tonicity tonicity of two solutions separated by a semipermeable membrane, is the relative...
Post on 18-Jan-2018
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10% NaCl 90%H 2 O 10% NaCl 90%H 2 O NO NET MOVEMENT - cell stays the same
TRANSCRIPT
Tonicity
Tonicity of two solutions separated by a semipermeable membrane, is the relative concentration of solutions that determine
the direction and extent of diffusion.
10% NaCl90%H2O
10% NaCl90%H2O
NO NET MOVEMENT - cell stays the same
10% NaCl90%H2O
20% NaCl80%H2O
Water moves into the cell causing it to swell.
15% NaCl85%H2O
5% NaCl95%H2O
Water moves out of the cell causing it to shrink.
It can be a bit confusing…
• So we name the solution based on it’s relative concentration of solute to water (more or less solute than water?)
• However, it’s the water that will diffuse (osmosis) into or out of the cell where there is a greater need for water (where there’s more solute).
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