Solutions Tyndall effect

Colloids will reflect or scatter light while true solutions do not this is known as the Tyndall effect. 

The molecular mass determined osmometrically corresponds to the formula S5O. The SO stretching vibration was observed in the infrared spectrum at 1119 cm (at -65 °G) indicating an exocyclic sulfoxide group similar to the one in SsO (see below). At -50 °G the solution of S5O may be kept for several days without decomposition which usually results in a Tyndall effect caused by a colloidal polymeric sulfuroxide which is the expected decomposition product. At 25 °G some decomposition already occurs within... 

A Na2C03 is the only solute that exhibits the Tyndall effect. 

Figure 1.5 The variation of precipitation times with molar ratios of a = HCO3 / Fe(III) for 0.6 M iron(III) perchlorate solutions, t is the somewhat arbitrarily defined time elapsed before a Tyndall effect is observed. (From Crichton, 1991.)...

If a beam of light is passed through a colloidal solution, the colloidal particles will reflect or scatter the light so that the beam becomes visible when the solution is viewed from the side against a dark background. This Tyndall effect is used in the ultramicroscope. 

Chicken broth is cloudy because it is colloidal, containing microscopic particles of chicken fat suspended in the water-based soup. Like milk, cream or emulsion paint, the cloudy aspect of the soup is a manifestation of the Tyndall effect. Adding the eggshells to the colloidal solution removes these particles of fat, thereby removing the dispersed medium. And without the dispersed medium, the colloid is lost, and the soup no longer shows its cloudy appearance. We say we have broken the colloid. 

Colligative properties are those properties of solutions that depend on the number of solute particles present and not their identity. Colligative properties include vapor pressure lowering, freezing point depression, boiling point elevation, and osmotic pressure. Colloids are homogeneous mixtures, in which the solute particles are intermediate in size between suspensions and true solutions. We can distinguish colloids from true solutions by the Tyndall effect. 

The simplest way to distinguish a colloid from a solution is a. the Tyndall effect b. the osmotic pressure... 

A colloid is a mixture in which the solute particle size is intermediate between a true solution and a suspension. If a light is shone through a colloid, the light beam is visible. This is the Tyndall effect. 

The solution is transformed to an oil-in-oil emulsion in which a polystyrene solution forms the disperse phase and the elastomer polyester component solution the continuous phase. The point of phase separation is observed experimentally by the onset of turbidity, due to the Tyndall effect. The conversion required for phase separation to occur depends basically on the solubility of the polystyrene chains in the elastomer solution, which in turn is governed by the elastomer concentration and compatibility of the two polymers. 

To detect the Tyndall effect, use a device (Fig. 108) consisting of a box divided into two equal parts by partition 1 with small aperture 2 at its middle. An electric lamp (100-150 W) is installed in outer wall 3 of the box. The second half of the box is provided with shelf 4 on which a beaker with a solution is placed. Observations are performed through an opening in the box door. 

Solutions of cellulose derivatives, such as nitrocellulose, passed through a fine porous filter demonstrate neither the Tyndall effect, nor the presence of particles visible in the ultra-microscope. This is one more piece of evidence that the properties of these solutions are the same as those of substances with low molecular weight. The same holds for cellulose in ammoniacal solutions of cupric oxide ( cupr-ammonium ). 

TYNDALL EFFECT. A phenomenon first noticed by Faraday (1857). When a powerful beam of fight is sent through a colloidal solution of... 

A solution is a homogeneous mixture that has one or more solutes dispersed at a molecular or ionic level throughout a medium called the solvent. The dispersed phase in a colloid is much larger than a typical molecule. For this reason, colloids exhibit the Tyndall effect, or the ability to trace out a ray of light shown through the colloid. 

F 1 Fattakhov, K. Z., V. N. Tsvetkov and O. V. Kalustov Investigation of solutions of linear polymers by the light-dispersion method (Tyndall effect). Zhur. Exper. i Teoret. Fiz. 26,345,351 (1954). 

Colloidal dispersions may appear either translucent or cloudy, depending on the type of colloid and the degree of particle concentration and dispersion. The colloidal particles cannot be easily distinguished from water. They possess properties that are very different from other solid settable suspensions and from solutions. When the colloidal particles are < 5 pm, they have erratic aleatory movements known as Brownian movements, caused by collisions with molecules from the dispersion medium. When a light beam passes through a colloidal dispersion, this reflects and scatters light (Tyndall effect). 

The scattering of light by particles is called the Tyndall effect (Fig. 17.22) and is often used to distinguish between a suspension and a true solution. 

The Tyndall effect. The yellow solution does not show the path of the light beam, whereas the suspension of iron(lll) hydroxide clearly shows the light path. 

Tyndall effect (p. 479) unsaturated solution (p. 458) vapor pressure lowering (p. 472)... 

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