Parts per billion is a number of units of solute in 1 billion of units of the solution. Osmosis and Dialysis. Colligative properties - properties that depend only on the number of solute particles per unit quantity of solvent, not on the chemical identity of the solute. Osmosis and dialysis - ability of components of the solution to migrate through different kinds of membranes. Osmotic membranes and dialyzing membranes the difference is in the pore size.
Osmotic membranes have smaller pores.
Osmosis is the net migration of water through an osmotic membrane. The net effect is equalizing - solvent flows from the solution with the lower concentration to the solution with the higher concentration. The ions in ionic compounds individually affect osmotic pressure. Dialysis is analogous to osmosis but the pores in the membrane are larger It is affected by colloidal osmotic pressure. Dialysis and the bloodstream, hemolysis, crenation.