil moisture and then are absorbed by the root cells of
a plant. Why should you never overfertilize a plant?
(I know this has something to do with osmosis and diffusion, but thats the only clue
the teacher gave me. I was wondering if anyone could point out to me basically how they got the answer to this and how
the process goes)
First know the definition of diffusion and the differences between the 2 (diffusion = movement of ANY molecule to
establish some balance; Osmosis = WATER diffusion across a semi-permeable membrane due to differences in solue
concentration). Which side will the water go to? (Hypertonic = side with the most solutes, Hypotonic = side with the
least solutes)
When you over-fertilize a plant you're putting a lot of excess solutes (soluble stuff) outside of the roots in the
soil. If the soil is hypertonic to the root cells (have more solutes/fertilizer than the roots has
solutes/ions/organelles/what other cell stuff), then the water will tend to travel outside to the soil. Thus very little
water is entering the root cell and going to the plant & the plant gets dehydrated (wilts and then dies). Think of
it like yourself eating a bunch of salt - you're going to need a lot of water to help restablize your solute
concentrations or you will die (really you will from excess salt).
Quote by toxictea23-Why do some people add salt to a steak only after it has been cooked?
Only explanation I can say is that if you add salt onto the steak during the cooking process, the side with the greater
solute concentration will be outside of the steak. Then osmotic action will come in and squeeze the fluids outside (all
the tasty steak juices will flow out) and spill out onto the coals of your grill. Only other times whenever you do add
salt "en masse" for grill cooking is when you wrap the food in tin foil. There's also the
"salt-crust" dishes where you literally cover meats (fish, hams, etc.) in a salt/spice cover.
Ex: Salt-Crust Salmon
This just normal HS biology, or is this AP Biology (or the Canadian equivalent of college-level basic Biology)? I miss
those days four years ago, so easy back then OX