Osmosis

Theories on the Cause of Osmosis A simple and appealing accounting for osmosis is the niggardliness of piss explanation-- pissing in pure peeing is only much concentrated than piss in responses because the solute has to take up some room in the dissolvent. According to this idea, pissing diffuses into a hyperosmotic solution because it is diffusing down its soaking up gradient. As Weiss (1996) points out, this predicts water movement in the refinefulness direction, tho not of the right magnitude. Water movement in osmosis is faster than diffusion, and seems to be more than like mass water movement caused by a pressure difference (Weiss, 1996, p. 218). Also, as Salisbury and Ross (1992, p. 39) point out, adding solutes to a solution decreases the concentration of water in most cases, exclusively in some cases solutions have a higher concentration of water . The Handbook of Chemistry and Physics has a colossal section on solutions of common solutes, and it discl oses that a 0.2 M solution of NaCl has a markedly higher water concentration (995 g/L) than a 0.2 M solution of sucrose (955 g/L) (Wolf et al., 1982, pp. D261 and D270). therefore far our experiments will disclose that a potato cores loses water to a 0.2 M solution of NaCl but it gains water from a 0.2 M solution of sucrose. Also, if we compare 0.2 M solutions of sucrose and glucose, 0.

2 M glucose has a higher water concentration than 0.2 M sucrose (976 g/L vs. 955 g/L) (Wolf et al, 1982, p. D239) . This makes sense because the littler glucose molecules take up less room in the solution. However, these dickens solu tions have scarcely the same osmotic potent! ial. A middling more thickening theory that is often found in general biology books (including your text, p. 117) is the bound water explanation. This says that any deliquescent solute (like sucrose or NaCl) will bind up hydrating water and prevent it from wretched freely. Therefore, the brass of a semipermeable tissue layer with pure water has a higher free water concentration than the side with...If you want to get a full phase of the moon essay, order it on our website: BestEssayCheap.com

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