(ii) Solution of liquids in liquids fall into two classes those in which liquids are freely miscible in all proportions e.g., ethyl alcohol in water and secondly those in which two liquids are sparingly soluble e.g. (i) Solution of a gas in a liquid, carbon dioxide, nitrogen and oxygen are commonly found as gases in solution.
Three types of solutions occur in the cells: Water also causes cell and tissue turgidity during growth and participates in the cell elongation phase. Its hydrogen atom is incorporated in organic matter during photosynthesis, causes plant movements and is the metabolic end product of respiration. For example, it is a major constituent of protoplasm and it carries mineral nutrients from cell to cell. Water is significant to plant life in several ways. Also, water has high surface tension and this accounts for its capillary action. The heat of vaporization of H 2O is unusually high. It has highest boiling point and is highly polarized and behaves like dipoles. It is universally available and has specific characteristic features. Water is the most common solvent in the plant cell and its environment. As a result a true solution is formed.ĭepending open the solvent whether it is liquid, solid or gas, following categories of solution may be formed. In other words, common salt (NaCl) breaks into Na + and CI sup ions in water and these are evenly distributed. This means that while the former remains intact in water the latter ionizes in water. For instance, sucrose is a non-ionic substance whereas common salt is an ionic substance.
In our example, it may be stated that both common salt and sucrose form solutions but these are of different kinds. The solution in such situations is said to be saturated. The solution may be dilute or concentrated depending upon the quantity of the solute added in the solvent.Īt a given temperature and pressure, only a specific quantity of solute can be dissolved in a given solvent.
In a dilute solution as described above, solute does not settle down but remains evenly dispersed. The Tyndall effect allows sunlight to be seen as it passes through a fine mist.With constant stirring the solute molecules get evenly dispersed through the solvent in a uniform mixture of the two. When it passes through a diluted milk solution, the light is scattered by colloidal particles, an observation of the Tyndall effect. \): Light passes through a colorless solution and is not scattered.
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